The concentration of foliar fertilizer should be appropriate. Since foliar fertilizer is sprayed directly on the upper leaves of crops, the buffering effect of crops on fertilizer is very small. Therefore, we must master the spraying concentration of foliar fertilizer. If the concentration is too low, the amount of nutrient elements contacted by crops is small, and the effect is not obvious. Too high concentration will often burn the leaves and cause fertilizer damage. The agricultural pesticide spray concentration of the same foliar fertilizer on different crops is not the same, it should be determined according to the type of crop. The acidity of the foliar fertilizer should be appropriate, and the nutrient elements have different existence states under different pH levels. To maximize the benefits of fertilizers, there must be a proper acidity range. Generally, the pH value is required to be between 5 and 8. The pH value is too high or too low, in addition to affecting the absorption of nutrients, it will also cause harm to crops. Adding additives, when the flight controller uses the crop spray drone to spray the fertilizer solution on the leaves, the appropriate additives can be added to improve the adhesion of the fertilizer solution on the plant leaves and promote the absorption of fertilizer.
