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In the eyes of many farmers, urea is a universal fertilizer. The crops are not growing well, throw some urea away; The leaves of the crops have turned yellow and some urea has been thrown on them; Even if the crops are fruiting and the fruiting effect is not very ideal, quickly add some urea; Even urea is used as foliar fertilizer.

What is the function of urea? If the function and purpose of urea are not clear, it may lead to twice the effort and even fail to achieve the desired effect. In severe cases, it can affect the growth of crops, resulting in crop reduction or even crop failure!
Everyone knows that urea is a nitrogen fertilizer with a relatively high nitrogen content. The most important element required for crop growth is nitrogen fertilizer. So everyone believes that if the crop growth is not very ideal, it will definitely lack nitrogen fertilizer. Actually, this is not the case. If you know the role and effectiveness of nitrogen fertilizer, you will make reasonable use of urea.
1： Properties of urea
Urea is a very important fertilizer and one of the most common nitrogen fertilizers used by farmers on crops. The nitrogen content in urea is around 46%, which is the highest among all solid fertilizers. Urea is a neutral fertilizer that is suitable for various soils and also for any plant. It is easy to preserve, convenient for transportation, and has little damage to the soil. It is currently the most commonly used nitrogen fertilizer in agricultural production.
2： The Function and Use of Urea
(1) Urea can promote crop growth. The nitrogen element in urea is one of the essential nutrients for crop growth and development. If the crop lacks nitrogen fertilizer, it will appear as the plant color is lighter and the old leaves at the base turn yellow; The stems of crops are thin and weak; Fewer branches or tillers lead to premature aging of crops; If there is a lack of nitrogen fertilizer in fruit trees, it can lead to small, few, thick, and hard fruit skins.
(2) Urea can promote the development of new shoots during the growth period of crops. During the growth stage of crops, applying urea can promote the development of new shoots in crops, especially fruit trees. The use of urea in crops can promote the nitrogen content of crop leaves, accelerate the growth of new shoots, and inhibit flower buds.
(3) Urea, as a foliar fertilizer, can supplement crops with fertilizer while killing pests. Dissolving urea and laundry detergent in clean water and spraying them on the leaves of crops can quickly replenish fertilizers and effectively kill some pests. The killing performance of soft pests such as cabbage beetles, aphids, and red spiders reaches over 90%. As a neutral fertilizer, urea is easily absorbed by leaves and has very little damage to crops.