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Showing items 1 through 9 of 12.
  1. Library Resource
    Journal Articles & Books
    December, 1982
    Egypt, Nigeria, Iraq, Australia, Ghana, Congo, Sierra Leone, Cameroon, New Zealand, Rwanda, Philippines, South Africa, Vietnam, Japan, Madagascar, Tanzania, India, Romania, Brazil, Cuba

    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.

  2. Library Resource
    Journal Articles & Books
    December, 1982
    Colombia, South America, Central America

    La produccion comercial de semillas de Andropogon gayanus es potencialmente factible, pero es necesario desarrollar tecnologia apropiada para la cosecha y el beneficio. Problemas inherentes al cultivo, como su altura en la madurez y el desuniforme y amplio rango de distribucion de las semillas, han dificultado la implementacion de los metodos mecanicos tradicionales de recoleccion. Ademas, las caracteristicas morfologicas de las espiculas y la presencia de aristas, espiculas esteriles y abundante pelusa ocasionan problemas particulares en el beneficio de las semillas de esta especie.

  3. Library Resource
    Journal Articles & Books
    December, 1982
    Colombia, South America, Central America

    Se presenta informacion preliminar acerca del proceso y las causas de sucesion de sabanas de Trachypogon vestitus y de Paspalum pectinatum despues de quema y pastoreo, en Carimagua, Colombia. En varios expt. en los cuales se aplicaron diferentes tasas de carga a parcelas con y sin quema, se observo que la cobertura de plantas tendio a ser mayor en las parcelas con quema, a la mayor tasa de carga y al inicio y al final de la epoca seca. La quema y el pastoreo no afectaron el no. de plantas emergentes. Despues de la quema y con tasa de carga baja, T. vestitus predomino en la sabana de P.

  4. Library Resource
    Journal Articles & Books
    December, 1982
    Egypt, Switzerland, Japan, Vietnam, Chile, Jordan, China, Germany, Indonesia, Brazil, Argentina, India, Republic of Korea, Hungary, Thailand, Asia, Africa

    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 guidelines for follow-up activities in the Near East countries.

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