How to supplement boron and zinc after chestnut production:
Chestnut postpartum foliar application. As an auxiliary measure for soil fertilization, it has the advantages of simple method, less fertilizer, quick effect, high utilization rate, and no influence on tree nutrient redistribution. Foliar spraying is usually carried out by using 0.2% borax plus 0.2% zinc sulfate in combination with a new high-fat film 600 times solution. Time should be chosen when the morning dew is not dry or in the evening, wet and windless weather. Linyi Fertilizer Network Copyright
After chestnut picking, in the area where the canopy drip line is the most distributed of the fibrous roots, the ditch is 1 m long, 0.4 m wide and 0.6 m deep, and the boron-zinc micro-fertilizer and other organic fertilizer are applied, and then the soil is covered. The amount of boron and zinc applied is calculated by the size of the canopy, and each application of 10-30 g of boron zinc per square meter. For the large tree, 100 g of borax and zinc sulfate can be applied. The application of boron and zinc fertilizer once in the soil has obvious effects in five years. Linyi Fertilizer Network Copyright
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