First, the foliar dressing can only be a kind of supplement, and it must be based on the application of base fertilizer and timely fertilizer in order to achieve the desired results.

Second, the concentration should be too low concentration, can not reach the top dressing purposes; too high, prone to damage or toxins.

Third, the application period and time should be reasonable throughout the growth period can be applied, but should avoid the flowering period. Generally, it is carried out in sunny, morning, late or cloudy days. It rains within 3 hours after spraying, and should be sprayed after sunny days, but the concentration should be reduced.

Fourth, the rational use of fertilizers such as the rational use of more than two kinds of fertilizers, the effect of increasing production is extremely significant. However, it cannot be used arbitrarily. For example, potassium dihydrogen phosphate cannot be mixed with rare earths; filtered human urine cannot be mixed with ash extract of plant ash. In addition, as far as possible, the foliar dressing is not mixed with alkaline pesticides.

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