Conventional concentration of crop spraying

When crops show deficiency symptoms during the growing season, they need to pay for fertilizers, or crop diseases need to be combined with spraying. To add a little foliar fertilizer, we must pay attention to the appropriate concentration. Otherwise, we will not only receive less effective results, but also increase the effect. Big costs can even cause unnecessary losses and waste. What is the appropriate concentration of common foliar spray foliar fertilizers?

Urea is a 1%-1.5% aqueous solution, ie 100 kg of water plus 1%-1.5 kg of urea (hereinafter and so on). Superphosphate was mixed with 2%-3% aqueous potassium solution and stirred for 24 hours, then the clear liquid was sprayed. Potassium dihydrogen phosphate is 0.3%, that is, 300 grams of potassium dihydrogen phosphate plus 100 kilograms of water. The aqueous solution of zinc sulfate is 0.15-0.2%, and a small amount of lime solution may be added to the solution during spraying. Potassium sulfate is commonly used in concentrations of 1% to 1.5%. Ammonium molybdate is 0.05%-0.1%. Borax (or boric acid) is 0.2% to 0.3%. When preparing, use a small amount of 450C hot water to dissolve the borax in the right water. The plant ash is 5-7%. If you add water with hay ash and stir, let stand for 15 hours and filter. The common concentration of rare earths in vegetables and grain crops is 0.08% and that in fruit trees is 0.1%. The common concentration of the production-promoting bacteria on the crops is 15-30 milliliters of water for 40-45 kilograms, and the fruit trees are 80-100 milliliters for water 100-150 kilograms. Paclobutrazol is used in crops at a concentration of 25-50 mg/kg; fruit trees are in the range of 1000-1500 mg/kg. Rice vinegar is commonly used at a concentration of 250 ml of water at 0 kg.

Source: China Fertilizer Net

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