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 20
Trang 32
... insects or that have been damaged , by cutting for example , also have a shorter dormant period than healthy , undamaged tubers . If a tuber starts sprout growth during the apical dominance stage , only one of the buds at the apex will ...
... insects or that have been damaged , by cutting for example , also have a shorter dormant period than healthy , undamaged tubers . If a tuber starts sprout growth during the apical dominance stage , only one of the buds at the apex will ...
Trang 40
... in addition to potatoes . Diseases can spread through seed , soil , implements , insect carriers ( vectors ) , and other means . Because of the importance of seed tubers as a source of infection , quarantine 40 The crop and its environment.
... in addition to potatoes . Diseases can spread through seed , soil , implements , insect carriers ( vectors ) , and other means . Because of the importance of seed tubers as a source of infection , quarantine 40 The crop and its environment.
Trang 41
... insects . Generally , tubers produced in cool , rainy and windy areas ( such as Scotland , southern Chile , and tropical highland zones ) have little virus infection because populations of virus- transmitting insects , particularly ...
... insects . Generally , tubers produced in cool , rainy and windy areas ( such as Scotland , southern Chile , and tropical highland zones ) have little virus infection because populations of virus- transmitting insects , particularly ...
Trang 43
... insect has high reproductive potential , and its resistance to insecticides appears to be rising . Most potato varieties are highly vulnerable in the field and in storage . Insects damage crops both directly and indirectly . Where insect ...
... insect has high reproductive potential , and its resistance to insecticides appears to be rising . Most potato varieties are highly vulnerable in the field and in storage . Insects damage crops both directly and indirectly . Where insect ...
Trang 60
... insect populations , which have cut yields even further . Because different types of farmers - small subsistence growers , large commercial farmers , market - gardeners , production coop- eratives have different technological ...
... insect populations , which have cut yields even further . Because different types of farmers - small subsistence growers , large commercial farmers , market - gardeners , production coop- eratives have different technological ...
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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