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View the document1. Intensive sustainable livestock production: an alternative to tropical deforestation.
View the document2. Utilization of the african giant land snail in the humid area of nigeria.
View the document3. Important issues of small-holder livestock sector worldwide.
View the document4. Small ruminant production in developing countries.
View the document5. Microlivestock little-known small animals with a promising economic future.
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View the document14. Fish-farming in sub-Saharan Africa: case studies in the francophone countries - proposals for future action.
View the document15. Research and education for the development of integrated crop-livestock-fish farming systems in the tropics.
View the document16. Goats/fish integrated farming in the philippines.
View the document17. The sustainability of aquaculture as a farm enterprise in Rwanda.
View the document18. Double-cropping malaysian prawns, macrobrachium rosenbergii, and red swamp crawfish, procambarus clarkii.
View the document19. Rice/fish farming in Malaysia: a resource optimization
View the document20. Biotechnology in fishfarms: integrated farming or transgenic fish?
View the document21. Agricultural engineering in the development: tillage for crop production in areas of low rainfall.
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21. Agricultural engineering in the development: tillage for crop production in areas of low rainfall.

FAO Agricultural Services Bulletin 83, FAO, Rome, Italy; ISBN 92-5-102542-8; 1990, 119 p. + annex

The objective of this publication is to provide perspectives and guidelines in the formulation of tillage strategies for the low rainfall areas, where dry-farming is practiced.

A better understanding is needed of the effects of tillage on the soil physical, chemical, and biological environments and how these environments are altered by various tillage practices.

Conservation tillage systems have been developed in a number of countries where dryland farming is practiced, but the scope of development considerably lags behind that for more humid regions.

There is little published material available concerning the efficiency of traditional dry farming systems that have been developed in Africa and Asia.

The primary objectives of tillage in any cropping system are to control weeds, enhance soil water storage and retention, reduce erosion, and to prepare a desirable seedbed.

The success of dry-farming depends heavily on the ability of the farmer to conserve water, and also to establish a suitable environment for seed germination, root growth, and control of soil erosion.

Dry-farming is practiced in the low rainfall or semiarid regions, where average annual precipitation is generally less than 500 mm.

Soils are often shallow, sandy, low in organic matter, and highly vulnerable to erosion when the surface is unprotected. During the wet season high intensity rains may result in severe runoff and erosion, and this is often followed by dry periods and severe wind erosion.

Tillage systems are generally referred to as reduced, minimum, or low tillage systems and zero till.

Conservation tillage is a term that is widely used to denote tillage systems that emphasize water conservation and erosion control.

The chapters carefully analyze:

 

- tillage effects on soil physical properties,
- organic matter dynamics,
- erosion,
- plant response,
- alternative tillage,
- planting equipment.

Conclusions and recommendations are drawn specifically to:

 

- tillage practice,
- water infiltration and conservation,
- erosion control,
- soil fertility,
- crop response,
- tillage implements,
- planting equipment.

An integrated approach is required to meet the tillage objectives for optimum seed preparation, weed control, erosion control, water conservation, and preservation of organic matter.

This is a reference book to assist scientists and extension workers in explaining alternative tillage practices.

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