selected publications
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article
- Adapting yet not adopting? Conservation agriculture in Central Malawi. Agriculture, Ecosystems & Environment. 307:107224. 2021
- Farmers’ Perceptions as a Driver of Agricultural Practices: Understanding Soil Fertility Management Practices in Cocoa Agroforestry Systems in Cameroon. Human Ecology. 1-12. 2020
- Phylogeography and Symbiotic Effectiveness of Rhizobia Nodulating Chickpea (Cicer arietinum L.) in Ethiopia.. Microbial Ecology. 1-14. 2020
- Symbiotic interactions between chickpea (Cicer arietinum L.) genotypes and Mesorhizobium strains. Symbiosis. 82:1-14. 2020
- Living income benchmarking of rural households in low-income countries. Food Security. 1-21. 2020
- Diversity in perception and management of farming risks in southern Mali. Agricultural Systems. 184:102905. 2020
- Towards closing cassava yield gap in West Africa: Agronomic efficiency and storage root yield responses to NPK fertilizers. Field Crops Research. 253:107820. 2020
- Should fertilizer recommendations be adapted to parkland agroforestry systems? Case studies from Ethiopia and Rwanda. Plant and Soil. 453:1-16. 2020
- Herbicide Induced Hunger? Conservation Agriculture, Ganyu Labour and Rural Poverty in Central Malawi. Journal of Development Studies. 1-20. 2020
- Micro-livestock in smallholder farming systems: the role, challenges and opportunities for cavies in South Kivu, eastern DR Congo.. Tropical Animal Health and Production. 52:1167-1177. 2020
- Evaluating the effects of storage conditions on dry matter loss and nutritional quality of grain legume fodders in West Africa. Animal Feed Science and Technology. 262:114419. 2020
- Reproducibility and external validity of on-farm experimental research in Africa. Experimental Agriculture. 56:587-607. 2020
- The response of climbing bean to fertilizer and organic manure in the Northern Province of Rwanda. Experimental Agriculture. 56:722-737. 2020
- The role of nitrogen fixation in African smallholder agriculture. Agriculture, Ecosystems & Environment. 285:106601. 2019
- The role of legumes in the sustainable intensification of African smallholder agriculture : Lessons learnt and challenges for the future. Agriculture, Ecosystems & Environment. 284:106583. 2019
- Vulnerability and adaptation options to climate change for rural livelihoods – A country-wide analysis for Uganda. Agricultural Systems. 176:102663. 2019
- Co-design of improved climbing bean production practices for smallholder farmers in the highlands of Uganda. Agricultural Systems. 175:1-12. 2019
- LEGUME–MAIZE ROTATION OR RELAY? OPTIONS FOR ECOLOGICAL INTENSIFICATION OF SMALLHOLDER FARMS IN THE GUINEA SAVANNA OF NORTHERN GHANA. Experimental Agriculture. 55:673-691. 2019
- Genetic Interaction Studies Reveal Superior Performance of Rhizobium tropici CIAT899 on a Range of Diverse East African Common Bean (Phaseolus vulgaris L.) Genotypes.. Applied and Environmental Microbiology. 85. 2019
- Applying the aboveground-belowground interaction concept in agriculture: Spatio-temporal scales matter. Frontiers in Ecology and Evolution. 7:300. 2019
- Is labour a major determinant of yield gaps in sub-Saharan Africa? A study of cereal-based production systems in Southern Ethiopia. Agricultural Systems. 174:39-51. 2019
- N2Africa Annual Report 2018 2019
- Are farmers searching for an African green revolution? Exploring the solution space for agricultural intensification in southern Mali. Experimental Agriculture. 55:288-310. 2019
- MAKING THE MOST OF IMPERFECT DATA: A CRITICAL EVALUATION OF STANDARD INFORMATION COLLECTED IN FARM HOUSEHOLD SURVEYS. Experimental Agriculture. 55:230-250. 2019
- A recipe for success? Learning from the rapid adoption of improved chickpea varieties in Ethiopia.. International Journal of Agricultural Sustainability. 17:34-48. 2019
- Beyond averages: new approaches to understand heterogeneity and risk of technology success or failure in smallholder farming. Experimental Agriculture. 55:84-106. 2019
- DO OPEN-POLLINATED MAIZE VARIETIES PERFORM BETTER THAN HYBRIDS IN AGROFORESTRY SYSTEMS?. Experimental Agriculture. 55:649-661. 2019
- FERTILISER APPLICATION PRACTICES AND NUTRIENT DEFICIENCIES IN SMALLHOLDER OIL PALM PLANTATIONS IN INDONESIA. Experimental Agriculture. 55:543-559. 2019
- FROM BEST FIT TECHNOLOGIES TO BEST FIT SCALING: INCORPORATING AND EVALUATING FACTORS AFFECTING THE ADOPTION OF GRAIN LEGUMES IN SUB-SAHARAN AFRICA. Experimental Agriculture. 55:226-251. 2019
- Poor farmers - poor yields: socio-economic, soil fertility and crop management indicators affecting climbing bean productivity in northern Rwanda. Experimental Agriculture. 55:14-34. 2019
- Using household survey data to identify large-scale food security patterns across Uganda.. PLOS ONE. 13. 2018
- A framework for priority-setting in climate smart agriculture research. Agricultural Systems. 167:161-175. 2018
- Risk management options in maize cropping systems in semi-arid areas of Southern Africa. Field Crops Research. 228:110-121. 2018
- How do climbing beans fit in farming systems of the eastern highlands of Uganda? Understanding opportunities and constraints at farm level. Agricultural Systems. 165:97-110. 2018
- Yield gap analysis and entry points for improving productivity on large oil palm plantations and smallholder farms in Ghana. Agricultural Systems. 165:14-25. 2018
- Additive yield response of chickpea (Cicer arietinum L.) to rhizobium inoculation and phosphorus fertilizer across smallholder farms in Ethiopia. AGRICULTURE ECOSYSTEMS & ENVIRONMENT. 261:144-152. 2018
- Crop vs. tree: Can agronomic management reduce trade-offs in tree-crop interactions?. AGRICULTURE ECOSYSTEMS & ENVIRONMENT. 260:36-46. 2018
- Excessive pruning and limited regeneration: Are Faidherbia albida parklands heading for extinction in the Central Rift Valley of Ethiopia?. Land Degradation & Development. 29:1623-1633. 2018
- Conservation agriculture with trees amplifies negative effects of reduced tillage on maize performance in East Africa. Field Crops Research. 221:238-244. 2018
- Climate-smart land use requires local solutions, transdisciplinary research, policy coherence and transparency. Carbon Management. 9:291-301. 2018
- Agricultural intensification and policy interventions: Exploring plausible futures for smallholder farmers in Southern Mali. Land Use Policy. 70:623-634. 2018
- Climate-smart agroforestry: Faidherbia albida trees buffer wheat against climatic extremes in the Central Rift Valley of Ethiopia. Agricultural and Forest Meteorology. 248:339-347. 2018
- Simulating drought impact and mitigation in cassava using the LINTUL model. Field Crops Research. 219:256-272. 2018
- Soyabean response to rhizobium inoculation across sub-Saharan Africa: Patterns of variation and the role of promiscuity.. AGRICULTURE ECOSYSTEMS & ENVIRONMENT. 261:211-218. 2018
- Understanding variability in the benefits of N-2-fixation in soybean-maize rotations on smallholder farmers' fields in Malawi. AGRICULTURE ECOSYSTEMS & ENVIRONMENT. 261:241-250. 2018
- Food availability and livelihood strategies among rural households across Uganda. Food Security. 9:1385-1403. 2017
- Disentangling the positive and negative effects of trees on maize performance in smallholdings of Northern Rwanda. Field Crops Research. 213:1-11. 2017
- Maize-grain legume intercropping for enhanced resource use efficiency and crop productivity in the Guinea savanna of northern Ghana.. Field Crops Research. 213:38-50. 2017
- Sustainable intensification through rotations with grain legumes in Sub-Saharan Africa : A review. Agriculture, Ecosystems & Environment. 261:172-185. 2017
- Benefits of inoculation, P fertilizer and manure on yields of common bean and soybean also increase yield of subsequent maize.. Agriculture, Ecosystems & Environment. 261:219-229. 2017
- Co-learning cycles to support the design of innovative farm systems in southern Mali. European Journal of Agronomy. 89:61-74. 2017
- Farmers' use and adaptation of improved climbing bean production practices in the highlands of Uganda.. Agriculture, Ecosystems & Environment. 261:186-200. 2017
- N2-fixation and N contribution by grain legumes under different soil fertility status and cropping systems in the Guinea savanna of northern Ghana.. Agriculture, Ecosystems & Environment. 261:201-210. 2017
- Collective action in a smallholder oil palm production system in Indonesia: The key to sustainable and inclusive smallholder palm oil?. Journal of Rural Studies. 54:198-210. 2017
- Is maize-cowpea intercropping a viable option for smallholder farms in the risky environments of semi-arid southern Africa?. Field Crops Research. 209:73-87. 2017
- Tillage, mulch and fertiliser impacts on soil nitrogen availability and maize production in semi-arid Zimbabwe. Soil & Tillage Research. 168:125-132. 2017
- Elevating the conversation about GE crops.. Nature Biotechnology. 35:302-304. 2017
- Response to Gould et al . and Vincelli et al .. Nature Biotechnology. 35:306-308. 2017
- Is production intensification likely to make farm households food-adequate? A simple food availability analysis across smallholder farming systems from East and West Africa. Food Security. 9:115-131. 2017
- Modelling cereal crops to assess future climate risk for family food self-sufficiency in southern Mali. Field Crops Research. 201:133-145. 2017
- N2Africa Project Malawi Exit Strategy 2017
- PARTICIPATORY RESEARCH TO CLOSE THE SOYBEAN YIELD GAP ON SMALLHOLDER FARMS IN MALAWI. Experimental Agriculture. 53:396-415. 2017
- Waking the Sleeping Giant: Agricultural intensification, extensification or stagnation in Mali's Guinea Savannah. Agricultural Systems. 148:58-70. 2016
- Methods for Environment: Productivity Trade-Off Analysis in Agricultural Systems 2016
- Migration and self-protection against climate change:a case study of Samburu County, Kenya. World Development. 84:55-68. 2016
- Climate-smart crop production in semi-arid areas through increased knowledge of varieties, environment and management factors. Nutrient Cycling in Agroecosystems. 105:183-197. 2016
- Livestock wealth and social capital as insurance against climate risk : a case study of Samburu County in Kenya. Agricultural Systems. 146:44-54. 2016
- Climate change adaptation and mitigation in smallholder crop–livestock systems in sub-Saharan Africa: a call for integrated impact assessments. Regional Environmental Change. 16:2331-2343. 2016
- Adaptation of agriculture to climate change in semi-arid Borena, Ethiopia. Regional Environmental Change. 16:2317-2330. 2016
- Unravelling the causes of variability in crop yields and treatment responses for better tailoring of options for sustainable intensification in southern Mali. Field Crops Research. 187:113-126. 2016
- Understanding variability in soybean yield and response to P-fertilizer and rhizobium inoculants on farmers’ fields in northern Nigeria. Field Crops Research. 186:133-145. 2016
- Drivers of household food availability in sub-Saharan Africa based on big data from small farms. Proceedings of the National Academy of Sciences of the United States of America. 113:458-463. 2016
- Diversity in crop residue management across an intensification gradient in southern Africa : System dynamics and crop productivity. Field Crops Research. 185:79-88. 2016
- WHICH OPTIONS FIT BEST? OPERATIONALIZING THE SOCIO-ECOLOGICAL NICHE CONCEPT 2016
- Maize crop residue uses and trade-offs on smallholder crop-livestock farms in Zimbabwe: Economic implications of intensification. AGRICULTURE ECOSYSTEMS & ENVIRONMENT. 214:31-45. 2015
- Climate change and maize yield in southern Africa: what can farm management do?. Global Change Biology. 21:4588-4601. 2015
- Climate variability and change in Southern Mali: learning from farmer perceptions and on-farm trials. Experimental Agriculture. 51:615-634. 2015
- Diversity in smallholder farms growing coffee and their use of recommended coffee management practices in Uganda.. Experimental Agriculture. 51:594-614. 2015
- Understanding farm trajectories and development pathways: Two decades of change in southern Mali. Agricultural Systems. 139:210-222. 2015
- Water use by short rotation Eucalyptus woodlots in southern Rwanda. Agroforestry Systems. 89:1119-1139. 2015
- Milk: the new white gold? Milk production options for smallholder farmers in Southern Mali.. Animal. 9:1221-1229. 2015
- Feeding, crop residue and manure management for integrated soil fertility management - A case study from Kenya. Agricultural Systems. 134:24-35. 2015
- Evaluating coffee yield gaps and important biotic, abiotic, and management factors limiting coffee production in Uganda. European Journal of Agronomy. 63:1-11. 2015
- Fuelwood collection and its impacts on a protected tropical mountain forest in Uganda. Forest Ecology and Management. 354:56-67. 2015
- Integrated soil fertility management in sub-Saharan Africa: unravelling local adaptation. SOIL. 1:491-508. 2015
- Benefits of legume–maize rotations: Assessing the impact of diversity on the productivity of smallholders in Western Kenya. Field Crops Research. 168:75-85. 2014
- Simulating potential growth and yield of oil palm (Elaeis guineensis) with PALMSIM: Model description, evaluation and application. Agricultural Systems. 131:1-10. 2014
- The ‘One cow per poor family’ programme: Current and potential fodder availability within smallholder farming systems in southwest Rwanda. Agricultural Systems. 131:11-22. 2014
- Phenological development of East African highland banana involves trade-offs between physiological age and chronological age. European Journal of Agronomy. 60:41-53. 2014
- Response to Sommer et al. (2014) Fertiliser use is not required as a fourth principle to define conservation agriculture. Field Crops Research. 167:159-159. 2014
- Resource use and food self-sufficiency at farm scale within two agro-ecological zones of Rwanda. Food Security. 6:609-628. 2014
- Adaptive livelihood strategies employed by farmers to close the food gap in semi-arid south eastern Zimbabwe. Food Security. 6:313-326. 2014
- Comparative assessment of maize, finger millet and sorghum for household food security in the face of increasing climatic risk. European Journal of Agronomy. 55:29-41. 2014
- Agriculture and nature: Trouble and strife?. Biological Conservation. 170:232-245. 2014
- Evaluation of climate adaptation options for Sudano-Sahelian cropping systems. Field Crops Research. 156:63-75. 2014
- A fourth principle is required to define Conservation Agriculture in sub-Saharan Africa: The appropriate use of fertilizer to enhance crop productivity. Field Crops Research. 155:10-13. 2014
- Sources of vulnerability to a variable and changing climate among smallholder households in Zimbabwe : A participatory analysis. Climate Risk Management. 3:65-78. 2014
- Managing soil fertility to adapt to rainfall variability in smallholder cropping systems in Zimbabwe. Field Crops Research. 154:211-225. 2013
- Effects of climate variability and climate change on crop production in southern Mali. European Journal of Agronomy. 49:115-125. 2013
- Managing Tephrosia mulch and fertilizer to enhance coffee productivity on smallholder farms in the Eastern African Highlands. European Journal of Agronomy. 48:19-29. 2013
- Pushing the envelope? Maize production intensification and the role of cattle manure in recovery of degraded soils in smallholder farming areas of Zimbabwe. Field Crops Research. 147:40-53. 2013
- Complex contexts and dynamic drivers: understanding four decades of forest loss and recovery in an East African protected area. Biological Conservation. 159:257-268. 2013
- Assessing farmers’ interest in agroforestry in two contrasting agro-ecological zones of Rwanda. Agroforestry Systems. 87:141-158. 2013
- Participatory action research (PAR) as an entry point for supporting climate change adaptation by smallholder farmers in Africa. Environmental development. 5:6-22. 2013
- The Use of Woodland Products to Cope with Climate Variability in Communal Areas in Zimbabwe. Ecology and Society. 18. 2013
- Maize-grain legume intercropping is an attractive option for ecological intensification that reduces climatic risk for smallholder farmers in central Mozambique. Field Crops Research. 136:12-22. 2012
- Minimum tillage and vegetative barrier effects on crop yields in relation to soil water content in the Central Kenya highlands. Field Crops Research. 132:129-138. 2012
- Zhombwe (Neorautanenia brachypus (Harms) C.A.Sm.) – A recent discovery for mitigating effects of drought on livestock in semi-arid areas of Southern Africa. Ethnobotany Research and Applications. 10:199-212. 2012
- Comparative performance of conservation agriculture and current smallholder farming practices in semi-arid Zimbabwe. Field Crops Research. 132:117-128. 2012
- Failing to Yield? Ploughs, Conservation Agriculture and the Problem of Agricultural Intensification: An Example from the Zambezi Valley, Zimbabwe. Journal of Development Studies. 48:393-412. 2012
- Socio-ecological niches for minimum tillage and crop residue retention in continuous maize cropping systems in smallholder farms of central Kenya. Agronomy Journal. 103:188-198. 2012
- A research agenda to explore the role of conservation agriculture in African smallholder farming systems. Field Crops Research. 124:468-472. 2011
- Tillage and vegetative barrier effects on soil conservation and short-term economic benefits in the Central Kenya highlands. Field Crops Research. 122:85-94. 2011
- Delineating the drivers of waning wildlife habitat: The predominance of cotton farming on the fringe of protected areas in the Mid-Zambezi Valley, Zimbabwe. Biological Conservation. 144:1481-1493. 2011
- Managing soil fertility diversity to enhance resource use efficiencies in smallholder farming systems: a case from Murewa District, Zimbabwe. Nutrient Cycling in Agroecosystems. 90:87-103. 2011
- Communicating complexity: Integrated assessment of trade-offs concerning soil fertility management within African farming systems to support innovation and development. Agricultural Systems. 104:191-203. 2011
- Competing use of organic resources, village-level interactions between farm types and climate variability in a communal area of NE Zimbabwe. Agricultural Systems. 104:175-190. 2011
- Adaptability of irrigated rice to temperature change in sahelian environments. Experimental Agriculture. 47:69-87. 2011
- Effect of Farmer resource endowment and management strategies on spatial variability of soil fertility in contrasting agro-ecological zones in Zimbabwe 2011
- Effects of Conservation Agriculture and manure application on maize grain yield and soil organic carbon: a comparative analysis 2011
- Nitrogen and phosphorus capture and recovery efficiencies, and crop responses to a range of soil fertility management strategies in sub-Saharan Africa 2011
- Strengthening understanding and perceptions of mineral fertilizer use among smallholder farmers: evidence from collective trials in western Kenya. Agriculture and Human Values. 28:27-38. 2011
- Targeting resources within diverse, heterogeneous and dynamic farming systems: Towards a ‘uniquely African green revolution’ 2011
- Effect of farmer management strategies on spatial variability of soil fertility and crop nutrient uptake in contrasting agro-ecological zones in Zimbabwe. Nutrient Cycling in Agroecosystems. 88:111-120. 2010
- Nitrogen and phosphorus capture and recovery efficiencies, and crop responses to a range of soil fertility management strategies in sub-Saharan Africa. Nutrient Cycling in Agroecosystems. 88:59-77. 2010
- Impacts of heterogeneity in soil fertility on legume-finger millet productivity, farmers’ targeting and economic benefits. Nutrient Cycling in Agroecosystems. 87:209-231. 2010
- Mineral fertilizer response and nutrient use efficiencies of East African highland banana (Musa spp., AAA-EAHB, cv. Kisansa). Field Crops Research. 117:38-50. 2010
- False beliefs on the socio-economic drivers of cassava cropping. Agronomy for Sustainable Development. 30:433-444. 2010
- Drivers of land use change and household determinants of sustainability in smallholder farming systems of Eastern Uganda. Population and Environment. 31:474-506. 2010
- Rice production with less irrigation water is possible in a Sahelian environment.. Field Crops Research. 116:154-164. 2010
- Carbon and nutrient losses during manure storage under traditional and improved practices in smallholder crop-livestock systems - evidence from Kenya.. Plant and Soil. 328:253-269. 2010
- Cotton expansion and biodiversity loss in African savannahs, opportunities and challenges for conservation agriculture: A review paper based on two case studies 2010
- FIELD-A summary simulation model of the soil–crop system to analyse long-term resource interactions and use efficiencies at farm scale. European Journal of Agronomy. 32:10-21. 2010
- Farmer evaluation of phosphorus fertilizer application to annual legumes in Chisepo, Central Malawi. African Journal of Agricultural Research. 5:668-680. 2010
- Integrated soil fertility management Operational definition and consequences for implementation and dissemination. Outlook on Agriculture. 39:17-24. 2010
- Risk analysis of maize-legume crop combinations with smallholder farmers varying in resource endowment in Central Malawi. Experimental Agriculture. 46:1-21. 2010
- Towards understanding factors that govern fertilizer response in cassava: lessons from East Africa. Nutrient Cycling in Agroecosystems. 86:133-151. 2010
- Allometric growth relationships of East Africa highland bananas (Musa AAA‐EAHB) cv. Kisansa and Mbwazirume. Annals of Applied Biology. 155:403-418. 2009
- Identifying key entry-points for strategic management of smallholder farming systems in sub-Saharan Africa using the dynamic farm-scale simulation model NUANCES-FARMSIM. Agricultural Systems. 102:89-101. 2009
- Lifetime productivity of dairy cows in smallholder farming systems of the Central highlands of Kenya.. Animal. 3:1044-1056. 2009
- Cotton expansion and biodiversity loss in African savannahs, opportunities and challenges for conservation agriculture: a review paper based on two case studies. Biodiversity and Conservation. 18:2625-2644. 2009
- An integrated evaluation of strategies for enhancing productivity and profitability of resource-constrained smallholder farms in Zimbabwe. Agricultural Systems. 101:57-68. 2009
- Beyond resource constraints - Exploring the biophysical feasibility of options for the intensification of smallholder crop-livestock systems in Vihiga district, Kenya. Agricultural Systems. 101:1-19. 2009
- Closing the cassava yield gap: An analysis from smallholder farms in East Africa. Field Crops Research. 112:24-36. 2009
- Resource flows, crops and soil fertility management in smallholder farming systems in semi-arid Zimbabwe. Soil Use and Management. 25:78-90. 2009
- Productivity and residual benefits of grain legumes to sorghum under semi-arid conditions in south-western Zimbabwe: Unravelling the effects of water and nitrogen using a simulation model. Field Crops Research. 110:173-184. 2009
- Increasing land pressure in East Africa: The changing role of cassava and consequences for sustainability of farming systems. Agriculture, Ecosystems & Environment. 128:239-250. 2008
- Low-Cost Economic and Environmental Performance Assessment of Farm Households Systems: Application to Mixed Crop-Livestock Systems in the Ethiopian Highlands. Journal of Sustainable Agriculture. 32:565-595. 2008
- Combining organic and mineral fertilizers for integrated soil fertility management in smallholder farming systems of Kenya : Explorations using the crop-soil model FIELD. Agronomy Journal. 100:1511-1526. 2008
- Yield gaps, nutrient use efficiencies and response to fertilisers by maize across heterogeneous smallholder farms of western Kenya. Plant and Soil. 313:19-37. 2008
- Aggregating field-scale knowledge into farm-scale models of African smallholder systems: Summary functions to simulate crop production using APSIM. Agricultural Systems. 97:151-166. 2008
- Multiple benefits of manure: The key to maintenance of soil fertility and restoration of depleted sandy soils on African smallholder farms. Nutrient Cycling in Agroecosystems. 80:267-282. 2008
- Unravelling the effects of soil and crop management on maize productivity in smallholder agricultural systems of western Kenya—An application of classification and regression tree analysis. AGRICULTURE ECOSYSTEMS & ENVIRONMENT. 123:137-150. 2008
- Variable grain legume yields, responses to phosphorus and rotational effects on maize across soil fertility gradients on African smallholder farms. Nutrient Cycling in Agroecosystems. 80:1-18. 2008
- Manure as a key resource within smallholder farming systems: Analysing farm-scale nutrient cycling efficiencies with the NUANCES framework. Livestock Science. 112:273-287. 2007
- Productivity and residual benefits of grain legumes to sorghum under semi-arid conditions in southwestern Zimbabwe. Plant and Soil. 299:1-15. 2007
- Long-term impact of reduced tillage and residue management on soil carbon stabilization: Implications for conservation agriculture on contrasting soils. Soil & Tillage Research. 94:328-337. 2007
- Soil type, management history and current resource allocation: Three dimensions regulating variability in crop productivity on African smallholder farms. Field Crops Research. 101:296-305. 2007
- Partial balance of nitrogen in a maize cropping system in humic nitisol of Central Kenya. Nutrient Cycling in Agroecosystems. 76:261-270. 2007
- Niche-based assessment of contributions of legumes to the nitrogen economy of Western Kenya smallholder farms. Plant and Soil. 292:119-135. 2007
- Influence of nutrient management strategies on variability of soil fertility, crop yields and nutrient balances on smallholder farms in Zimbabwe. AGRICULTURE ECOSYSTEMS & ENVIRONMENT. 119:112-126. 2007
- Raising the productivity of smallholder farms under semi-arid conditions by use of small doses of manure and nitrogen: a case of participatory research. Nutrient Cycling in Agroecosystems. 77:53-67. 2007
- Heterogeneity of crop productivity and resource use efficiency within smallholder Kenyan farms: Soil fertility gradients or management intensity gradients?. Agricultural Systems. 94:376-390. 2007
- Popular myths around soil fertility management in sub-Saharan Africa. AGRICULTURE ECOSYSTEMS & ENVIRONMENT. 116:34-46. 2006
- Atmospheric Nitrogen Deposition in World Biodiversity Hotspots: the Need for a Greater Global Perspective in Assessing N Deposition Impacts. Global Change Biology. 12:470-476. 2006
- Exploring diversity of crop and soil management within smallholder African farms: A dynamic model for simulation of N balances and use efficiencies at field scale. Agricultural Systems. 91:71-101. 2006
- Socio-ecological niche: a conceptual framework for integration of legumes in smallholder farming systems. International Journal of Agricultural Sustainability. 4:79-93. 2006
- Exploring diversity in soil fertility management of smallholder farms in western Kenya: II. Within-farm variability in resource allocation, nutrient flows and soil fertility status. AGRICULTURE ECOSYSTEMS & ENVIRONMENT. 110:166-184. 2005
- Estimating yields of tropical maize genotypes from non-destructive, on-farm plant morphological measurements. AGRICULTURE ECOSYSTEMS & ENVIRONMENT. 105:213-220. 2005
- Exploring diversity in soil fertility management of smallholder farms in western Kenya - I. Heterogeneity at region and farm scale. AGRICULTURE ECOSYSTEMS & ENVIRONMENT. 110:149-165. 2005
- Harvesting management options for legumes intercropped in napier grass in the central highlands of Kenya. Tropical Grasslands. 38:234-244. 2004
- Subsoil Nitrogen Capture in Mixed Legume Stands as Assessed by Deep Nitrogen‐15 Placement. Soil Science Society of America Journal. 67:573-582. 2003
- Nitrogen mineralization and maize yields following application of tree prunings to a sandy soil in Zimbabwe. Agroforestry Systems. 57:199-211. 2003
- Subsoil nitrogen capture in mixed legume stands as assessed by deep nitrogen-15 placement. Soil Science Society of America Journal. 67:573-582. 2003
- Implications of livestock feeding management on soil fertility in the smallholder farming systems of sub-Saharan Africa. AGRICULTURE ECOSYSTEMS & ENVIRONMENT. 84:227-243. 2001
- Organic inputs for soil fertility management in tropical agroecosystems: Application of an organic resource database. AGRICULTURE ECOSYSTEMS & ENVIRONMENT. 83:27-42. 2001
- Root distributions partially explain N-15 uptake patterns in Gliricidia and Peltophorum hedgerow intercropping systems. Plant and Soil. 235:167-179. 2001
- Putting Legume N 2 -Fixation to Work in Cropping Systems of Southern Africa 2000
- Dinitrogen fixation by pigeonpea of different maturity types on granitic sandy soils in Zimbabwe. Symbiosis. 27:305-318. 1999
- Soil Characteristics that Regulate Soil Reduction and Methane Production in Wetland Rice Soils. Soil Science Society of America Journal. 61:1526-1531. 1997
- Agricultural intensification, soil biodiversity and ecosystem function in the tropics: the role of nitrogen-fixing bacteria. Applied Soil Ecology. 6:55-76. 1997
- Agricultural intensification, soil biodiversity and agroecosystem function 1997
- Decomposition and nitrogen release patterns of tree prunings and litter. Agroforestry Systems. 38:77-97. 1997
- Seed analysis as a means of identifying micronutrient deficiencies of Phaseolus vulgaris L in the tropics. Tropical Agriculture. 72:277-284. 1995
- Diagnosis and correction of soil nutrient problems of common bean ( Phaseolus vulgaris ) in the Usambara Mountains of Tanzania. JOURNAL OF AGRICULTURAL SCIENCE. 120:233-240. 1993
- A field evaluation using the 15 N isotope dilution method of lines of Phaseolus vulgaris L. bred for increased nitrogen fixation. Plant and Soil. 152:107-114. 1993
- Nitrogen fixation in breeding lines of Phaseolus vulgaris L.. Plant and Soil. 152:103-106. 1993
- Genetic and Physiological Characterization of the Non-nodulating Mutant of Phaseolus vulgaris L. -NOD125. Journal of Experimental Botany. 43:843-849. 1992
- Evaluation of 15N-isotope dilution for measurement of nitrogen fixation in chickpea (Cicer arietinum L.). Biology and Fertility of Soils. 6:347-351. 1988
- Short-term measurements of uptake of nitrogen fixed in the rhizospheres of sorghum (Sorghum bicolor) and millet (Pennisetum americanum) 1988
- A comparison of nitrogen fixation in genotypes of groundnut (Arachis hypogaea L.) using 15N-isotope dilution. Biology and Fertility of Soils. 5:23-25. 1987
- Measurement of N2-fixation in field-grown pigeonpea [Cajanus cajan (L.) Millsp.] using15N-labelled fertilizer. Plant and Soil. 101:107-113. 1987
- Use of isotope dilution to measure nitrogen fixation associated with the roots of sorghum and millet genotypes. Plant and Soil. 90:255-263. 1986
- A method for measuring the transfer of fixed nitrogen from free-living bacteria to higher plants using 15N2. Journal of Microbiological Methods. 2:307-316. 1984
- Nitrogen Fixation Associated with the Roots of Sorghum and Millet 1984
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document
- The sociology of on-farm experiments : design, management and converging interests in agricultural research-for-development in Africa 2016
- ADAPTABILITY OF IRRIGATED RICE TO TEMPERATURE CHANGE IN SAHELIAN ENVIRONMENTS 2011
- Integrated assessment of nutrient management options in smallholder farming systems: the NUANCES framework 2009
- Evolution of indigenous land tenure institutions and tree resource management in Sumatra 1999
- Nitrogen Fixation Associated with Sorghum and Pearl Millet.AIAS occasional publication No. 12 1984
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editorial article
- Response to Sommer et al. (2014) "Fertilizer use is not required as a fourth principle to define Conservation Agriculture. Field Crops Research. 169:149-149. 2014
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hide from search
- DOING DEVELOPMENT-ORIENTED AGRONOMY: RETHINKING METHODS, CONCEPTS AND DIRECTION. Experimental Agriculture. 157-162. 2019
- Comment on "Evaluating conservation agriculture for small-scale farmers in Sub-Saharan Africa and South Asia" [Agric. Ecosyst. Environ. 187 (2014) 1-10]. AGRICULTURE ECOSYSTEMS & ENVIRONMENT. 21-23. 2014
- Nitrogen cycling efficiencies through resource-poor African crop-livestock systems. AGRICULTURE ECOSYSTEMS & ENVIRONMENT. 261-282. 2006
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review
- Genome Editing, Gene Drives, and Synthetic Biology: Will They Contribute to Disease-Resistant Crops, and Who Will Benefit?. Annual Review of Phytopathology. 165-188. 2019
- Yield gaps in oil palm: A quantitative review of contributing factors. European Journal of Agronomy. 57-77. 2017
- Beyond conservation agriculture. Frontiers in Plant Science. 870-870. 2015
- Analysis of trade-offs in agricultural systems: Current status and way forward. Current Opinion in Environmental Sustainability. 110-115. 2014
- A meta-analysis of long-term effects of conservation agriculture on maize grain yield under rain-fed conditions. Agronomy for Sustainable Development. 657-673. 2011
- Conservation agriculture and smallholder farming in Africa: The heretics' view. Field Crops Research. 23-34. 2009