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 13
... rates , for example , are usually assumed to be near the rates prevailing in developed countries . However , farmers in many developing areas actually use lower rates . Estimates of waste and the amounts of potatoes that are fed to ...
... rates , for example , are usually assumed to be near the rates prevailing in developed countries . However , farmers in many developing areas actually use lower rates . Estimates of waste and the amounts of potatoes that are fed to ...
Trang 21
... rates significantly affect the amount of potatoes avail- able for human consumption . Most potato growers must plant 1 or 2 tons of seed tubers per hectare , which is commonly 10 to 15 percent of the harvest , but can be over 20 percent ...
... rates significantly affect the amount of potatoes avail- able for human consumption . Most potato growers must plant 1 or 2 tons of seed tubers per hectare , which is commonly 10 to 15 percent of the harvest , but can be over 20 percent ...
Trang 33
... rate . However , per unit weight , small seed produces higher yields than large seed of equal health and physiological condition . The period between planting and crop emergence is the most delicate stage of the potato crop's growth ...
... rate . However , per unit weight , small seed produces higher yields than large seed of equal health and physiological condition . The period between planting and crop emergence is the most delicate stage of the potato crop's growth ...
Trang 35
... Rate of bulking -foliage Aug. Sept. --tubers Figure 6. Growth cycle of a potato crop . Adapted from : H. P. Beukema and D. E. van der Zaag , Potato improvement ( Wageningen : International Agricultural Centre , 1979 ) . may be desirable ...
... Rate of bulking -foliage Aug. Sept. --tubers Figure 6. Growth cycle of a potato crop . Adapted from : H. P. Beukema and D. E. van der Zaag , Potato improvement ( Wageningen : International Agricultural Centre , 1979 ) . may be desirable ...
Trang 36
... rate is related to the hours of daylight ; hence , bulking tends to be more rapid in long - day temperate zones than in the tropics . Differences in final yield are offset by a longer growing season in some tropical areas , but in ...
... rate is related to the hours of daylight ; hence , bulking tends to be more rapid in long - day temperate zones than in the tropics . Differences in final yield are offset by a longer growing season in some tropical areas , but in ...
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Potatoes: Production, Marketing, And Programs For Developing Countries Douglas Horton Xem trước bị giới hạn - 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