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 41
... resistant varieties and detection and elimination of infected plants and their tubers from seed fields and stocks . Some of the costliest virus diseases , such as leaf roll , are commonly transmitted by insects . Generally , tubers ...
... resistant varieties and detection and elimination of infected plants and their tubers from seed fields and stocks . Some of the costliest virus diseases , such as leaf roll , are commonly transmitted by insects . Generally , tubers ...
Trang 42
... resistant to late blight , but several varieties bred in developing countries are . The most notable progress in selecting for late blight resistance has been made in Mexico , where several new resistant varieties have been identified ...
... resistant to late blight , but several varieties bred in developing countries are . The most notable progress in selecting for late blight resistance has been made in Mexico , where several new resistant varieties have been identified ...
Trang 43
... resistance is an important strategy for control of this disease . Insects and nematodes . In many potato growing areas , as fallow periods have been eliminated and rotations have intensified , insect populations have increased . Many ...
... resistance is an important strategy for control of this disease . Insects and nematodes . In many potato growing areas , as fallow periods have been eliminated and rotations have intensified , insect populations have increased . Many ...
Trang 44
... resistance is potentially one of the most effective and economic means for controlling nematodes . Breeding for cyst nematode resistance began in Europe after discovery of resistance in a few native Andean varieties and related weedy ...
... resistance is potentially one of the most effective and economic means for controlling nematodes . Breeding for cyst nematode resistance began in Europe after discovery of resistance in a few native Andean varieties and related weedy ...
Trang 45
... resistance to major pests and diseases and as sources of adaptation to environmental conditions like frost , heat , and drought . New approaches have been developed for breeding at the diploid level and returning later to the tetraploid ...
... resistance to major pests and diseases and as sources of adaptation to environmental conditions like frost , heat , and drought . New approaches have been developed for breeding at the diploid level and returning later to the tetraploid ...
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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