How to topdress the rapeseed can increase the yield? The rapeseed planting should be topdressed according to the local soil soil condition and the growth and development of rapeseed. Generally speaking, when the first true leaf is flattened after the emergence of rapeseed, the top dressing should be carried out. Generally, a low concentration of 1,500 kg of human and animal excrement per acre is applied. One week before transplanting, 1000-1500 kg of urea or 3-4 kg of urea was applied per mu. In the middle, you should follow the seedlings and chase again. If the seedlings grow normally, they may not be applied; if the leaves turn from green to yellow, the growth is slow, and 0.25 kg of urea per acre can be poured on the water.
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