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Deep fertilization in the field includes: deep fertilization, turning the bottom fertilizer to the bottom of the plough layer while deep-turning, and the fertilization depth can reach about 20 cm; deep pine fertilization, random deep fertilization, base fertilizer during deep loosening operation Due to the deep depth of deep pine operation, generally 30-40 cm, the depth of fertilization should be controlled, not more than 30 cm; ridge and fertilization, when ploughing operation, using the fertilizing device on the ploughing plough, the bottom fertilizer is applied to the bottom of the ridge. Generally up to 15-20 cm; sowing and fertilizing, using the fertilizing device on the planter, with the application of the bottom fertilizer and mouth fertilizer, the general fertilizer is applied to the seed bed 5-15 cm, the seed side 3-5 cm, if the machine can meet deeper Fertilization function, it is necessary to layer fertilization, must ensure that 5-15 cm, 3-5 cm, 5-10 cm of plough layer has fertilizer; cultivating and topdressing, late corn topdressing to promote late growth and development and increase yield The role of topdressing and topdressing when the topdressing depth reaches about 10 cm, should be dominated by furrows and topdressing, the time and the mid-cultivation operation simultaneously, to reach the deep ditch, shallow cover soil, more soil.
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