The air temperature and light condition and its effects on crop planting system in solar greenhouses are studied.

对日光温室内的温、光条件及其对作物种植制度的影响进行了研究。

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Also, the quantitative analysis was made of crop matching pro-portions in stable type planting system using linear planning method.

并通过线性归划的方法对稳定型种植制度的作物配制比例进行了定量化研究。

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At home, corn planting has multiplicity about specifications. At present, it is not-matching between corn harvester and planting system.

我国玉米种植规格多种多样，目前玉米收获机和种植制度、形式不匹配。

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The European system of approving such foods for sale on the shelves or for planting in the fields is a mishmash of national and supranational authorities that ends up blurring the line between scientific concerns and political interest.

ECONOMIST: Who��s afraid?