Agricultural production and soil nutrient mining in Africa: implications for resource conservation and policy development.

[1]  C. A. Jones,et al.  Epic - a Model for Assessing the Effects of Erosion on Soil Productivity1 , 1983 .

[2]  L. J. Hagen,et al.  A wind erosion prediction system to meet user needs , 1991 .

[3]  J. Powell,et al.  Manure utilisation, drought cycles and herd dynamics in the Sahel: implications for cropland productivity , 1995 .

[4]  S. Wood,et al.  Pilot analysis of global ecosystems: Agroecosystems , 2000 .

[5]  B. Okigbo.  Development of sustainable agricultural production systems in Africa : roles of international agricultural research centers and national agricultual research systems , 1991 .

[6]  C. Pieri.  Nutrient balances in rainfed farming systems in arid and semi-arid regions , 1983 .

[7]  J. Stoorvogel,et al.  Scaling soil nutrient balances. Enabling mesolevel applications for African realities , 2004 .

[8]  P. Hiernaux,et al.  Faecal excretion by ruminants and manure availability for crop production in semi-arid West Africa , 1995 .

[9]  G. R. Foster,et al.  RUSLE: Revised universal soil loss equation , 1991 .

[10]  L. R. Oldeman,et al.  World map of the status of human-induced soil degradation: an explanatory note. , 1990 .

[11]  N. P. Woodruff,et al.  The Physics of Wind Erosion and its Control1 , 1963 .

[12]  J. Wolf,et al.  Modeling long-term crop response to fertilizer and soil nitrogen , 1989, Plant and Soil.

[13]  P. Sánchez,et al.  Soil Fertility and Hunger in Africa , 2002, Science.

[14]  E. W. Russell,et al.  Soil Conditions and Plant Growth. , 1917 .

[15]  P. Sánchez,et al.  Properties and Management of Soils in the Tropics , 1977 .

[16]  K. Giller,et al.  Nitrogen Fixation in Tropical Cropping Systems , 1993 .

[17]  O. Badiane,et al.  A 2020 vision for food, agriculture, and the environment in Sub-Saharan Africa , 1995 .

[18]  S. C. Nana-Sinkam,et al.  Land and environmental degradation and desertification in Africa. Issues and options for sustainable economic development with transformation , 1995 .

[19]  H. Elwell.  Modelling soil losses in Southern Africa , 1978 .

[20]  Eco-regional approaches, why, what and how. , 1995 .

[21]  F. Ganry,et al.  Nitrogen balance in some tropical agrosystems. , 1985 .

[22]  I. Baillie,et al.  Booker tropical soil manual. , 1986 .

[23]  J. Stoorvogel,et al.  The nutrient input by Harmattan dust to a forest ecosystem in Côte d'Ivoire, Africa , 1997 .

[24]  B. Bobe.  Evaluation of soil erosion in the Harerge region of Ethiopia using soil loss models, rainfall simulation and field trials , 2005 .

[25]  C. Pieri.  Bilans mineraux des systèmes de cultures pluviales en zones arides et semi-arides , 1985 .

[26]  L. S. Pereira,et al.  Crop evapotranspiration : guidelines for computing crop water requirements , 1998 .

[27]  Charles W. Finkl,et al.  The Encyclopedia of soil science , 1979 .

[28]  E.M.A. Smaling,et al.  An agro-ecological framework for integrated nutrient management, with special reference to Kenya , 1993 .

[29]  J. Stoorvogel,et al.  The nutrient budgets of a watershed and its forest ecosystem in the Taï National Park in Cô d'Ivoire , 1997 .

[30]  Tom Addiscott,et al.  Concepts of solute leaching in soils: a review of modelling approaches , 1985 .

[31]  J. Bishop.  The on-site costs of soil erosion in Mali , 1989 .

[32]  R. Morgan.  Soil Erosion and Conservation , 1988 .

[33]  W. Hargrove.  Soil, environmental, and management factors influencing ammonia volatilization under field conditions. , 1988 .

[34]  J. Lingard,et al.  The use of nutrient audits to determine nutrient balances in Africa. , 2004 .

[35]  L. O. Fresco,et al.  A decision-support model for monitoring nutrient balances under agricultural land use (NUTMON) , 1993 .

[36]  Rattan Lal,et al.  The Role of Residues Management in Sustainable Agricultural Systems , 1995 .

[37]  Overestimating land degradation, underestimating farmers in the Sahel , 2001 .

[38]  Dr. Henk Breman,et al.  Woody Plants in Agro-Ecosystems of Semi-Arid Regions , 2011, Advanced Series in Agricultural Sciences.

[39]  Rattan Lal,et al.  Soil Erosion Research Methods , 1994 .

[40]  Jaroslav Hofierka,et al.  Modelling Topographic Potential for Erosion and Deposition Using GIS , 1996, Int. J. Geogr. Inf. Sci..

[41]  D. Walling.  The sediment yields of African rivers , 1984 .

[42]  J. Lingard,et al.  A conceptual model for conducting nutrient audits at national, regional, and global scales , 2004, Nutrient Cycling in Agroecosystems.

[43]  H. Dregne.  Erosion and soil productivity in Africa , 1990 .

[44]  F. Dijkhuis,et al.  Changes in the fertility status of South African soils. , 1990 .

[45]  C. Charreau.  Problèmes posés par l'utilisation agricole des sols tropicaux par des cultures annuelles , 1972 .

[46]  B. H. Janssen,et al.  A system for quantitative evaluation of the fertility of tropical soils (QUEFTS). , 1990 .

[47]  R. Lal.  Soil Erosion by Wind and Water: Problems and Prospects , 1988 .

[48]  O. Niangado,et al.  Maintien de la production agricole sahelienne (rapport mi-chemin du projet PSS) , 1994 .

[49]  N. Batjes.  Soil parameter estimates for the soil types of the world for use in global and regional modelling (Version 2.1) , 2002 .

[50]  C. Igwe,et al.  Application of SLEMSA and USLE erosion models for potential erosion hazard mapping in South-Eastern Nigeria , 1999 .

[51]  C. Baanante,et al.  Nutrient depletion in the agricultural soils of Africa , 1999 .

[52]  W. E. Larson,et al.  Conservation and enhancement of soil quality , 1991 .

[53]  Rattan Lal,et al.  Erosion-crop productivity relationships for soils of Africa , 1995 .

[54]  P. M. Driessen,et al.  Land-use systems analysis , 1992 .

[55]  W. E. Larson,et al.  Residues for Soil Conservation , 2015 .

[56]  J. Stoorvogel,et al.  Calculating soil nutrient balances in Africa at different scales , 2004, Fertilizer research.

[57]  J. Stoorvogel,et al.  Assessment of soil nutrient depletion in sub-Saharan Africa: 1983-2000. , 1990 .

[58]  E. Smaling,et al.  Technologies for restoring soil fertility , 1996 .

[59]  R. Lal,et al.  Comparative assessment of several rainfall erosivity indices in Southern Nigeria , 1991 .

[60]  R. Lal.  Soil Erosion from Tropical Arable Lands and its Control , 1984 .

[61]  I. Scoones.  Dynamics and diversity: soil fertility and farming livelihoods in Africa. Case studies from Ethiopia, Mali and Zimbabwe. , 2010 .

[62]  M. Stocking,et al.  Developing a simple yet practical method of soil-loss estimation , 1982 .

[63]  Anthony J. Jakeman,et al.  A review of erosion and sediment transport models , 2003, Environ. Model. Softw..

[64]  de P. Willigen.  An analysis of the calculation of leaching and denitrification losses as practised in the NUTMON approach , 2000 .

[65]  L. R. Oldeman.  Soil Degradation: A Threat to Food Security? , 1997 .

[66]  C. Pieri.  Fertilité des terres de savanes. Bilan de trente ans de recherche et de développement agricoles au Sud du Sahara , 1989 .

[67]  H. Keulen.  Crop yield and nutrient requirements , 1986 .

[68]  Jill McCoy.  Using ArcGIS spatial analyst : ArcGIS 9 , 2001 .

[69]  A. Mokwunye,et al.  Alleviating soil fertility constraints to increased crop production in West Africa: The experience in the Sahel , 1991, Fertilizer research.

[70]  Joyotee Smith,et al.  The Role of Technology in Agricultural Intensification: The Evolution of Maize Production in the Northern Guinea Savanna of Nigeria , 1994, Economic Development and Cultural Change.

[71]  N. P. Woodruff,et al.  Wind erosion equation: computer solution and application. , 1970 .

[72]  John A. Dixon,et al.  Farming Systems and Poverty IMPROVING FARMERS' LIVELIHOODS IN A CHANGING WORLD , 2001 .

[73]  I. Burns,et al.  An equation to predict the leaching of surface-applied nitrate , 1975, The Journal of Agricultural Science.

[74]  Johan Bouma,et al.  Transfer functions and threshold values: from soil characteristics to land qualities. , 1987 .

[75]  C. Charreau,et al.  L'amélioration du profil cultural dans les sols sableux et sablo-argileux de la zone tropicale sèche ouest-africaine et ses incidences agronomiques (d'après les travaux des chercheurs de l'IRAT en Afrique de l'Ouest) , 1970 .

[76]  Herman van Keulen,et al.  Resource limitations in Sahelian agriculture , 2001 .