How to spray vegetable fertilizer

1, the concentration of spray concentration can receive good results, high concentration is not only not beneficial but harmful. Usually boric acid or borax 0.05% - 0.25%, ammonium molybdate 0.02% - 0.05%, copper sulfate 0.01% - 0.02%. If high concentration is required, it should not exceed 20% of the specified concentration. 2, the period in order to reduce the loss of trace fertilizer in the spraying process, the best choice for cloudy spraying, sunny days should be sprayed in the afternoon to evening in order to extend the moisturizing time on the stems and leaves as much as possible in order to facilitate absorb. 3, the amount of trace elements required for the amount of vegetables is very small, and the critical range of various trace elements from the lack to the excess is very narrow, a slight lack or excess may cause harm. Generally, 40-75 kilograms of fertilizer solution for a mu can make the stems and leaves of vegetables evenly wet, and avoid repeated application. 4, the number of times according to the growth and development of vegetables, usually 2-4 times. 5. The proper mixing and spraying of mixed fertilizers and fertilizers, or mixed spraying with other fertilizers or pesticides, can play a role of â€œone injection and multiple effectsâ€, but it is necessary to clarify the physical and chemical properties of fertilizers and pesticides to prevent chemical reactions and Reduce fertilizer (drug) effect.

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