Recognition on the urgency for establishing seed systems, to improve seed varieties in developing countries, began in the 1960s, when national and international support for this activity was given mainly to the public sector. However, of the total value of seeds used worldwide, only a thirty percent is sold commercially by private firms, of which farmer-saved seed accounts for thirty five percent, and public sector enterprises produce the remaining...
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ПОДРОБНАЯ ИНФОРМАЦИЯ
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1994/06/30
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Информационный бюллетень
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21056
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1
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1
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2010/07/01
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National seed systems - getting high-quality seeds to farmers
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agency for international development
ФАЙЛЫ ДЛЯ СКАЧИВАНИЯ
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Официальная версия документа (может содержать подписи, и т.д.)