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This not unfamiliar theme was formerly justified on the grounds that technological transformation was necessary in African farming and pastoral systems in order to support improved incomes and living standards, and narrow the gap between rich and poor, north and south. Adoption was usually (but not always) voluntary, and the search to explain why African smallholders were often reluctant to embrace the new technologies and systems looked for economic or cultural bottlenecks. Latterly, however, inappropriate land use is believed to be setting up irreversible trends of degradation.

Cloudsley-Thompson 1984) And: People are the producers of desertification. Why has there been the temptation to maximize the natural causes and to minimize the human responsibilities? (Mainguet 1994: vii) Since the drylands are occupied predominantly by African smallholders it follows that indigenous technologies and systems of natural resource management are deemed inappropriate in expert judgement — at current population densities. What are the policy implications of such a stance? There are two.

Many governments did not recognise the enormity of the desertification threat, or appreciate the costs or complex processes of desertification' (Buonajuti 1991: 31; Odingo 1992). Africa, 'the bedeviled continent' (Kassas et al. 1991: 20), continued to attract the greatest attention, if not the necessary funds. Endless repetition of time-hallowed associations between population growth, over-exploitation and degradation continued to substitute for research; and global assessments continued to make extensive use of approximations and assumptions (Dregne et al.

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