But the key of planting Protection is the selection of grass seed and Sowing method.
而植草防护成败的关键是草种、播种期及播种方法的选择。
Sowing is the most key link among the crop production.
播种是整个农作物生产的最关键环节之一。
Appropriate sowing date helped improve productivity with respect to key inputs, while appropriately delayed crop rotation was awarding to annual economic productivity of rice and wheat.
适期播种有利于提高稻麦周年的一些关键性投入的生产力，适当延迟稻麦换茬时间可以提高稻麦周年经济生产力。
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