Browsing by Author "Okeyo, Jeremiah M."
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- Conservation agriculture for smallholder farms in Eastern Uganda and Western KenyaNorton, James B.; Omondi, Emmanuel C.; Norton, Urszula; Ngosia, D. S.; Odhiambo, J. A.; Okeyo, Jeremiah M.; Okalebo, J. R.; Oluko, P. S. (2012)Soil quality and crop yield parameters resulting from conservation agriculture practices were evaluated in on-station and on-farm studies established in two highland sites and two lowland sites in the Mount Elgon region of western Kenya and eastern Uganda. Each of the four study areas consists of an on-station and four on-farm sites, each with of three tillage practices (conventional moldboard, no-till, and minimum till); two levels of nitrogen fertilizer (60 Kg N Ha-1 and none); and three cropping systems (traditional maize-beans intercropping, maize intercropped with a bean-Mucuna [Mucuna pruriens] relay, and strip intercropping with maize, beans, and Mucuna in rotation planted in four-row strips) in a factorial design with nine treatments. First and second year results of soil organic matter analyses and crop yields indicate that reduced tillage combined with adding the cover crop to the rotation has begun to improve soil quality and has not negatively impacted yields. Some cooperating farmers have noted improved maize yields following Mucuna and are eager to scale up reduced-tillage and cover crop treatments.
- Impact of conservation tillage on soil quality under smallholder farming systems in eastern Uganda and western KenyaOkeyo, Jeremiah M.; Norton, Jay B.; Omondi, Emmanuel C.; Norton, Urszula; Ngosia, Dominic S.; Odhiambo, Judith A.; Ashilenje, Dennis S. (2014)This poster presents a study to evaluate the impact oftillage: conventional tillage (CT), minimum tillage (MT) and notill(NT) combined with 3 cropping systems: intercrop, relay andstrip system on: (i.) Total and labile SOC and N pools and (ii.) Bulk density (BD), penetration resistance (PR) and water in eastern Uganda and western Kenya.
- Seasonal Variability in GHG emissions and soil N in maize/common bean intercropping under inversion-type tillage in western KenyaOdhiambo, Judith A.; Norton, Urszula; Norton, Jay B.; Omondi, Emmanuel C.; Okeyo, Jeremiah M.; Ngosia, Dominic S.; Ashilenje, Dennis S. (2014)This posters reports on a study which seeks to (1) Assess SOM mineralization in typical maize bean production during long rainy season, short rainy season and a fallow period in double
- Soil biological and physical properties under conservation agriculture in Kenya and UgandaNorton, Jay B.; Okeyo, Jeremiah M.; Norton, Urszula (2014)This presentation describes a study conducted by the East Africa SANREM team which examines the following questions: (1) How do alternative tillage treatments that eliminate plows impact soil quality? (2)How do alternative cropping systems that include cover crops impact soil quality? (3) How do combined alternative cropping and tillage systems affect soil quality?