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Keith D. Shepherd
Affiliation : World Agroforestry Centre
- 90Publications (affiliation kényane)
Profil de recherche
Keith D. Shepherd compte 90 publications référencées (1995–2024). Ses travaux paraissent principalement dans « Geoderma », « Soil Science Society of America Journal » et « Nutrient Cycling in Agroecosystems ». Son article le plus cité, « Development of Reflectance Spectral Libraries for Characterization of Soil Properties » (2002), a été cité 1032 fois. 3 de ces publications datent des trois dernières années d’activité. Ses travaux sont cosignés avec au moins 12 chercheurs, notamment dans des établissements de Allemagne, Pays-Bas, Colombie, Royaume-Uni.
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- Evaluating consistency across multiple NeoSpectra (compact Fourier transform near‐infrared) spectrometers for estimating common soil properties
- Portable X-ray fluorescence (pXRF) calibration for analysis of nutrient concentrations and trace element contaminants in fertilisers
- Mid-Infrared Reflectance Spectroscopy for Estimation of Soil Properties of Alfisols from Eastern India
- African soil properties and nutrients mapped at 30 m spatial resolution using two-scale ensemble machine learning
- Continental-scale controls on soil organic carbon across sub-Saharan Africa
- The central African soil spectral library: a new soil infrared repository and a geographical prediction analysis
- iSDAsoil: The first continent-scale soil property map at 30 m resolution provides a soil information revolution for Africa
- Application of infrared spectroscopy for estimation of concentrations of macro- and micronutrients in rice in sub-Saharan Africa
- Estimation of soil properties with mid-infrared soil spectroscopy across yam production landscapes in West Africa
- Stochastic simulation of restoration outcomes for a dry afromontane forest landscape in northern Ethiopia
- No changes in soil organic carbon and nitrogen following long-term prescribed burning and livestock exclusion in the Sudan-savanna woodlands of Burkina Faso
- What is a good level of soil organic matter? An index based on organic carbon to clay ratio
- Mineral–nutrient relationships in African soils assessed using cluster analysis of X-ray powder diffraction patterns and compositional methods
- A Knowledge Brokering Framework for Integrated Landscape Management
- Soil and farm management effects on yield and nutrient concentrations of food crops in East Africa
- Soil spatial variation to guide the development of fertilizer use recommendations for smallholder farms in western Kenya
- Evidence-based investment selection: Prioritizing agricultural development investments under climatic and socio-political risk using Bayesian networks
- Comprehensive nutrient analysis in agricultural organic amendments through non-destructive assays using machine learning
- A Planetary Health Perspective on Agroforestry in Sub-Saharan Africa
- Near-infrared, mid-infrared or combined diffuse reflectance spectroscopy for assessing soil fertility in rice fields in sub-Saharan Africa
- Improving development efficiency through decision analysis: Reservoir protection in Burkina Faso
- FTIR-DRIFTS-based prediction of β-carotene, α-tocopherol and l-ascorbic acid in mango (Mangifera indica L.) fruit pulp
- Readily available concentrations of selected micronutrients and harmful metals in soils of Sub-Saharan Africa
- Fertilizer response and nitrogen use efficiency in African smallholder maize farms
- Probabilistic Decision Tools for Determining Impacts of Agricultural Development Policy on Household Nutrition
- An assessment of the variation of soil properties with landscape attributes in the highlands of Cameroon
- Pre-treatment of soil X-ray powder diffraction data for cluster analysis
- Probabilistic Assessment of Investment Options in Honey Value Chains in Lamu County, Kenya
- Soil nutrient maps of Sub-Saharan Africa: assessment of soil nutrient content at 250 m spatial resolution using machine learning
- Long-term livestock exclosure did not affect soil carbon in southern Ethiopian rangelands
- When less is more: innovations for tracking progress toward global targets
- Landscape approach to assess key soil functional properties in the highlands of Cameroon: Repercussions of spatial relationships for land management interventions
- Application of DRIFT-FTIR spectroscopy for quantitative prediction of simple sugars in two local and two Floridian mango (Mangifera indica L.) cultivars in Kenya
- Evaluating regression-kriging for mid-infrared spectroscopy prediction of soil properties in western Kenya
- A global spectral library to characterize the world's soil
- A Bayesian network framework for project cost, benefit and risk analysis with an agricultural development case study
- Evaluating the utility of mid-infrared spectral subspaces for predicting soil properties
- Assessment of soil health indicators for sustainable production of maize in smallholder farming systems in the highlands of Cameroon
- The land‐potential knowledge system (landpks): mobile apps and collaboration for optimizing climate change investments
- Estimation of wet aggregation indices using soil properties and diffuse reflectance near infrared spectroscopy: An application of classification and regression tree analysis
- Grazing lands in Sub-Saharan Africa and their potential role in climate change mitigation: What we do and don't know
- Environmental implications of high metal content in soils of a titanium mining zone in Kenya
- Mapping Soil Properties of Africa at 250 m Resolution: Random Forests Significantly Improve Current Predictions
- Is conservation agriculture ‘climate-smart’ for maize farmers in the highlands of Tanzania?
- Plant elemental composition and portable X‐ray fluorescence (pXRF) spectroscopy: quantification under different analytical parameters
- Mid-Infrared and Total X-Ray Fluorescence Spectroscopy Complementarity for Assessment of Soil Properties
- Total elemental composition of soils in Sub-Saharan Africa and relationship with soil forming factors
- Policy: Development goals should enable decision-making
- Fresh groundwater for Wajir—ex-ante assessment of uncertain benefits for multiple stakeholders in a water supply project in Northern Kenya
- Soil chemical properties dynamics as affected by land use change in the humid forest zone of Cameroon
- Application of mid-infrared spectroscopy for rapid characterization of key soil properties for engineering land use
- Terrestrial pyrogenic carbon export to fluvial ecosystems: Lessons learned from the White Nile watershed of East Africa
- Land health surveillance and response: A framework for evidence-informed land management
- Rapid estimation of soil engineering properties using diffuse reflectance near infrared spectroscopy
- First Total Reflection X-Ray Fluorescence round-robin test of water samples: Preliminary results
- Quantification of total element concentrations in soils using total X-ray fluorescence spectroscopy (TXRF)
- Soil Heterogeneity and Soil Fertility Gradients in Smallholder Farms of the East African Highlands
- Targeting conservation agriculture in the context of livelihoods and landscapes
- Applicability of near‐infrared reflectance spectroscopy ( NIRS ) for determination of crude protein content in cowpea ( V igna unguiculata) leaves
- Land Health Surveillance: Mapping Soil Carbon in Kenyan Rangelands
- Do ecosystem services influence household wealth in rural Mali?
- Organic matter stabilization in soil aggregates: Understanding the biogeochemical mechanisms that determine the fate of carbon inputs in soils
- Hyperspectral remote sensing of evaporate minerals and associated sediments in Lake Magadi area, Kenya
- Generic Prediction of Soil Organic Carbon in Alfisols Using Diffuse Reflectance Fourier-Transform Mid-Infrared Spectroscopy
- Prediction of Soil Fertility Properties from a Globally Distributed Soil Mid‐Infrared Spectral Library
- Digital Soil Map of the World
- The diversity of rural livelihoods and their influence on soil fertility in agricultural systems of East Africa – A typology of smallholder farms
- Rapid erosion modeling in a Western Kenya watershed using visible near infrared reflectance, classification tree analysis and 137Cesium
- The prediction of soil carbon fractions using mid-infrared-partial least square analysis
- 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
- Infrared Spectroscopy—Enabling an Evidence-Based Diagnostic Surveillance Approach to Agricultural and Environmental Management in Developing Countries
- Factors affecting the use of fertilizers and manure by smallholders: the case of Vihiga, western Kenya
- Soil condition classification using infrared spectroscopy: A proposition for assessment of soil condition along a tropical forest-cropland chronosequence
- Bio-economic evaluation of farmers’ perceptions of viable farms in western Kenya
- Prediction of carbon mineralization rates from different soil physical fractions using diffuse reflectance spectroscopy
- Stable isotopes for characterisation of trends in soil carbon following deforestation and land use change in the highlands of Madagascar
- Global soil characterization with VNIR diffuse reflectance spectroscopy
- Exploring diversity in soil fertility management of smallholder farms in western Kenya
- Estimating the environmental costs of soil erosion at multiple scales in Kenya using emergy synthesis
- Sensing landscape level change in soil fertility following deforestation and conversion in the highlands of Madagascar using Vis-NIR spectroscopy
- Laboratory Validation of a Resource Quality‐Based Conceptual Framework for Organic Matter Management
- Decomposition and Mineralization of Organic Residues Predicted Using Near Infrared Spectroscopy
- Empirical reformulation of the universal soil loss equation for erosion risk assessment in a tropical watershed
- Rapid Characterization of Organic Resource Quality for Soil and Livestock Management in Tropical Agroecosystems Using Near‐Infrared Spectroscopy
- Development of Reflectance Spectral Libraries for Characterization of Soil Properties
- Soil fertility management in west Kenya: dynamic simulation of productivity, profitability and sustainability at different resource endowment levels
- Vertical Distribution of Roots and Soil Nitrate: Tree Species and Phosphorus Effects
- The economics of short rotation improved fallows: evidence from areas of high population density in Western Kenya
- Infection potential of farm soils as mycorrhizal inocula for Leucaena leucocephala
- Potential impact of agroforestry on soil nutrient balances at the farm scale in the East African Highlands
Revues de publication
- Geoderma × 13
- Soil Science Society of America Journal × 8
- Nutrient Cycling in Agroecosystems × 5
- Agriculture Ecosystems & Environment × 5
- PLoS ONE × 4
- Agricultural Systems × 4
Publications par année
- 20241
- 20222
- 20218
- 20207
- 20195
- 20185
- 20176
- 20168
- 201510
- 20143
Collaborations
Établissements partenaires : International Center for Tropical Agriculture · University of Nairobi · Wageningen University & Research · Jomo Kenyatta University of Agriculture and Technology · Kenya Forestry Research Institute
Pays des co-auteurs : Allemagne · Pays-Bas · Colombie · Royaume-Uni
Co-auteurs
- Andrew Sila
- Erick K. Towett
- Ermias Aynekulu
- Bernard Vanlauwe
- Eike Luedeling
- Todd S. Rosenstock
- Markus Walsh
- Tor‐Gunnar Vågen
- Jan de Leeuw
- J. K. Ndufa
- Pablo Adrián Tittonell
- Bertin Takoutsing
Données bibliographiques issues d’OpenAlex (base ouverte).
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