Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

Classifying, Monitoring and Improving Soil Nutrient Stocks and Flows in African Agriculture

Eric M. A. Smaling, Louise O. Fresco and Andre de Jager
Ambio
Vol. 25, No. 8 (Dec., 1996), pp. 492-496
Published by: Springer on behalf of Royal Swedish Academy of Sciences
Stable URL: http://www.jstor.org/stable/4314528
Page Count: 5
  • Download ($43.95)
  • Cite this Item
Preview not available
Preview not available

Abstract

Nutrient stocks and budgets (positive minus negative flows) are quantifiable indicators of sustainability, and are applied in this paper to classify agro-ecosystems. Earlier work revealed that most agricultural systems in sub-Saharan Africa (SSA) can be labelled nonsustainable due to low nutrient stocks and negative nutrient budgets. To increase production and build sustainable agro-ecosystems in SSA, technologies that rank under "integrated nutrient management" (INM) should be adopted, to save nutrients from being lost, and to add new nutrient supplies to the system. An account is given of the socioeconomic factors at national and farm level, the interplay of which determines the actual adoption rate of INM. Based on an overview of what we do know and what we don't know, an INM research agenda is proposed that is based on the knowledge gaps.

Page Thumbnails

  • Thumbnail: Page 
492
    492
  • Thumbnail: Page 
493
    493
  • Thumbnail: Page 
494
    494
  • Thumbnail: Page 
495
    495
  • Thumbnail: Page 
496
    496