Laboratory measurements and modeling N mineralization potential in Virginia Coastal Plain agricultural, fallow, and forest soils

Simple item page
dc.contributorVirginia Techen
dc.contributor.authorShukla, S.en
dc.contributor.authorMostaghimi, Saieden
dc.contributor.authorBurger, James A.en
dc.contributor.departmentBiological Systems Engineeringen
dc.contributor.departmentForest Resources and Environmental Conservationen
dc.coverage.countryUnited Statesen
dc.coverage.stateVirginiaen
dc.date.accessed2014-05-29en
dc.date.accessioned2014-05-30T13:13:50Zen
dc.date.available2014-05-30T13:13:50Zen
dc.date.issued2000en
dc.description.abstractA long-term aerobic incubation and leaching technique was used to measure N mineralization of surface and subsurface soils (sandy loam) from agricultural,forest, and fallow sites in a Virginia Coastal Plain watershed. N mineralization potential was measured to refine models used to describe this process in a watershed-scale nutrient export assessment. Potentially mineralizable N (N-0) and reaction rate constants (k) were estimated using a first-order model and a nonlinear regression procedure. Large variations in cumulative N mineralized, N-0, and k, were found for the surface soils from agricultural areas. Forest soils had much higher potentially mineralizable N than agricultural soils. For subsurface soils, the differences among land uses were less variable than those observed for the surface soils. The first order model (single-pool approach) was adequate for predicting N mineralization in surface soils from agricultural and fallow areas, but less suitable for forest surface soils. Consideration of a double exponential (two-pool approach) model did not improve the performance of N mineralization prediction for forested or agricultural soils. Large variations occurred in the field-predicted values of mineralized N due to temperature and moisture ranges commonly occurring throughout the season. Variability in the N mineralization potential of soils in the watershed suggests that individual k and N-0 should be derived for soils with similar properties to obtain better predictions of N mineralization and thus N movement to groundwater.en
dc.description.sponsorshipUnited States Geological Survey (USGS)en
dc.description.sponsorshipVirginia Department of Conservation and Recreation, Division of Soil and Water Conservationen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationShukla, S.; Mostaghimi, S.; Burger, J. A., "Laboratory measurements and modeling N mineralization potential in Virginia Coastal Plain agricultural, fallow, and forest soils," Transactions of the ASAE. VOL. 43(2): 315-325. (doi: 10.13031/2013.2707) @2000en
dc.identifier.doihttps://doi.org/10.13031/2013.2707en
dc.identifier.issn0001-2351en
dc.identifier.urihttp://hdl.handle.net/10919/48217en
dc.identifier.urlhttp://elibrary.asabe.org/abstract.asp?aid=2707&t=3&dabs=Y&redir=&redirType=en
dc.language.isoenen
dc.publisherAmerican Society of Agricultural and Biological Engineersen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectOrganic Nen
dc.subjectInorganic Nen
dc.subjectModelen
dc.subjectLand useen
dc.subjectNitrogen mineralizationen
dc.subjectTemperatureen
dc.subjectMoistureen
dc.subjectAgricultural engineeringen
dc.titleLaboratory measurements and modeling N mineralization potential in Virginia Coastal Plain agricultural, fallow, and forest soilsen
dc.title.serialTransactions of the ASAEen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
p315-325.pdf
Size:
162.68 KB
Format:
Adobe Portable Document Format
Description:
Main article
Download

Collections

Scholarly Works, Forest Resources and Environmental Conservation
Scholarly Works, Biological Systems Engineering