Potatoes: Production, Marketing, And Programs For Developing CountriesInternational Potato Center, 23 thg 4, 1987 - 243 trang World patterns and trends in potato production and use; The potato crop and its physical environment; The socioeconomic environment: Levels of development and public policies; Supply, demand, and marketing; Potato nutrition and consuption; Potato production systems; Research priorities and potato programs; Impact of potato programs; Summing up. |
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Trang 8
... late in the season - September or October - when the natural daylength shortens to about 12 hours . Consequently , Soviet botanists believed this subspecies could not have been the one first introduced in Europe . Experiments have shown ...
... late in the season - September or October - when the natural daylength shortens to about 12 hours . Consequently , Soviet botanists believed this subspecies could not have been the one first introduced in Europe . Experiments have shown ...
Trang 9
... late blight ravaged potatoes . This fungal disease destroys stems and foliage . The ensuing " potato famine " was the worst European disaster since the Black Death 500 years before . A million people died and 1.5 million emigrated , out ...
... late blight ravaged potatoes . This fungal disease destroys stems and foliage . The ensuing " potato famine " was the worst European disaster since the Black Death 500 years before . A million people died and 1.5 million emigrated , out ...
Trang 11
... late seventeenth century , they began expanding its cultivation in cooler , less fertile areas . It is not known when the potato reached Korea , but Koreans have long grown the crop , and in some mountainous areas , potatoes are an ...
... late seventeenth century , they began expanding its cultivation in cooler , less fertile areas . It is not known when the potato reached Korea , but Koreans have long grown the crop , and in some mountainous areas , potatoes are an ...
Trang 12
... Late in the nineteenth century , the Turks promoted potato cultivation in the plain of Erzerum , which is still a major production zone . In sub - Saharan Africa , introduction of the potato followed colonization . And just as the ...
... Late in the nineteenth century , the Turks promoted potato cultivation in the plain of Erzerum , which is still a major production zone . In sub - Saharan Africa , introduction of the potato followed colonization . And just as the ...
Trang 34
... late blight , are easily spread during the growing season . Others , such as bacterial wilt , can also remain in the soil for several years . The most important diseases transmitted by seed tubers are virus diseases . Preventing virus ...
... late blight , are easily spread during the growing season . Others , such as bacterial wilt , can also remain in the soil for several years . The most important diseases transmitted by seed tubers are virus diseases . Preventing virus ...
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Potatoes: Production, Marketing, And Programs For Developing Countries Douglas Horton Xem trước bị giới hạn - 2019 |
POTATOES: Production, Marketing, and Programs for Developing Countries DOUGLAS. HORTON Không có bản xem trước - 2019 |
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Africa agricultural agricultural research America areas average Bangladesh blight breeding capita Central cereals changes commodity consumers costs crop cultivation demand depends developing countries diseases early economic effect estimates Europe example expand farmers farms fertilizers field food crops growing grown growth harvest hectare higher highland impact important improved income increase India inputs insect institutions International Potato Center land late less levels Lima limited losses lower lowland major Mantaro Valley needs North percent period Peru pests plant policies population potato consumption potato crop potato prices potato production potato programs practices priorities problems processing projections rates reduce regions relative requirements research and extension resistance result rice root Rwanda season seed tubers selection soil South South Korea sprout storage stored supply Table temperate temperatures tons tropical usually varieties vegetable virus yields zones