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Book (stand-alone)Tillage systems for soil and water conservation
FAO Soils Bulletin No. 54
1984Also available in:
No results found.The increasing world population is resulting in intensified cropping of the limited areas of arable land to provide the necessary food in some countries. Unless effective conservation practices are used, such intensive cropping tends to increase the loss of soil and water resources. This trend must be reversed. The objectives of the Soils Bulletin are to present the principles and practices if tillage systems for sustained food production and to create an awareness of the need to conserve the world?s soil water energy resources for future generations. Although energy is an integral part of tillage systems, the emphasis is on soil and water conservation. This bulletin emphasizes tillage systems for developing countries, but relies heavily on principles that have been developed throughout the world. The need for more research on conservation tillage in developing countries is stressed. -
Book (stand-alone)Improved production systems as an alternative to shifting cultivation
FAO Soils Bulletin No. 53
1984Also available in:
No results found.Shifting cultivation, under its diverse forms of slash and burn system, is a traditional method of cultivating tropical upland soils, mostly for subsistence purposes. This traditional system of cultivation is in ecological balance with the environment and does not irreversibly degrade the soil resource, provided a sufficient length of fallow is allowed for soil restoration. However, increasing population pressures necessitate more intensive use of land. The consequence is extended cropping perio ds and shortened fallows. In the extreme, short fallow periods are no longer adequate to restore the soil?s productive capacity. The present set of papers is the result of an expert consultation on the subject. The object of the consultation was to provide guidelines for future activities and policy decisions in this subject area. The ultimate objective is to provide feasible alternatives for improving these practices or replacing them with systems of permanent cropping.
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