selected publications
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article
- Maize productivity dynamics in response to mineral nutrient additions and legacy organic soil inputs of contrasting quality. Field Crops Research. 188:113-120. 2016
- Effect of reduced tillage and mineral fertilizer application on maize and soybean productivity. Experimental Agriculture. 48:159-175. 2012
- Cropping Systems in the Sudano-Sahelian Zone: Implications on Soil Fertility Management over Varied Seasons 2012
- Long-term soil quality degradation along a cultivation chronosequence in western Kenya. AGRICULTURE ECOSYSTEMS & ENVIRONMENT. 141:86-99. 2011
- Comparative Analysis of the Current and Potential Role of Legumes in Integrated Soil Fertility Management in East Africa 2011
- Strategic phosphorus application in legume-cereal rotations increases land productivity and profitability in Western Kenya. Experimental Agriculture. 46:35-52. 2010
- Soil organic C stabilization and thresholds in C saturation.. Soil Biology & Biochemistry. 41:2100-2104. 2009
- Reversibility of Soil Productivity Decline with Organic Matter of Differing Quality Along a Degradation Gradient. Ecosystems. 11:726-739. 2008
- Integrated Nutrient Management: Concepts and Experiencefrom Sub-Saharan Africa 2008
- Soil organic carbon dynamics, functions and management in West African agro-ecosystems. Agricultural Systems. 94:13-25. 2007
- Partial balance of nitrogen in a maize cropping system in humic nitisol of Central Kenya. Nutrient Cycling in Agroecosystems. 76:261-270. 2007
- Farming in the drylands of West Africa: promising soil fertility restoration technologies 2004
- Nitrogen fertilizer equivalencies of organics of differing quality and optimum combination with inorganic nitrogen source in Central Kenya. Nutrient Cycling in Agroecosystems. 68:127-135. 2004
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