Fertilizer: The seed fertilizer is generally embedded in the lower part or the lower part of the seed. The fertilizer and the seed should be kept at an appropriate distance to avoid burning the seed. This distance is generally 3 to 5 cm under the seed, such as greater than 5 cm and appropriate suppression, the effect is better. Fertilization should also consider the fan-shaped area reached by the roots of the crop. Under normal circumstances, when the seeds themselves are depleted, the wheat can be rooted 5-8 cm, the fan angle is about 60 degrees, the corn roots are 5-7 cm, and the fan angle is about 90 degrees. .
Top dressing: The root system of the plant has been initially developed during topdressing. If mechanical topdressing is used, the root should be minimized, the depth of fertilization should not be too large, and the horizontal distance (side distance) from the plant should be appropriate. Under normal circumstances, the depth of crops between crops, wheat, and other narrow crops is 6-8 cm. The depth of wide crops such as corn and cotton is 8-12 cm, and the lateral distance is 10-15 cm.
Base fertilizer: The bottom fertilizer is often 15 to 20 cm or more. There are two methods for fertilizing the bottom of the plow: one is to first spread the fertilizer on the surface and then plow it into the soil, that is, before the plow; the other is to apply the fertilizer to the furrow while plowing the work, that is, plowing the ditch . The latter is better than the latter.
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Metallraphic Polishing Paste
Polishing paste is the polishing material (such as diatomite, quartz sand, pumice, iron Dan, Vienna lime and chromium oxide, etc.) and some binder (such as stearic acid, paraffin, etc.) together into the form of oil paste. Polishing paste is generally divided into white, red, green three kinds, according to the material of polishing products is different, should choose different polishing paste
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