Answer: The apple tree basal fertilizer includes four methods: ring groove, strip groove, radial groove and garden spreading. The annular groove is fertilized by cutting the annular groove at the outer edge of the vertical projection of the canopy. The root distribution of the young tree is small. The fertilization method is used to induce the roots to develop around and in the depth direction; the strip groove is applied to the outer edge of the vertical projection of the tree crown. Internodes or between the two sides of the plant each trenching fertilization, each year to exchange the location of the ditch; radial groove at about 1 meter away from the trunk, with the trunk as the center, digging out of the radial groove 4 to 6 fertilization, the length of the trench beyond the projection of the crown In the margin, the fertilization is changed in the following year, and more methods are used for the adult tree fertilization; the whole garden applicator spreads the fertilizer evenly on the soil surface, and then plows into the soil, within 50 to 100 cm from the trunk (depending on the size of the crown). Do not spread fertilizer evenly in other places. This method is applicable to adult orchards with roots full of gardens.
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