Giller, K.E. Person

selected publications

• 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

• 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

• 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

• 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

• 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