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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Kết quả 1-5 trong 48
Trang 10
... reducing dependence on low - cost staples . Spread of potatoes to other parts of the world Potatoes reached most other parts of the world through the European colonial powers , rather than directly from South America . North America ...
... reducing dependence on low - cost staples . Spread of potatoes to other parts of the world Potatoes reached most other parts of the world through the European colonial powers , rather than directly from South America . North America ...
Trang 18
... reduced the area and production of potatoes . In developing areas , with the exception of Asia , potato yields have increased at least as much as cereal yields and much more than yields of other root crops . Improvements in varieties 18 ...
... reduced the area and production of potatoes . In developing areas , with the exception of Asia , potato yields have increased at least as much as cereal yields and much more than yields of other root crops . Improvements in varieties 18 ...
Trang 21
... reduced the share of the crop that must be reserved for seed . In contrast to the immense international trade in the major cereal grains , only a small portion of the world's potatoes- about 2 percent - are exported on international ...
... reduced the share of the crop that must be reserved for seed . In contrast to the immense international trade in the major cereal grains , only a small portion of the world's potatoes- about 2 percent - are exported on international ...
Trang 33
... reduces the vigor of the crop grown from them . Light retards sprout growth , and potatoes that are stored in light develop green sprouts that are much shorter and sturdier than sprouts on tubers stored in the dark . Consequently ...
... reduces the vigor of the crop grown from them . Light retards sprout growth , and potatoes that are stored in light develop green sprouts that are much shorter and sturdier than sprouts on tubers stored in the dark . Consequently ...
Trang 34
... reducing diseases are trans- mitted by seed tubers . Some , such as 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 ...
... reducing diseases are trans- mitted by seed tubers . Some , such as 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 ...
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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