Answer: The method of soil fertilization is to excavate a circular ring ditch within the drip line of the crown of the chestnut. The width of the ditch is 25 cm and the depth is 20 cm. Each plant applies 1 kg of calcium phosphate, 0.3 kg of urea and 0.25 kg of borax. When fertilizing, urea and borax should be dissolved in water first, and then ditching and applying water while applying fertilizer. Extra-root dressing method: 0.3% to 0.4% urea solution, 0.3% to 0.5% potassium hydrogen phosphate solution and 0.3% to 0.4% borax solution are mixed, and spray the canopy after 9:00 AM on sunny days or after 3 PM. 10 days and then spray - times, you can even spray twice. Metal Security Seals,Metal Bolt Seal,Metal Tamper Seals,Metal Truck Seals Wenzhou Haoshi Light Industrial Products Co., LTD , https://www.economicseals.com
Chestnut summer fertilization?