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 31
Trang 31
... temperatures between 10 and 20 degrees C , and around 90 percent relative humidity ) . The remainder of the tuber from the vascular ring inward , designated as the medullary area , is divided into outer and inner medulla and constitutes ...
... temperatures between 10 and 20 degrees C , and around 90 percent relative humidity ) . The remainder of the tuber from the vascular ring inward , designated as the medullary area , is divided into outer and inner medulla and constitutes ...
Trang 32
... temperatures ( as in northern Europe ) . Storage conditions , particularly temperature , have significant influences on dormancy and sprout growth . Tubers stored under high temperatures , high relative humidity , and in darkness have ...
... temperatures ( as in northern Europe ) . Storage conditions , particularly temperature , have significant influences on dormancy and sprout growth . Tubers stored under high temperatures , high relative humidity , and in darkness have ...
Trang 33
... temperatures and sprout growth starts in the maturity stage , many eyes will develop sprouts . Storage temperature and exposure of tubers to light strongly influence sprout growth and the resulting vigor of seed tubers . Sprouts occur ...
... temperatures and sprout growth starts in the maturity stage , many eyes will develop sprouts . Storage temperature and exposure of tubers to light strongly influence sprout growth and the resulting vigor of seed tubers . Sprouts occur ...
Trang 34
... temperatures and high humidity may behave as relatively young seed even after 8 or 9 months of storage . Young seed tends to be more vigorous than old seed and produces a later - maturing crop with a higher potential yield . Disease ...
... temperatures and high humidity may behave as relatively young seed even after 8 or 9 months of storage . Young seed tends to be more vigorous than old seed and produces a later - maturing crop with a higher potential yield . Disease ...
Trang 36
... temperatures , particularly low night temperatures , stimulate tuber initiation ; varieties of the andigena subspecies , however , mature late under short days . Soil temperatures of 15 to 18 degrees C appear to be the most favorable ...
... temperatures , particularly low night temperatures , stimulate tuber initiation ; varieties of the andigena subspecies , however , mature late under short days . Soil temperatures of 15 to 18 degrees C appear to be the most favorable ...
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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