selected publications
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article
- Altitude and management affect soil fertility, leaf nutrient status and Xanthomonas wilt prevalence in enset gardens. SOIL. 7:1-14. 2021
- Combining organic and mineral fertilizers as a climate-smart integrated soil fertility management practice in sub-Saharan Africa: A meta-analysis. PLOS ONE. 15. 2020
- Phenotyping Root Architecture of Soil-Grown Rice: A Robust Protocol Combining Manual Practices with Image-based Analyses.. bioRxiv. 2020
- The soil fertility and leaf nutrient status in enset gardens in different altitude zones of the Gamo highlands, Ethiopia and inferences for Xanthomonas wilt prevalence 2019
- Anatomical root responses of rice to combined phosphorus and water stress – relations to tolerance and breeding opportunities. Functional Plant Biology. 46:1009-1022. 2019
- Balanced nutrient requirements for maize in the Northern Nigerian Savanna: Parameterization and validation of QUEFTS model. Field Crops Research. 241:107585. 2019
- Combining phosphorus placement and water saving technologies enhances rice production in phosphorus-deficient lowlands. Field Crops Research. 236:177-189. 2019
- Architectural Root Responses of Rice to Reduced Water Availability Can Overcome Phosphorus Stress. AGRONOMY-BASEL. 9. 2019
- Responses of cassava growth and yield to leaf harvesting frequency and NPK fertilizer in South Kivu, Democratic Republic of Congo. Field Crops Research. 214:194-201. 2017
- Profitability of diammonium phosphate use in bush and climbing bean-maize rotations in smallholder farms of Central Burundi. Field Crops Research. 212:52-60. 2017
- Soil fertility gradients and production constraints for coffee and banana on volcanic mountain slopes in the East African Rift: A case study of Mt. Elgon. AGRICULTURE ECOSYSTEMS & ENVIRONMENT. 231:166-175. 2016
- Phosphorus in smallholder farming systems of sub-Saharan Africa: implications for agricultural intensification. Nutrient Cycling in Agroecosystems. 104:321-340. 2016
- Seed weight affects shoot and root growth among and within soybean genotypes beyond the seedling stage: implications for low P tolerance screening. Plant and Soil. 401:65-78. 2016
- Ex ante appraisal of agricultural research and extension A choice experiment on climbing beans in Burundi. Outlook on Agriculture. 44:61-67. 2015
- Integrated soil fertility management in sub-Saharan Africa: unravelling local adaptation. SOIL. 1:491-508. 2015
- Understanding the Process of Agricultural Technology Adoption: Mineral Fertilizer in Eastern DR Congo. World Development. 59:132-146. 2014
- Enhancing Maize Productivity and Profitability Using Organic Inputs and Mineral Fertilizer in Central Kenya Small-Hold Farms. Experimental Agriculture. 50:250-269. 2014
- Residual phosphorus effects and nitrogen × phosphorus interactions in soybean–maize rotations on a P-deficient Ferralsol. Nutrient Cycling in Agroecosystems. 98:187-201. 2014
- Root hairs explain P uptake efficiency of soybean genotypes grown in a P-deficient Ferralsol. Plant and Soil. 369:269-282. 2013
- CIALCA interventions for productivity increase of cropping system components in the African Great Lakes zone 2013
- Partial substitution of phosphorus fertiliser by farmyard manure and its localised application increases agronomic efficiency and profitability of maize production. Field Crops Research. 140:32-43. 2013
- The performance of DGT versus conventional soil phosphorus tests in tropical soils - An isotope dilution study. Plant and Soil. 359:267-279. 2012
- Combining Mineral Fertilizer and Green Manure for Increased, Profitable Cassava Production. Agronomy Journal. 104:178-187. 2012
- Long-term integrated soil fertility management in South-western Nigeria: Crop performance and impact on the soil fertility status. Plant and Soil. 273:337-354. 2012
- Dissemination of Integrated Soil Fertility Management Technologies Using Participatory Approaches in the Central Highlands of Kenya 2011
- Effect of Organic Inputs and Mineral Fertilizer on Maize Yield in a Ferralsol and a Nitisol Soil in Central Kenya 2011
- Increasing Productivity Through Maize–Legume Intercropping in Central Kenya 2011
- Interaction Between Resource Quality, Aggregate Turnover, Carbon and Nitrogen Cycling in the Central Highlands of Kenya 2011
- A staggered maize-legume intercrop arrangement robustly increases crop yields and economic returns in the highlands of Central Kenya.. Field Crops Research. 115:132-139. 2010
- Integrated soil fertility management Operational definition and consequences for implementation and dissemination. Outlook on Agriculture. 39:17-24. 2010
- Reducing labour and input costs in soybean production by smallholder farmers in south-western Kenya. Field Crops Research. 117:70-80. 2010
- Assessment of nutrient deficiencies in maize in nutrient omission trials and long-term field experiments in the West African Savanna. Plant and Soil. 314:143-157. 2009
- Determinants of the decision to adopt integrated soil fertility management practices by smallholder farmers in the central highlands of Kenya. Experimental Agriculture. 45:61-75. 2009
- Plant age and rock phosphate effects on the organic resource quality of herbaceous legume residues and their N and P release dynamics. Agronomy for Sustainable Development. 28:429-437. 2008
- Does the enhanced P acquisition by maize following legumes in a rotation result from improved soil P availability. Soil Biology & Biochemistry. 39:2555-2566. 2007
- Does the enhanced P acquisition by maize following legumes in a rotation result from improved soil P availability? 2007
- Differential 13C isotopic discrimination in maize at varying water stress and at low to high nitrogen availability. Plant and Soil. 282:313-326. 2006
- Mineralization of sulfur from organic residues assessed by inverse isotope dilution. Soil Biology & Biochemistry. 38:2278-2284. 2006
- Plant-available P for Maize and Cowpea in P-deficient Soils from the Nigerian Northern Guinea Savanna – Comparison of E- and L-values. Plant and Soil. 283:251-264. 2006
- Carbon and nitrogen dynamics in a phosphorus deficient soil amended with organic residues and fertilizers in western Kenya 2005
- Long-term soil organic carbon dynamics in a subhumid tropical climate: 13C data in mixed C3/C4 cropping and modeling with ROTHC. Soil Biology & Biochemistry. 36:1739-1750. 2004
- A New Method for the Simultaneous Measurement of pH‐Dependent Cation Exchange Capacity and pH Buffering Capacity. Soil Science Society of America Journal. 68:1578-1585. 2004
- Assessment of labile phosphorus fractions and adsorption characteristics in relation to soil properties of West African savanna soils. AGRICULTURE ECOSYSTEMS & ENVIRONMENT. 100:285-294. 2003
- Balanced nutrient management systems for cropping systems in the tropics, from concept to practice. Agriculture, Ecosystems & Environment. 100:99-102. 2003
- Cation exchange capacities of soil organic matter fractions in a Ferric Lixisol with different organic matter inputs. Agriculture, Ecosystems & Environment. 100:161-171. 2003
- Fertility status of soils of the derived savanna and northern guinea savanna and response to major plant nutrients, as influenced by soil type and land use management. Nutrient Cycling in Agroecosystems. 62:139-150. 2002
- Options for increasing P availability from low reactive rock phosphate 2002
- Root distribution of Senna siamea grown on a series of derived-savanna-zone soils in Togo, West Africa. Agroforestry Systems. 54:1-12. 2002
- Maize Yield as Affected by Organic Inputs and Urea in the West African Moist Savanna. Agronomy Journal. 93:1191-1199. 2001
- Temporal variations in plant δ13C values and implications for using the 13C technique in long-term soil organic matter studies. Soil Biology & Biochemistry. 33:1245-1251. 2001
- Alley cropping with Senna siamea in South-western Nigeria : I . Recovery of 15N labeled urea by the alley cropping system. Plant and Soil. 231:187-199. 2001
- Alley cropping with Senna siamea in South-western Nigeria: II. Dry matter, total N, and urea-derived N dynamics of the Senna and maize roots. Plant and Soil. 231:201-210. 2001
- Assessment of soil factors limiting growth and establishment of Mucuna in farmers' fields in the derived savanna of the Benin Republic. Biology and Fertility of Soils. 33:416-422. 2001
- Leaf quality of selected hedgerow species at two canopy ages in the derived savanna zone of West Africa. Agroforestry Systems. 53:21-30. 2001
- Nitrogen management in 'adequate' input maize-based agriculture in the derived savanna benchmark zone of Benin Republic. Plant and Soil. 228:61-71. 2001
- Soil Organic Matter and Soil Fertility 2001
- Utilization of rock phosphate by crops on a representative toposequence in the Northern Guinea savanna zone of Nigeria: response by Mucuna pruriens, Lablab purpureus and maize. Soil Biology & Biochemistry. 32:2063-2077. 2000
- Utilization of rock phosphate by crops on a representative toposequence in the Northern Guinea savanna zone of Nigeria: response by maize to previous herbaceous legume cropping and rock phosphate treatments. Soil Biology & Biochemistry. 32:2079-2090. 2000
- Charge characteristics of soil organic matter fractions in a Ferric Lixisol under some multipurpose trees. Agroforestry Systems. 48:169-188. 2000
- Evaluation of symbiotic dinitrogen inputs of herbaceous legumes into tropical cover-crop systems. Biology and Fertility of Soils. 32:234-242. 2000
- Influence of phytoparasitic nematodes on symbiotic N2 fixation in tropical herbaceous legume cover crops. Biology and Fertility of Soils. 31:254-260. 2000
- Nitrogen and phosphorus uptake by maize as affected by particulate organic matter quality, soil characteristics, and land-use history for soils from West African moist savanna zone. Biology and Fertility of Soils. 30:440-449. 2000
- Nitrogen and phosphorus uptake by maize as affected by particulate organic matter quality, soil characteristics, and land-use history for soils from the West African moist savanna zone 2000
- Nitrogen contributions from decomposing cover crop residues to maize in a tropical derived savanna.. Nutrient Cycling in Agroecosystems. 57:131-140. 2000
- Organic residues affect phosphorus availability and maize yields in a Nitisol of western Kenya 2000
- Transformations and recovery of residue and fertilizer nitrogen-15 in a sandy Lixisol of West Africa. Biology and Fertility of Soils. 31:261-269. 2000
- Utilization of rock phosphate by crops on a representative toposequence in the northern Guinea savanna zone of Nigeria: response by maize to previous herbaceous legume cropping and rock phospate treatments 2000
- Evaluation of methods for measuring microbial biomass C and N and relationships between microbial biomass and soil organic matter particle size classes in West-African soils. Soil Biology & Biochemistry. 31:1071-1082. 1999
- Alley cropping in the moist savanna of West Africa II. Impact on soil productivity in a north-to-south transect in Togo 1999
- Alley cropping in the moist savanna of West Africa III. Soil organic matter fractionation and soil productivity 1999
- Evaluation of methods for measuring microbial biomass C and N and their relationship with soil organic matter particle size classes for soils from the West-African moist savanna zone 1999
- Alley cropping in the moist savanna of West-Africa : II. Impact on soil productivity in a North-to-South transect in Togo. Agroforestry Systems. 42:229-244. 1998
- Alley cropping in the moist savanna of West-Africa. III. Soil organic matter fractionation and soil productivity. Agroforestry Systems. 42:245-264. 1998
- Mineral N dynamics in bare and cropped Leucaena leucocephala and Dactyladenia barteri alley cropping systems after the addition of 15N‐labelled leaf residues. European Journal of Soil Science. 49:417-425. 1998
- Alley cropping in the moist savanna of West-Africa: I. Restoration and maintenance of soil fertility on ’terre de barre‘ soils in Bénin Republic. Agroforestry Systems. 42:213-227. 1998
- Mineral N dynamics in bare and cropped Leucaena leucocephala and Dactyladenia barteri alley cropping systems after the addition of 15N-labelled leaf residues 1998
- Recovery of Leucaena and Dactyladenia Residue Nitrogen-15 in Alley Cropping Systems. Soil Science Society of America Journal. 62:454-460. 1998
- Soil organic matter dynamics after addition of nitrogen-15-labeled Leucaena and Dactyladenia residues. Soil Science Society of America Journal. 62:461-466. 1998
- Decomposition of four Leucaena and Senna prunings in alley cropping systems under sub-humid tropical conditions: The process and its modifiers. Soil Biology & Biochemistry. 29:131-137. 1997
- Residue quality and decomposition: An unsteady relationship? 1997
- Impact of residue quality on the C and N mineralization of leaf and root residues of three agroforestry species. Plant and Soil. 183:221-231. 1996
- Decomposition and nitrogen mineralization of prunings of different quality 1993
- Evolution of plant biomass and nutrient content in relation to soil fertility changes in two alley cropping systems 1993
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document
- Integrated soil fertility management: operational definition and consequences for implementation and dissemination. Proceedings of the 19th World Congress of Soil Science: Soil solutions for a changing world 2010
- Bridging the gap between farmers and researchers through collaborative experimentation: cost and labour reduction in soybean production in South-Nyanza, Kenya 2008
- Plant-available P for maize and cowpea in P-deficient soils from the Nigerian northern Guinea Savanna: comparison of E- and L-values 2006
- The mineralization of sulfur from organic residues measured by inverse isotope dilution 2006
- Sulphur immobilization and availability in soils assessed using isotope dillution 2005
- Balanced nutrient management system technologies in the northern Guinea savanna of Nigeria: validation, adaptation, and perspective 2004
- Balanced nutrient management systems for cropping systems in the tropics: from concept to practice 2003
- Evaluating options for soil organic carbon maintenance under intensive cropping in the West African savanna using the Rothamsted Carbon (RothC) model 2003
- Fertility status of soils of the derived savanna and northern guinea savanna benchmarks and response to major plant nutrients, as influenced by soil type and land use management 2002
- Direct interactions between N fertilizer and organic matter: evidence from trials with 15N-labeled fertilizer 2001
- On-farm evaluation of the contribution of sole and mixed applications of organic matter and urea to maize grain production in the savanna 2001
- Options for increasing P availability from low creative rock phosphate 2001
- Options for soil organic carbon maintenance under intensive cropping in the West African savanna 2001
- Temporal variations in plant delta 13C values and implications for using the 13C technique in long-term soil organic matter studies 2001
- Charge characteristics of soil organic matter fractions in a Ferric Lixisol under some multi-purpose trees 2000
- Nitrogen contributions from decomposing cover crop residues to maize in a tropical derived savanna 2000
- Utilization of rock phosphate by crops on a representative toposequence in the northern Guinea savanna zone of Nigeria: response by Mucuna pruriens, Lablab purpureus, and maize 2000
- Residue fractionation and decomposition: the significance of the active fraction 1994