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Janeiro 1991

This article uses cross-sectional evidence from Ghana, Kenya, and Rwanda in 1987–88 to examine the question, Are indigenous land rights systems in Sub-Saharan Africa a constraint on productivity? The evidence supports the hypothesis suggested by historical studies, that African indigenous land…

Dezembro 1989

This document contains a collection of critical comments by experts working in the field of pastoralism with regard to several PDN papers.

Dezembro 1989

Ever since colonial administrators and western trained scientists became involved in sub-Saharan Africa in the early 20th century and were faced with the task of governing countries where livestock production was a major economic enterprise, the proper utilisation of rangelands became a major…

Dezembro 1989

This article suggests that communual rangeland management policies in Botswana and Zimbabwe are based on incorrect technical assumptions about the stability of semiarid rangelands, the nature of rangeland degradation, and the benefits of destocking. Consequently, inappropriate policies,…

Dezembro 1989

In their recent paper, de Leeuw and Tothill (1990) discussed the shortcomings of estimating carrying capacity (CC) of pastoral systems in Africa. They noted the difficulty of determining available forage per animal due to high annual and spatial variability in plant production, seasonal changes…

Dezembro 1988

Carrying capacity (CC) is a term often talked about in relation to livestock in the communal areas (CAs). It is the source of much confusion. This discussion paper will hopefully clarify some of the issues and make the implications for the policy debate clearer. It is based on the preliminary…

Dezembro 1988

It is clear from the failure of our efforts in many countries to halt the desertification process - deserts are now advancing at a rate of nearly 15,000,000 acres a year worldwide (Worrall 1984) (that something was missing in our knowledge of the problem). Four discoveries have been made that…

Dezembro 1988

This article begins with an investigation into woodland management in Mali and moves onto a discussion of some of the fundamental practical problems associated with a major part of forest policy in Mali. The article focuses on how to increase villagers' control and management of their…

Conference Papers & Reports
Dezembro 1988

Presents papers and abstracts on the management of vertisols in sub-Saharan Africa and other parts of the world. Overviews the importance, distribution, agroclimatology and properties of vertisols and the Indian Vertisol technology experience. Reviews resource assessment and management and…

Conference Papers & Reports
Dezembro 1988

Several traditional methods of maintaining soil fertility in bean-based cropping systems are reviewed as follows: visoso, large- scale chitemene, ngoro or matengo pit (Mbinga District, Tanzania), mambwe land-use system of northern Zambia (fundikila), mounds of the Wafipas (SW Tanzania), tumba…

Dezembro 1987

This article discusses the enclosure of rangelands and registration of exclusive rights to grazing by individuals or groups of pastoralists. This trend has been increasing greatly over the last twenty years. This occurs because:it is encouraged by governments, planners and multi-lateral donor…

Dezembro 1987

This article investigates the encroachment on pastoralist grazing land in Sudan (as a result of the mechanised farming in the Sudan). The article finds that:the Lahawin pastoralists have been forcibly resettled in areas where the resources for subsistence agriculture does not existthe Lahawin…