The application rate of fertilization amount of wax fertilizer is determined by the condition of the seedlings. The seedlings are good, and the application of coarse fertilizer is mainly for heat preservation. If the seedlings are poor, more fertilizer is applied to supply nutrients. Generally, 1200-1500 kg of soil-fertilized fertilizer or 700-800 kg of decomposed pig cow manure is applied per mu, and 10-15 kg of superphosphate is applied. For rapeseed that is prematurely yellowed due to lack of nitrogen, 400 kg of manure and 5 to 6 kg of urea are applied per mu.

Fertilization time The application time of the wax fertilizer should be determined by the fertilizer due to the seedlings. The larger soil fertilizer and the early application of the pig cow manure must be applied before the rapeseed is sealed and the field is easy to operate. The quick-acting chemical fertilizer or human excrement applied with water is generally applied from the winter solstice to the small cold. Fertilization must be combined with cultivating soil and roots to bury the fertilizer in the soil.

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