| 词汇 | cropping |
| 释义 | cropping present participle ofcrop Examples of croppingcropping Results identify cropping system, area under cultivation, consumption requirements and crop prices as important determinants of sustainability. This would require massive deforestation around the world, and conversion of many fragile hillsides and drylands to cropping for which they are environmentally unsuitable. As a result, they cannot consider the impact of cropping activities on the natural processes that support fertility recovery. Through the 1970s and 1980s, a cropping/far ming systems approach was added to the research agenda, including research on optimum rotations and cover crops. Blends and component cultivars had similar net returns under all cropping systems tested. The average of cropping systems demonstrated the same pattern of net return. The economic analysis was based on estimates of the costs and returns of each cropping system. There is, however, a need to improve relay cropping management strategies. Farms are small, cropping intensity is high and the extent of mechanization is low but increasing. The same rates of fertilizer were used at planting and after harvest for both cropping cycles. Values are means for two summer cropping seasons, 1989 and 1990. The effect of cropping sequences and rotational management : an economic comparison of conventional, integrated and organic systems. At medium intensity or cropping this system is thus recommendable to land-constrained poor farmers who do not use external inputs such as fertilizer. However, in the present experiments, differences in egg-to-larva mortalities between cropping patterns were not significant. Despite this, the intercropping system is generally more advantageous than sole cropping. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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