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Fertilizer use by crop in Cuba








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    Organic materials and soil productivity in the Near East. Papers presented at the FAO/SIDA Workshop on the Use of Organic Materials for Improving Soil Productivity in the Near East. Alexandria (Egypt), 9 Oct 1978
    FAO Soils Bulletin 45
    1982
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    This Bulletin contains the papers and proceedings of the FAO/SIDA Workshop on Organic Materials and Soil Productivity in the Near East. In view of the important complementary effect of organic materials to mineral fertilizers and their role in improving the soil?s physical properties, the Workshop has dealt with a wide variety of items on techniques and uses of the organic materials and wastes including, composting, bio-fertilizers and biogas, the environmental and health aspects, and action g uidelines for follow-up activities in the Near East countries. The purpose of this Workshop was to promote and maintain interest in the use of organic materials for improving soil productivity in the Near East Region and to assist Member Countries in developing action programmes to achieve these goals. The proceedings of the workshop present sound recommendations, the implementation of which would assist in improving the soil productivity, raising crop production levels and producing a bette r quality of life.
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    Fertilizer use by crop in Brazil 2004
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    Brazil is the world’s largest producer of coffee, sugar cane and citrus and is the world’s second largest producer of soybeans. Agricultural production has increased more than threefold during the past 30 years and the use of mineral fertilizers has increased correspondingly. Multidisciplinary agricultural research has permitted a major agricultural development of the Cerrado region, once considered to be marginal for agriculture. Advanced production techniques are used to produce the major expo rt crops. No-till systems are currently applied on almost 40 percent of the grain crop area. While yield levels of the major export crops are good, the average yields of food crops for domestic consumption are low. Most of the numerous small-scale, often subsistence, farmers use little or no fertilizers. Rural poverty is a major problem in some regions of Brazil and could be alleviated by improved agricultural productivity.
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    Application of nitrogen-fixing systems in soil improvement and management
    FAO Soils Bulletin No.49
    1982
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    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.

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