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China: azolla propagation and small-scale biogas technology. Report on an FAO/UNDP study tour to the People's Republic of China, 21 May - 11 June 1978

FAO Soils Bulletin 41









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    China: recycling of organic wastes in agriculture. Report on an FAO/UNDP study tour to the People's Republic of China, 28 April - 24 May 1977
    FAO Soils Bulletin 40
    1977
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    In China the research group visited Peking, the Provinces of Jiangsu, Guangdong, Hebei, Shanxi and the municipality of Shanghai. The member of the group were deeply impressed by the agricultural, economic and cultural achievements of the People?s Republic of China. They gained valuable experience, especially in the field of recycling of organic wastes in agriculture which will be most useful in the development of agriculture in their own countries. The major part of the report is devoted to the main subject of the Study Tour and it emphasizes the practical aspects and applicability of the methods studied in China. At present, about two-thirds of the total nutrient intake is derived from natural manures and heavy reliance on these manures will continue because the Chinese have developed a long standing experience in matching the various types of organic manures to their local soils. While mineral fertilizers are relatively costly, organic manures are constantly available locally at litt le or no cost except in manpower.
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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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    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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