In the model, the leaf area index (LAI), crop coefficients, and root penetration and distribution were simulated for the winter wheat and summer corn double cropping system.
模型对冬小麦—夏玉米轮作体系作物叶面积指数、作物系数、根系生长与分布进行了模拟。
Based on simulated model of JiangNan Double Crop rice, growth and development status of early rice effected only by climate condition in ChangDe Area from1961to2000were simulated respectively.
以江南双季稻生长评估模型为工具，模拟了常德地区1961 - 2000年早稻的生长状况。
Through the qualitative test and performance test, it proved that the double hole can be used in precise seeding for tillering crop (such as wheat).
通过定性试验和性能试验，论证了复式型孔能够用于分蘖作物(小麦)的精量播种。
Millions of hectares of this year's wheat crop have been lost to the heat, drought and fires this summer in Russia—prompting U. S. wheat prices to double in a matter of days.
今年夏天，俄罗斯因为高温、干旱和大火损失了几百万公顷的小麦，这使得美国的小麦价格在几天时间里就翻倍了。
Double deck cutting device with small feeding load, more suitable for high crop harvesting.
双层切割装置，喂入负荷小，更能适应产量较高的作物收割要求。
Part of the land is double-crop.
部分土地在同一季内种植了两种作物。
The application of the double mulching technique not only raises crop yield, but also saves Labour and time, so the pure income is increased.
采用该技术不仅可稳产高产，而且省工省时，净收入增加。
Using the results of fuzzy cluster analysis, the rice producing areas for the first crop under double-rice pattern in Jiangsu Province were divided into 4 regions.
采用模糊聚类分析方法，将本省双季早稻产区分为太湖、宁镇、通扬和盐阜四个区。
Finally, the successive regression models for predicting the rice yield of the first crop under double-rice pattern in those regions were developed, with which, the rice yields in 1985 were...
通过逐段回归方法，分区建立了逐段预测模式，并作了1985年分区产量试报。
Finally, the successive regression models for predicting the rice yield of the first crop under double-rice pattern in those regions were developed, with which, the rice yields in 1985 were...
通过逐段回归方法，分区建立了逐段预测模式，并作了1985年分区产量试报。
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