Over millions of years, nature has built up an intricate system of relationship of exchange and mutual dependence among its elements - land, water, air, forest, sunlight and living things - to create what we call the ecosystem. It is the life support system of all living things on this planet and provides not oniy the daily needs but also saves resources for future generations. But this very life support system is endangered by man's aggression against nature. In the last few decades, the aggression has reached unprecedented levels.

This paper states that, in Africa, smallholder agriculture is the main source of employment for the majority of the rural population and the bulk of the staple food is produced by this segment of the population.

Abstract
The persistent interplay of food production problems, land
degradation, and social and climatic difficulties on the Horn of
Africa result in recurring famines in spite of vast sums of money
spent on agricultural development. As land resources--which
undergird both social and production systems in Africa--become
increasingly degraded, development efforts, especially in
problematic areas, need to become part of comprehensive resource
use programs that take into account the existing regional land

Over the last 12 years a data base of climate, soils and crop distribution has been assembled for Latin America. Recently, socio-economic variables such as access and populations density and environmental variables such as the location of national parks, biological reserves and indian reserves have been added. Formerly this information was used primarily to make decisions on commodity research.

De ontwikkeling in het aantal vrijkomende landbouwbedrijven in Overijssel en het nieuwe gebruik daarvan wordt voor de periode 1983-'87 beschreven. De gegevens zijn d.m.v. een telefonische enquete verzameld. In de meeste gevallen wordt de bedrijfswoning nog steeds bewoond en staan de bedrijfsgebouwen leeg. Daarnaast is een prognose gemaakt van het aantal bedrijven dat in de periode 1987-'93 zal stoppen

The project was first conceived as a “Transnational project on the Management of Major Regional Aquifer in N.E. Africa” during the UNCOD held in Nairobi in 1977 and that it had been taken up by ADALCO in 1987. He pointed out that the sandstone aquifer occupying an area of about 2,000,0000 sq. km underlines the common border areas of Sudan, Egypt, Libya and Chad. Environmentally, it was observed that the zone has a relief characterized by a vast sandy plan, which is occasionally interrupted by scattered flat topped Nubaian plateaux and escarpments.

The purpose of this review is to discuss major measures for improving agricultural marketing extension in North Africa. In view of the special conditions of each individual country in the sub-region, the recommended measures are by necessity of general nature and are meant as general guidelines for discussions, The review is divided into four parts. The first part is introductory, giving a brief review of the economic and agricultural situation. The second part is an over view of the agriculture marketing and extension situation.

The mission to Holetta, Ethiopia was undertaken from January 22 to 26 following; receipt by the Director of the Joint ECA/FAO Agriculture Division of a request from the Head of the Training and Manpower Development Service of the Institute of Agricultural Research of Ethiopia for advice and assistance in servicing a national workshop on agricultural research.

The establishment of a self-sustaining process of economic growth and development is the internal affair of Africa. The continent's on-going economic crisis is rooted in major problems of mass poverty food shortage, low productive base and backward technology. Production subsidies continue to be one of the most potentially useful tool for attaining the food self-sufficiency goal of Africa. The purpose of this report is to examine the role that agriculture production subsidies can play in the goal of attaining food self sufficiency in Africa.