الرئيسية › دليل الباحثين › Keith D. Shepherd
Keith D. Shepherd
الانتماء : World Agroforestry Centre
- 90منشورات (انتماء كيني)
الملف البحثي
لدى Keith D. Shepherd 90 منشور(ات) مفهرسة (1995–2024). تُنشر أعماله أساسًا في «Geoderma»، «Soil Science Society of America Journal» و«Nutrient Cycling in Agroecosystems». أكثر مقالاته استشهادًا هو «Development of Reflectance Spectral Libraries for Characterization of Soil Properties» (2002)، وقد استُشهد به 1032 مرة. 3 من هذه المنشورات تعود إلى آخر ثلاث سنوات من النشاط. شارك في تأليف أعماله 12 باحثًا على الأقل، منهم باحثون من مؤسسات في ألمانيا، هولندا، كولومبيا، المملكة المتحدة.
هل هذا أنت؟ عرّف بأبحاثك
أنشئ ملفك على DzCademia مجانًا وأضف مقالاتك: ستظهر بسهولة أكبر على Google وفي مساعدي الذكاء الاصطناعي مثل ChatGPT، فيقرؤها ويستشهد بها عدد أكبر من الناس.
إنشاء ملفي المجاني إضافة منشوراتيالمنشورات (90)
- 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
مجلات النشر
- Geoderma × 13
- Soil Science Society of America Journal × 8
- Nutrient Cycling in Agroecosystems × 5
- Agriculture Ecosystems & Environment × 5
- PLoS ONE × 4
- Agricultural Systems × 4
المنشورات حسب السنة
- 20241
- 20222
- 20218
- 20207
- 20195
- 20185
- 20176
- 20168
- 201510
- 20143
التعاون العلمي
المؤسسات الشريكة : International Center for Tropical Agriculture · University of Nairobi · Wageningen University & Research · Jomo Kenyatta University of Agriculture and Technology · Kenya Forestry Research Institute
بلدان المؤلفين المشاركين : ألمانيا · هولندا · كولومبيا · المملكة المتحدة
المؤلفون المشاركون
- 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
البيانات البيبليوغرافية مصدرها OpenAlex (قاعدة مفتوحة).
لماذا تختارون Dzcademia؟
ملفات أكاديمية ومقالات ومداخلات علمية: امنحوا أبحاثكم حضوراً عاماً منظماً. تساعد البيانات الوصفية المدمجة محركات البحث ومساعدات الذكاء الاصطناعي على التعرف على أعمالكم وفهم مراجعها.
علّق عبر Google
سجّل الدخول عبر Google للتعليق مباشرة على هذه الصفحة.