Browsing by Author "Munsell, John F."
Now showing 1 - 20 of 71
Results Per Page
Sort Options
- Adoption of sustainable forestry practices by Non-Industrial Private Forest owners in VirginiaRasamoelina, Maminiaina Solonirina (Virginia Tech, 2008-05-09)The concept of Sustainable Forest Management (SFM) has been promoted in the past few decades all over the world. Non-industrial private forest (NIPF) owners play an important role in that aspect in the U.S. because of their number (about 16 millions), the size of forest land under their control (about half of all forest land in the continental US), and the dynamism of their population (increasing number of new owners). This study sought to better understand how NIPF owners come to a decision for adoption (or non-adoption) of SFM practices. We developed a theoretical model combining four theories (the Value-Belief-Norm theory, the Theory of Planned Behavior, the Elaboration Likelihood Model, and the Innovation-Diffusion Process) to explain NIPF's decision making. Using multivariate analyses, we determined which elements of the developed theoretical model were significant in explaining adoption of eight groups of practices. Overall, some of the most significant predictors of adoption we identified were technical assistance, motivations for owning land and the use of a written management plan. Particular attention was also directed toward the eventual relationship between education and adoption of SFM practices and it was found that NIPF owners who attended educational programs tended to be likely adopters compared to those who did not attend any educational program. Since SFM was not limited to the US, we also analyzed the concept of SFM with the same goals as in the US, but under a completely different context (socio-cultural, economic and ecologic) in Africa, through the community-based natural resource management (CBNRM) system. We used four case studies and focused on criteria such as participation, equity (both procedural and distributive, power devolution, trust, etc) to analyze how CBNRM works on the field, what lessons to take from the cases to better ensure the goal of sustainability of the resources.
- Agroforestry Education: The Status and Progress of Agroforestry Courses in the U.S.Wright, Matt (Virginia Tech, 2017-04-24)Many agroforestry leaders today believe that an increase in agroforestry coursework, certifications, and institutional degree programs would help agroforestry professionals gain the proper education and training needed to better promote agroforestry implementation (Gold, 2015; USDA, 2011). In 1990, thirty-nine SAF forestry accredited institutions were surveyed throughout North America. The survey revealed that at least fourteen schools were offering a course in agroforestry (Warren & Bentley, 1990). In order to determine the current status of agroforestry course offerings today, we sent an electronic survey to one hundred and twenty seven institutions throughout the U.S. Focusing on land-grant and SAF forestry accredited institutions, the survey findings indicate growth in the number of institutions that are offering agroforestry coursework today. In addition, the number of temperate agroforestry course offerings has increased significantly and may now exceed tropical agroforestry course offerings by institutions in the U.S. The survey results also indicate a thorough adoption of interdisciplinary teaching methods by agroforestry educators. Nonetheless, there is still considerable room for improvement. While most institutions that are currently providing agroforestry courses would like to continue offering them, the number of institutions that have discontinued their offerings since the prior 1988 survey is concerning. In addition, while SAF and 1862 land grant institutions are the strongest proponents of agroforestry, most institutions still do not provide agroforestry courses and are not likely to offer them in the near future. Lack of resources, lack of student interest, and lack of faculty expertise were often cited to this end. A much needed contribution to agroforestry education, this project provides a clearer picture of institutional agroforestry offerings today.
- Agroforestry in the Temperate Landscape: Precedent, Practice, and Design ProposalDarr, Alexander Norton (Virginia Tech, 2019-09-20)Temperate agroforestry systems are an important area of research and practice in Eastern North America with the goal of creating more diverse, productive, and environmentally sound agricultural landscapes by using trees as key crops. There is extensive published research on contemporary temperate agroforestry models as well as tropical indigenous agroforestry systems, but publicly accessible properties that demonstrate these practices are currently limited. These practices, which include: Alley Cropping, Multi-functional Riparian Buffers, Short-rotation coppice, Non-timber forest farming, and novel crop breeding have potential to radically reshape American agricultural practices. As sediment and erosion control becomes stricter in agricultural land, and if future carbon tax or pricing legislation comes into play, non-tillage based agricultural practices will become more prevalent throughout the United States and the rest of the world. In the Mid-Atlantic region of the United States, where this project is based, orchards are a common perennial cropping system, but at present the industry is reliant on chemical inputs that have an economic and ecological cost associated with them. Developing, demonstrating, and popularizing systems that incorporate native, crop-bearing perennials, in a manner that is legible, aesthetically pleasing, and well-integrated into the surrounding topography and agricultural vernacular, this thesis will offer a proof-of-concept to landowners curious about incorporating low-input agroforestry practices. This thesis presents a series of unpublished manuscripts based on research of historical agroforestry practices in temperate North America. These manuscripts focus on agroforestry practices as they were practiced over nearly 500 years of American history. These findings culminate in the proposition of a design for an agroforestry research and demonstration farm in the Mid-Atlantic United States. The goal of this design is to recontextualize a historic dairy farm in Maryland, USA with the construction of a new education, production, and design center. This center, along with its associated infrastructure, the cropping layout, and an interpretive trail through a range of agroforestry systems proposes an immersive environment that allows a visitor to experience agroforestry at its many scales, from garden to wild-land.
- Agroforestry Preferences, Identity, and Collaboration Potential Among CAR Refugees and Host Community CamerooniansMoore, Elizabeth Anderson (Virginia Tech, 2013-08-13)For the past 10 years, thousands of refugees from Central African Republic (CAR) have crossed into Cameroon and settled in villages along the border. Refugee influxes can produce ecological and social challenges to host communities. While conflict is often a result, there is also an opportunity for collaboration and successful integration. Agroforestry, the intentional incorporation and management of trees in agricultural systems, provides a tool that can respond to both social and ecological challenges by providing conservation farming techniques and increasing diversified home production of many needed products. This research sought to understand the needs of community members for specific practices as well as preferences for social implementation of practices, using a frame of identity to help inform on integration and collaboration potential in agricultural projects. The participatory research collected demographic data, employed a 20 point oral questionnaire, and utilized illustrated visual ranking and storytelling tools to gather information on 8 agroforestry practice and implementation preferences, identity, and social arrangement preferences among community members. Agroforestry practices were divided between product-oriented and service-oriented practices. We collected data from 122 individual interviews evenly divided between men and women, and CAR refugees and host community Cameroonians. Results show that there are significant differences in agroforestry practice and implementation preferences across the sample, and between refugees and Cameroonians. Most people felt that refugees and Cameroonians had similar traditions and needs, and that most areas of life should be integrated, however agriculture was an area that the people were more hesitant about mixing, demonstrating that arrangements and implementation of agricultural projects should be carefully designed and executed. Those who preferred mixing of refugees and Cameroonians in fieldwork included members of all demographic groups, signifying the potential for integrated collaboration on community agricultural projects. Results demonstrate that agroforestry projects have the potential to provide important valued resources to communities, create an opportunity for knowledge transfer and improved agricultural systems, and be the scene for positive contact between refugees and Cameroonians, leading to successful integration.
- Behavior and Physiological Responses of Livestock Under Different Grazing SystemsPoudel, Sanjok (Virginia Tech, 2022-04-14)Animal welfare is a major concern among livestock producers in the U.S. Heat stress, particularly, compromises animal welfare and productivity, causing >$2B annual economic loss to producers. The presence of toxic alkaloids within tall fescue (Schedonorus phoenix syn Lolium arundinaceum, syn Festuca arundinacea) plants induces a complex of disorders collectively known as fescue toxicosis. Summer slump, a reduction in animal performance due to heat stress, is common and evident of the symptoms. Various techniques for assessing animal physiological and behavioral responses to heat stress were explored in this dissertation, with particular emphasis on fescue toxicosis and its mitigation strategies. In the first study, the physiological and behavioral responses of heifers was evaluated when grazing either toxic tall fescue with wildtype endophyte (WE) or tall fescue with a novel endophyte (NE). Heifers (n = 24) were assigned to either WE or NE pastures for a 56-d grazing study during the summers of 2020 and 2021. Heifer average daily gain (ADG), intravaginal temperature, and degree of hair shedding were recorded during the grazing period. Blood samples were collected through coccygeal venipuncture and hair was collected from the left rump for cortisol analysis. Ear, tail, and hoof temperatures were collected for each heifer using an infrared thermal imaging camera. In 2020, heifers that grazed NE tall fescue had greater (P = 0.0160) ADG over the season (0.22 vs. 0.12 kg day-1). Hair retention score was greater (P = 0.0029) for heifers that grazed WE tall fescue compared to heifers that grazed NE tall fescue across both years. Heifers that grazed WE tall fescue had decreased ear skin temperature (P = 0.0001), tail skin temperature (P = 0.0058), and hoof surface temperature (P = 0.0075) compared to heifers that grazed NE. Heifers that grazed WE had 0.3-0.9 ºC hotter intravaginal temperatures than heifers that grazed NE, especially during daytime. Hair cortisol levels of heifers that grazed WE tall fescue were greater (P < 0.0001) compared to hair cortisol levels of heifers that grazed NE tall fescue. From 1200h-1700h each day, heifers that grazed WE tall fescue spent 1.5 more (P = 0.0003) hours standing and 0.9 fewer (P = 0.0402) hours lying down compared to heifers that grazed NE tall fescue. These results suggest that heat stress and other physiological changes in heifers grazing WE tall fescue could be mitigated by renovating pastures with NE tall fescue that does not impose any negative effects on grazing animals. The second study explored the potential benefits of consuming condensed tannins as a means of negating the effects of toxic alkaloids in tall fescue. Twelve fall-born steers were assigned to one of the two diet supplement treatments - sericea lespedeza pellets (LES) or sericea lespedeza pellets mixed with polyethylene glycol (LES+PEG) for 12 weeks during the summers of 2020 and 2021. The LES+PEG treatment served as a positive control since polyethylene glycol binds tannins, rendering them inactive in the gastrointestinal system. Animal body weight (BW), hair retention score (HRS), rectal temperature, and thermographic images were collected every 4 weeks. Hair and blood samples were also collected for cortisol analysis. Fecal and urine samples were collected and analyzed for total ergot alkaloid (TEA) concentration. Steers on LES had greater (P = 0.0033) ADG compared to steers on LES+PEG in 2021, but not in 2020 (P = 0.8707). In 2021, HRS was greater (P < 0.05) for steers fed LES+PEG compared to steers fed LES. In 2020, ear skin temperature (P < 0.0001) and hoof surface temperature (P = 0.0382) was greater in steers on LES compared to steers on LES+PEG. Rectal temperatures were lower (P = 0.02905) for steers fed LES compared to steers fed LES+PEG in 2021. Plasma cortisol levels did not differ (P ≥ 0.1566) between LES and LES+PEG treatments for both years. In 2020, hair cortisol levels did not differ (P = 0.8295) between treatments while in 2021, the hair cortisol level of steers on LES+PEG was greater (P = 0.0221) compared to hair cortisol levels of steers on LES. This study indicated some changes in animal physiology in response to dietary supplements containing condensed tannins, but results were inconsistent and further studies are needed to better understand the potential benefits of tannins in reducing the effects of toxic alkaloids consumption. In the third study, behavioral and physiological responses of ewes that grazed either mid-stage hardwood silvopastures or open pasture (OP) were compared. The study site consists of 0.27-ha of black walnut (Juglans nigra; BSP) and honeylocust (Gleditsia triacanthos; HSP) silvopastures and open pasture treatments, each replicated three times. During the summers of 2020 and 2021, thirty-six Katahdin ewes were assigned to one of the treatments for a 6-week summer grazing trial. Ewe weights were recorded for two consecutive days at the beginning and end of the study and intravaginal temperatures were recorded for two consecutive days at every 3-week intervals. Trail cameras captured animal behavior. Blood was collected via jugular venipuncture. Hair grown during the trial was collected from the loin region. Blood and hair cortisol concentrations were determined by ELISA. Ewe ADG was greater in HSP compared to OP (P = 0.0456) but did not differ with BSP (P = 0.4686) across both years. Ewes on OP had hotter (P ≤ 0.0343) intravaginal temperatures than ewes on both silvopasture treatments between 1100h-1700h. Plasma cortisol level was lower in ewes on BSP compared to ewes on OP (P = 0.0400) but did not differ with ewes on HSP (P = 0.6954) across both years. Ewes that grazed OP had greater hair cortisol levels compared to ewes on silvopasture treatments both in 2020 and 2021 (P < 0.0001). In 2020, ewes on BSP spent about 20% more time grazing than ewes on OP (P = 0.0054) while in 2021 ewes on BSP spent about 36% more time grazing than ewes on HSP (P = 0.0014). Ewes on OP spent 400% more time standing than ewes on BSP (P < 0.0001) and 750% more time standing than ewes on HSP (P < 0.0001). Ewe on OP spent 20% less time lying down compared to ewes on BSP (P < 0.0001) and 33% less time lying down compared to ewes on HSP (P < 0.0001). Hair cortisol measures and intravaginal temperature sensors can be utilized as reliable and relatively non-invasive techniques for measuring heat stress response in livestock managed in extensive grazing systems.
- A Biosocial Case Evaluation of Wood Biomass Availability Using Silvicultural Simulations and Owner Intentions on Family Forests in Virginia and North CarolinaBrinckman, Matthew Douglas (Virginia Tech, 2010-05-17)Interest in wood-based bio-energy systems in the United States is increasing and may play a part in future renewable energy initiatives (Dincer 2000). Family forests have potential to play an important role in supplying wood biomass for energy production. However, access depends mostly on the management intentions among family forest owners. Enhanced biomass markets in regions where family forest ownership dominates could increase productivity by reinvigorating the low-value merchandizing required to accomplish silvicultural objectives. Given diverse owner objectives and forest types on family forests, estimates of biomass availability must include both biophysical and social aspects of procurable feedstock. This thesis chronicles a biosocial case study that estimates potential biomass supply from 51 family forests in Virginia and North Carolina. The study occurred within a woodshed centered on the future site of an impending ethanol plant in Mecklenburg County, Virginia. A survey instrument using the theory of planned behavior was used to measure ownership characteristics and intention to harvest. Forest attributes were collected during property visits to estimate potential yields resulting from silvicultural simulations. Results reveal that forest cover-type and tree size significantly affect owner intentions to harvest and owner attitudes toward harvesting partially mediate this relationship. Outputs from silvicultural simulations correspond with those made using Forest Inventory and Analysis data within the study region. Disproportionality was examined by coupling social and biological drivers of sustainable wood biomass availability. Implications of the research include refined estimates of potential supply and demonstrating a multi-scalar, mixed-method approach for assessing wood biomass availability.
- Characteristics and Perceptions of Cost-share Funding for Emerald Ash Borer Mitigation in Virginia Urban AreasStewart, Peter William (Virginia Tech, 2019-06-19)Since most invasive forest pests first establish in urban areas, detection and containment of these pests within cities is important to the health of all forests. While the emerald ash borer (EAB) (Agrilus planipennis Fairmaire) has proved difficult to contain, efforts continue to mitigate the impacts of its spread. As part of those efforts, the Virginia Department of Forestry (VDOF) initiated its Emerald Ash Borer Treatment Program (EABTP) in 2018, providing financial incentives for insecticidal protection of ash trees. To better understand the role of incentives in promoting urban forest health, I conducted a study of properties, households, and practitioners involved in the program's first year. To examine where EABTP funding helped pay for tree protection, I conducted tree inventories on 16 urban participant properties. Concurrently with tree inventory work, I conducted web and mail surveys to examine homeowner engagement in preservation of threatened trees. Finally, to investigate the role of forest practitioners involved in program implementation, I conducted web surveys of VDOF foresters and Virginia arborists. Results demonstrated that on urban participant properties—typically large and wooded—white ash (Fraxinus americana) was the dominant species. Results from homeowner surveys demonstrated broad support for personal investment in tree preservation, and the significance of attitudinal predictors towards those intentions. Results from practitioner surveys demonstrated substantial, though not unanimous, support for the program as a benefit both to clients and forests. Implications of these findings are discussed in the context of future urban forest health initiatives.
- Characteristics of Logging Businesses across Virginia’s Diverse Physiographic RegionsBarrett, Scott M.; Bolding, M. Chad; Munsell, John F. (MDPI, 2017-11-28)Logging businesses play an important role in implementing forest management plans and delivering the raw material needed by forest products mills. Understanding the characteristics of the logging workforce can help forest managers make better decisions related to harvesting operations. We surveyed logging business owners across Virginia’s three physiographic regions (Mountains, Piedmont, and Coastal Plain). Overall, logging businesses reported an average production rate of 761.37 t/business/week, but this varied substantially by region, with the highest production rates in the Coastal Plain (1403.55 t/business/week), followed by the Piedmont (824.69 t/business/week) and the Mountains (245.42 t/business/week). Many operations in the Mountains rely primarily on manual felling (66.6% of respondents) and these operations often have lower production rates. Across all regions, 81.7% of reported production came from operations that primarily utilized rubber-tired feller-bunchers for felling. Logging businesses were sorted based on reported production capacity and then divided into three groups (high, medium, and low production) based on total reported production. Across all regions, the majority of reported production was produced by the high production logging businesses. This was highest in the Piedmont, where the high production businesses accounted for 74.8% of total reported production.
- Characterization and communicative analysis of wildlife managers and recreational users of Virginiaâ s Wildlife Management AreasCarrozzino-Lyon, Amy L. (Virginia Tech, 2012-05-01)The Virginia Department of Game and Inland Fisheries (VDGIF) manages wildlife management areas (WMAs) to provide wildlife habitat and hunting and fishing opportunities, along with opportunities for compatible wildlife-related recreation. Despite having responsibility for managing 39 WMAs, comprising more than 200,000 acres, VDGIF had only anecdotal information about who recreated on Virginia's WMAs, to what extent, and how they felt about management of the WMAs. My goals were to (1) determine the types and amount of recreational use WMAs receive, (2) describe and compare VDGIF managers' and WMA users' current attitudes and perceptions toward land management, and (3) determine if a methods bias existed between surveys administered online and through U.S. mail. I observed diverse recreational use totaling > 90,000 annual recreational user days on the 10 WMAs included in the study. Most visitors were satisfied with their visit, agreed with the use of most land management practices presented, and were willing to continue to visit a WMA if an annual fee was imposed. Co-orientation analysis revealed low agreement and low accuracy, suggesting a need to improve awareness and recognition of managers' and stakeholders' attitudes toward land management. Addressing areas where agreement already exists, but may not be recognized, should be a top priority. Areas of greater disparity will prove difficult to address, but attention is critical to successfully implement WMA management objectives. Wildlife value orientations differed between VDGIF managers and WMA users; VDGIF personnel were predominantly Utilitarian (54%, n=35), whereas WMA users were predominantly Pluralist (63%, n=381). Value orientations did not relate strongly to opinions of land management. Demographics differed between web and paper respondents, with slightly younger, more urban and more educated respondents electing to complete the web-based survey more often. Value orientations toward wildlife and attitudes toward land management did not differ between web and paper respondents, suggesting little influence of values and attitudes on the survey mode selected. Increasingly diverse stakeholders and limited funding sources continue to challenge state wildlife agencies. Specific engagement techniques should strengthen interpersonal relationships and collaboration between the agency and its stakeholders.
- Commercial Chinese Chestnut Production in VirginiaCommender, Katie E.; Munsell, John F.; Ares, Adrian (Virginia Cooperative Extension, 2017-09-21)Discusses the production of Chinese Chestnut (Castanea mollissima) in Virginia, specifically site selection and preparation, orchard spacing, cultivars, fertilization, pruning, weed and pest control, harvesting and more.
- Creating silvopastures – Some considerations when planting trees into pasturesFike, John H.; Downing, Adam K.; Munsell, John F.; Frey, Gregory E.; Mercier, Kelly; Pent, Gabriel J.; Teutsch, Christopher D.; Daniel, J. B.; Fisher, K. Jason; Adams, Miller; Groh, Todd (Virginia Cooperative Extension, 2017)Silvopastures — integrated tree-forage-livestock production systems — have the potential to boost farm resource use and income. These systems take advantage of the beneficial interactions among system components, add biodiversity, and increase animal comfort. The intentional and careful combining of trees and livestock in time and space can yield both short-and long-term returns and have positive environmental outcomes. In well-managed silvopasture systems, trees can reduce livestock stress by protecting them from inclement weather or by reducing ambient temperatures and radiation. They can provide marketable timber and nontimber products and improve environmental quality by reducing water runoff and capturing nutrients and by reducing animal use of surface waters.
- Creating Silvopastures: Some Considerations When Thinning Existing Timber StandsFike, John H.; Downing, Adam K.; Munsell, John F.; Daniel, J. B.; Teutsch, Christopher D.; Mercier, Kelly; Pent, Gabriel J. (Virginia Cooperative Extension, 2016-09-30)Discusses the concept of silvopastures, the inclusion of trees with forage and livestock production in a rotational grazing system. This system can improve forage production, animal comfort, increase farm resource use efficiency, increase farm income, and reduce environmental costs. This system is also more sustainable.
- Defining Silvopastures: Integrating Tree Production With Forage-Livestock Systems for Economic, Environmental, and Aesthetic OutcomesFike, John H.; Downing, Adam K.; Munsell, John F. (Virginia Cooperative Extension, 2016-05-23)Introduces the concept of "silvopasture", and notes the advantages of this means of land management, including improvements in environment, monies, and aesthetics.
- Describing Medicinal Non-Timber Forest Product Trade in Eastern Deciduous Forests of the United StatesKruger, Steve D.; Munsell, John F.; Chamberlain, James L.; Davis, Jeanine M.; Huish, Ryan D. (MDPI, 2020-04-12)Eastern deciduous forests in the United States have supplied marketable non-timber forest products (NTFP) since the 18th century. However, trade is still largely informal, and the market scope and structure are not well understood. One exception is American ginseng (Panax quinquefolius L.). Ginseng’s legal status as a threatened species requires that buyers apply for a license and keep sales records that are submitted to a state authority. Other marketable medicinal plants collected from the same forests, known colloquially as ‘off-roots’, are not similarly tracked. To study the characteristics of off-root trade in the eastern deciduous forests of the United States, registered ginseng buyers in 15 eastern states were surveyed in 2015 and 2016 about business attributes, purchase volume, and harvest distribution for 15 off-root species selected for their economic and conservation value. Buyers voluntarily reported harvesting 47 additional NTFP species. The most frequently purchased off-root species were the roots and rhizomes of two perennial understory plants: black cohosh (Actaea racemosa L.) and goldenseal (Hydrastis canadensis L.). Survey data were used to develop a buyer typology and describe the off-root market structure and material sourcing. The buyer typology included four distinct categories: side or specialty (small); seasonal venture (medium); large integrated or dedicated business (large); and dedicated bulk enterprise (regional aggregator). Market activity was mapped across the study area, demonstrating that most off-root trade is concentrated in central Appalachia, an area with extensive forests and a struggling economy. Study methods and data improve non-timber forest product market insights, are useful for forest management, and can support efforts to advance sustainable NTFP supply chains.
- Developing Production Techniques and A Site Assessment Tool for Forest Farmed Ramps in AppalachiaAryal, Pabitra (Virginia Tech, 2023-06-23)The Allium tricoccum Aiton (ramps, aka wild leeks), a native spring ephemeral, is a cultural keystone species in Appalachia, a mountainous physiographic region encompassing 205,000 square miles of the eastern United States. People in Appalachia have long harvested ramps in the wild. However, growing demand for the plant in and outside the region has increased harvesting, resulting in threats to native populations. Agroforestry cultivation techniques and technical support for sustained-yield forest farming practices are needed to conserve ramps and meet increasing demand. Various techniques for assessing suitable production practices for ramps were explored in this dissertation, particularly examining best-suited ramp ecotypes, mycorrhizal treatment, and habitat suitability determination. In the first study, bulbs and seeds from diverse Appalachian locations were gathered and transplanted to a common experimental site to investigate the effects of different ramp ecotypes on growth, survival, and stress responses. Plant characteristics and stress measurements were recorded before transplantation and post-transplantation assessments. Specifically, the study investigated the germination rate of three ramp seed ecotypes and the growth, survival, and stress responses of eight native ramp bulb ecotypes and three commercially obtained seedling samples. Results indicated that above-ground growth, survival, and stress response on the ramp ecotypes differed significantly. The second study explored the impact of mycorrhizae on ramps and was evaluated by assessing the impact of Arbuscular Mycorrhizal Fungi (AMF) inoculation on Allium tricoccum. Four measurements, collectively referred to as parameter categories, were assessed. These included measures of 1) above-ground plant growth: leaf length, and leaf width; 2) stress measurement: transplant stress after a few days of transplant, and photosynthetic performance stress after a year of transplant; 3) survival analysis; and 4) mycorrhizal colonization rate. For each parameter category, three treatment comparison categories were conducted: 1) Positive control treatments: bulbs were planted from their native environment without treatment; 2) Negative controls: bulbs were treated with fungicide before planting to eradicate existing AMF in roots; and 3) The test group: bulbs were inoculated with commercial AMF (Atriva 500). Results indicated that mycorrhizal inoculation could increase ramp leaf length (P≤0.03). However, the impact varied by ecotype, highlighting the importance of considering local environmental conditions and ramp ecotype. Mycorrhizal inoculation did not impact ramp growth at the seedling stage. Mycorrhizal treatment increased the transplanted ramp's survival and stress tolerance (P≤0.001). The third study used multi-criteria decision-making (MCDM), the Analytic Hierarchical Process (AHP), and weighted linear combinations to model suitable habitats for ramps production. Ten habitat criteria were chosen (including five soil properties, three topographic parameters, and two land use properties) to assess the potential for growing ramps in seven counties in Virginia, West Virginia, Pennsylvania, and North Carolina. The percentage of highly suitable areas for ramps production in the studied counties ranges from 21.5% in Haywood County to 49.6% in Macon County. Similarly, moderately suitable areas range from 36.7% in Macon County to 54.5% in Lawrence County. Ground truthing was performed to validate the model. Ramp patch locations within each county were geocoded in the final suitability maps. Existing ramp patches were within the model's estimate of moderate to high site suitability ranges, suggesting the model is valid. Results of the study suggest that site suitability modeling could be useful for producers interested in growing ramps in forest farm settings across Appalachia.
- Edible Green Infrastructure in the United States: Policy at the Municipal LevelCoffey, Sarah E. (Virginia Tech, 2020-05-08)Urbanization can negatively affect the capacity of ecosystems to provide services that support human life. Edible green infrastructure (EGI) can increase cultural and environmental services in urban and peri-urban communities. Instrumental in the use of EGI are local governments, who are in a position to pass supportive policies. For this research, we completed a qualitative study of EGI policy processes in U.S. cities and a mixed-methods study of EGI challenges and opportunities in small towns. Our first objective was to understand how and why EGI policy develops. We interviewed twelve policy actors from six U.S. cities that have formalized EGI ordinances. Major drivers of EGI policy were: 1) improving public health; 2) securing land tenure; 3) managing vacant lands; 4) accommodating for population growth; and 5) the local food movement. Common policymaking steps included: 1) local communities initiate EGI policy process; 2) city governments respond by working with communities to draft EGI ordinances; 3) abrupt changes to land use policies result in a policy image supportive of EGI as a public land management strategy; and 4) during emergence of the new land use paradigm, incremental changes reinforce this image. We also learned how certain challenges and policy actor recommendations for minimizing obstacles affect the policy process. Our second objective was to understand EGI adoption in small towns. We surveyed 68 mayors of small towns (<25,000) in Virginia to study local leader perspectives regarding implementation and policy. The greatest perceived barrier to EGI adoption was long-term maintenance, whereas opportunities included civic benefits such as education and community-building. Most towns had not intentionally used EGI on public land, nor did they have compatible land use codes. Open-ended responses suggest that mayors have different views about the role policy should play in EGI adoption. We used mayoral perceptions about the constituent support for public green space, the implementation of edible woody perennial species, and available public space for EGI to group towns into unique types. Four groups were identified in a K-means cluster analysis: 1) Ambivalent and Resource-Poor; 2) Optimistic and Capable; 3) Doubtful and Unsupported; and 4) Unsure with Potential. One-way ANOVA and Tukey's HSD post-hoc analysis (α=0.05) showed that Optimistic and Capable were significantly more likely than Doubtful and Unsupported to intend to plant EGI and benefit from government support for edible, woody perennials on public land. EGI may be more practical for towns with greater backing for public green space, more available land, and higher rates of favorable attitudes.
- Effect of silvopasture system on fearfulness and leg health in fast-growing broiler chickensPaneru, Bidur; Pent, Gabriel J.; Nastasi, Shawna; Downing, Adam K.; Munsell, John F.; Fike, John H.; Jacobs, Leonie (2023-02)A silvopasture system intentionally integrates trees, forages, and livestock, allowing dual land use. These systems can provide high-quality habitat for broiler chickens; however, such systems have not been widely adopted by the broiler industry in the United States. The objective of this study was to examine the effect of silvopasture versus open pasture access on fearfulness and leg health in fast-growing broiler chickens. A total of 886 mixed-sex Ross 708 chicks in Experiment 1 (Exp 1) and 648 chicks in Experiment 2 (Exp 2) were housed in coops and had access to 16 (Exp 1) or 12 (Exp 2) 125m2 silvopasture plots (x̄ = 32% canopy cover) or open pasture plots (no canopy cover) from day 24 of age. Fearfulness was measured using a tonic immobility test (tonic immobility duration), and leg health was assessed by quantifying footpad dermatitis, hock burns, gait, and performing a latency-to-lie test on days 37-39 of age. Birds in the silvopasture treatment were less fearful than birds in the open pasture treatment. Overall, birds in both silvopasture and open pasture systems had excellent leg health. Silvopasture birds had lower footpad dermatitis scores than open pasture birds. Silvopasture birds tended to have worse gait than open pasture birds in Exp 1, but not in Exp 2. Hock burn scores and latency-to-lie did not differ between treatments in Exp 1 or Exp 2. Raising birds in silvopasture reduced fear and improved footpad health compared to birds raised in open pastures, which indicates that silvopasture systems provide some benefits for affective state and leg health in fast-growing broilers.
- Effectiveness of State Developed and Implemented Forestry Best Management Practices in the United StatesCristan, Richard (Virginia Tech, 2016-06-28)The passage of the Federal Water Pollution Control Act of 1972 required states to develop forestry BMPs to help reduce potential nonpoint source pollution from forest operations. Properly applied forestry best management practices (BMPs) have since been proven to protect water quality from forest operations. This research project reviewed BMP effectiveness studies in the U.S., assessed current state developed and implemented of forestry BMPs, and developed a simple method to estimate potential erosion from forest operations for the Piedmont physiographic region based on previous studies. Eighty-one BMP effectiveness studies were reviewed. The review of past effectiveness studies indicates that water quality protection is increased when BMPs are implemented correctly. These effectiveness studies provide states with valuable information on how their BMP guidelines are achieving the goals defined by the Federal Water Pollution Control Act. Every U.S. state has forestry BMP guidelines. These guidelines may be non-regulatory, quasi-regulatory, or regulatory depending on the state. Twenty states reported implementing non-regulatory BMP guidelines, 19 quasi-regulatory BMP guidelines, and 11 regulatory BMP guidelines. State forestry agencies were reported as being the lead agency responsible for BMP monitoring in 35 states. The national forestry BMP implementation rate was 91% (32 states). However, states did report deficiencies for specific BMP guideline categories. Supplementary to the reviewed BMP effectiveness studies, forest erosion studies in the southeastern U.S. that quantified erosion rates from forest operations were also reviewed. Erosion rates obtained from the literature were reviewed by operation categories (timber harvesting, forest roads, skid trails, log landings, stream crossings, and streamside management zones) and physiographic region (Mountains, Piedmont, Gulf Coastal Plain, and Atlantic Coastal Plain). There were numerous research gaps regarding erosion rates from forest operations for all the regions except the Piedmont region. The Piedmont region was selected for developing a method to estimate potential erosion from forest operations. This erosion estimation method is a quick and potentially useful tool for estimating potential erosion; however, it is based on limited data from the Piedmont region only. The basic method approach might be considered for the other physiographic regions, but further research is needed to fill current knowledge gaps.
- The Effects of Cost-Share Participant Experience on Forest Buffer RetentionCommender, Katie E.; Munsell, John F.; Ares, Adrian; Sullivan, Jay; Chamberlain, James L. (2020-09)Forest conservation buffers provide ecosystem services such as soil and water conservation, wildlife habitat, and clean air. This research studied the experiences and intentions of participants in forest buffer contract programs in Virginia, USA provided by governmental conservation agencies. These programs offer technical assistance and share costs of establishment and maintenance for a period of time typically between 2 and 15 years. Program participant reflections about their experience and intention to retain their forest buffer after their cost-share contract ends were measured. Two-hundred and fifty-one program participants received a mail survey and 136 were returned (response rate = 54%). Two-step cluster analysis grouped respondents into four participant types based on responses to questions about buffer maintenance and costs, and perceived environmental benefits. Discontented and Doubtful respondents (23.4%) experienced financial and maintenance challenges. They also were doubtful about environmental benefits. Contented and Confident respondents (28.2%) experienced minimal financial and maintenance difficulties, and were confident that their buffers provide environmental benefits. Benefited with Burden respondents (22.6%) also were confident about environmental benefits, but experienced burdensome maintenance and costs. Skeptical without Strife respondents (25.8%) were not convinced their buffers provide environmental benefits, but have not had problems with maintenance or costs. A Kruskal-Wallis non-parametric test (alpha = 0.05) indicated that Discontented and Doubtful respondents are least likely to retain their buffer after their cost-share contract expires (rank sum = 42.2) and Contented and Confident are most likely (rank sum = 82.8). Benefited with Burden and Skeptical without Strife respondents (rank sum = 59.7 and = 59.8, respectively) were statistically similar to their Discontented and Doubtful counterparts, but slightly more likely to keep their buffer after their contract expires. Overall, Discontented and Doubtful and Benefited with Burden respondents had larger parcels of land and represented the largest percentage of full-time farmers, whereas Contented and Confident and Skeptical without Strife respondents had smaller parcels and were most likely to be part-time farmers or female. Findings suggest distinctions between types are clear along the onus of management, not necessarily perspectives on conservation. The two most influential drivers of program participation were cost-share assistance and water quality, whereas their most important management objective was improving land health.
- Factors Affecting the Adoption and Retention of Conservation BuffersCommender, Katie Elene (Virginia Tech, 2016-06-03)Despite the numerous environmental benefits of conservation buffers and incentives offered by cost-share programs, adoption remains low. Typical buffer designs often take arable land out of production. Multifunctional conservation buffers (MCBs) offer an alternative that supports rather than excludes production. By incorporating non-timber forest products (NTFPs), edible or ornamental crops can be harvested for profit or home use, while retaining key environmental services. Beyond low adoption rates, little is known about the long-term retention of conservation buffers due in part to limited program evaluation funding. However, implementation of evaluation recommendations is imperative for buffer retention. With this in mind, we administered a mail survey to conservation buffer adopters throughout Virginia. The first objective was to evaluate post-adoption experiences with conservation buffers. We identified four landowner clusters with distinct differences in buffer perceptions and intentions to retain. Insights can help conservation agencies enhance programming to reduce negative buffer experiences and increase long-term retention. The second objective was to determine interest in and preferences for MCBs. We found respondents were somewhat to very interested in MCBs, and increases in this interest were influenced most by the buffer's potential to decrease soil loss. Respondents who found MCBs more appealing than traditional designs had supportive peers and higher expectations of MCB performance. Lastly, respondents preferred MCBs designed with nut or fruit producing trees that grow naturally. Findings can help inform future outreach and programming aimed at merging conservation and production in buffer zones.