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Book (stand-alone)Application of nitrogen-fixing systems in soil improvement and management
FAO Soils Bulletin No.49
1982Also available in:
No results found.In view of the continuing increase in cost and scarcity of mineral fertilizers resulting from the use of high-cost fossil energy, there is renewed interest in organic recycling and biological nitrogen-fixation to improve soil fertility and productivity. The workshop in Alexandria recommended the further promotion of research, development, application and dissemination of information available on various aspects of biological nitrogen-fixation, including symbiotic systems of rhizobia/legume and Azolla/blue-green algae, and free-living nitrogen-fixing bacteria and blue-green algae. It is hoped that the compilation of various aspects of nitrogen-fixation under one cover in this Bulletin will be of interest and assistance to research workers and extension planners concerned with the further development and refinement of these natural systems for soil improvement and management. -
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)Soil and plant testing and analysis. Report of an Expert Consultation, Rome, 13-17 June 1977
FAO Soils Bulletin 38/1
1980Also available in:
No results found.Methods for evaluating nutrient status in order to obtain better plant growth and increased yield are constantly being developed and improved. New analytical techniques and procedures for soil and plant analysis have been invented and tested in many countries and laboratories. There have been innovations in data processing leading to preparation of more refined and specific fertilizer recommendations. The purpose of the Consultation was: i. to review advances in a) methodologies for soil and plant chemical analysis, and b) interpretation of the results obtained and the preparation of fertilizer recommendations based on these results. ii. to identify progress made and areas requiring further attention with regard to the organization of soil testing services in general and, in particular, in developing countries.
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