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 32
Trang 21
... losses and as increasing yields have 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 ...
... losses and as increasing yields have 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 ...
Trang 30
... , provides good protection against microorganisms , and resists water loss . But if potatoes are grown in waterlogged soil , the lenticels of the tubers open wide , permitting easy entry of harmful. 30 The crop and its environment.
... , provides good protection against microorganisms , and resists water loss . But if potatoes are grown in waterlogged soil , the lenticels of the tubers open wide , permitting easy entry of harmful. 30 The crop and its environment.
Trang 31
... loss until the wound heals - a process that can take 3 to 5 days under favorable conditions ( an environment with sufficient oxygen , temperatures between 10 and 20 degrees C , and around 90 percent relative humidity ) . The remainder ...
... loss until the wound heals - a process that can take 3 to 5 days under favorable conditions ( an environment with sufficient oxygen , temperatures between 10 and 20 degrees C , and around 90 percent relative humidity ) . The remainder ...
Trang 34
... losses from virus diseases is related to the type of virus , the virus tolerance of the variety planted , and the growing conditions . When all plants in a field are infected with an aggressive virus like potato leaf roll virus , yields ...
... losses from virus diseases is related to the type of virus , the virus tolerance of the variety planted , and the growing conditions . When all plants in a field are infected with an aggressive virus like potato leaf roll virus , yields ...
Trang 40
... losses , survive a long time in the soil , or attack other crops in addition to potatoes . Diseases can spread through seed , soil , implements , insect carriers ( vectors ) , and other means . Because of the importance of seed tubers ...
... losses , survive a long time in the soil , or attack other crops in addition to potatoes . Diseases can spread through seed , soil , implements , insect carriers ( vectors ) , and other means . Because of the importance of seed tubers ...
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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 |
Thuật ngữ và cụm từ thông dụng
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