As long as the "open" can be sprayed, wrong!
Many farmers believe that no matter what kind of fertilizer, as long as they are "turned on", they can be used as foliar fertilizers, but it is not. Such as very volatile fertilizers such as ammonia, ammonium bicarbonate, etc., if foliar fertilizer spray, high temperature will cause damage to crops after burning, burn the leaves, so can not be applied as foliar fertilizer.
The higher the spray concentration, the better, wrong!
Some farmers think that the greater the concentration of the foliar spray fertilizer solution, the better. This is not true. For example, high nitrogen water soluble fertilizer should only be below 1%, and potassium dihydrogen phosphate should only be below 1%. More medium and trace element fertilizers such as sugar alcohol calcium fertilizer, chelated iron, chelated copper, etc. Mastered below 0.2%. In the case of excessive concentration, it will not be able to produce fertilizer, but will cause dehydration and wilting of crop leaves, resulting in fertilizer damage.
It can be sprayed at any time, wrong!
Some farmers believe that foliar spray fertilizer can be applied at any time and at any time during plant growth and development. Foliar spray fertilizer is best carried out during the growth transition period of the crop. The spraying time is at least 20 days apart. Generally, the crop is sprayed 2 to 3 times per season. Different plants, different fertilizers, foliar spray fertilizer, there are certain differences in the appropriate period. Rice, corn, wheat and other cereal crops should be sprayed at the booting, flowering and filling stages.
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