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 39
Trang 11
... storing them in the lowlands . The potato arrived in China around 1700 from the Dutch East Indies ( now Indonesia ) . Introductions were also made to northern China from Russia . Potato production spread throughout the country and is ...
... storing them in the lowlands . The potato arrived in China around 1700 from the Dutch East Indies ( now Indonesia ) . Introductions were also made to northern China from Russia . Potato production spread throughout the country and is ...
Trang 32
... stored . Varieties differ markedly in length of dormancy , and this char- acteristic often influences the varietal preferences of farmers . Potatoes grown under high temperatures , especially at the end of the growing period , and under ...
... stored . Varieties differ markedly in length of dormancy , and this char- acteristic often influences the varietal preferences of farmers . Potatoes grown under high temperatures , especially at the end of the growing period , and under ...
Trang 33
... stored at temperatures higher than about 4 degrees C. Excessive sprout growth causes dehydration of the tubers and reduces the vigor of the crop grown from them . Light retards sprout growth , and potatoes that are stored in light ...
... stored at temperatures higher than about 4 degrees C. Excessive sprout growth causes dehydration of the tubers and reduces the vigor of the crop grown from them . Light retards sprout growth , and potatoes that are stored in light ...
Trang 34
... stored at low 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 ...
... stored at low 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 ...
Trang 53
... stored , providing a welcome degree of food security in this harsh and risky envi- ronment . Higher yielding , late - maturing varieties with little frost resistance and long periods of dormancy were selected for in- termediate ...
... stored , providing a welcome degree of food security in this harsh and risky envi- ronment . Higher yielding , late - maturing varieties with little frost resistance and long periods of dormancy were selected for in- termediate ...
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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