When there is a deficiency in crops. Usually in the field production process, some crops often show a deficiency in certain elements. At this time, foliar fertilization is better than soil fertilization and the utilization rate is high.
Crop root absorption capacity at the time of aging. In the later stage of crop growth, the crop roots often show a decline in vigor and the ability to attract fertilizers is reduced. At this point, if you want to apply fertilizer to the crop, you should use foliar spray fertilizer.
When crop growth is adversely affected by the environment. When the soil environment is unfavorable for crop growth, such as too much water or too little drought, when the soil is too acidic or over-alkali, foliar spray fertilizer is used to quickly supplement the nutrients and meet the needs of growth and development.
When soil fertilization is difficult to operate. The first is the application of trace elements, often using foliar spray fertilizer. The second is that for the mulch-covered crops, it is difficult to use the top-dressing soil under the condition that the amount of base fertilizer is insufficient. In this case, foliar spray fertilizer should be selected to supplement the nutrient requirements.
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