Nitrogen fertilizers are essential for the full growth and development of crops. Nitrogen is part of the structure of plant protein and is needed for building cells. One of the most popular forms of nitrogen-containing dressings is urea, which is also called urea, a substance synthesized from carbon dioxide and ammonia.
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How to apply fertilizer correctly
The nitrogen content in pure urea is 46.2%. The drug is produced in the form of granules, colored in yellow, white or gray, as well as in tablets. The latter have a special shell, due to which the fertilizer dissolves more slowly, and thus the nitrification of the soil is reduced.
Due to its high hygroscopicity (the substance instantly absorbs moisture), it is important to provide special conditions for storing urea - in an airtight container and in a dry room. Urea has a limited shelf life, but even after its expiration it can be used, while the nitrogen concentration will decrease.
Soil microorganisms react with urea, and as a result, the substance is converted into ammonium carbonate and instantly decomposes in the air. That is why digging and sprinkling with earth allows you to eliminate the evaporation of gaseous ammonia.
Urea is introduced into the soil at the rate of 5-12 g per 1 square meter. This formula is used to prepare the soil for planting vegetables. Young plants and seedlings of vegetable crops are fed with a more concentrated solution - 20-10 g of granules per 10-liter bucket of water.
Trees are fertilized as follows: 120 g of urea is dug up along the entire perimeter of the crown. The apple tree requires more volume, so 200 g of the substance will be needed. You should know that urea slightly oxidizes the soil, therefore its use is combined with limestone, and 800 g of limestone is laid per 1 kg of fertilizer.
Leaf feeding has proven itself well. The procedure should be performed if there are signs of nitrogen starvation such as stunted growth, foliage and ovary fall. Ammonium nitrate is not suitable in this regard, since it burns the leaves a lot. The working solution should consist of 50-60 g of the substance per 10 liters of water.
Protective properties of urea
With the beginning of spring, the activity of harmful insects becomes more active. You can influence them with imported drugs, the cost of which is high. However, the same result will provide a safe, useful and effective urea in pest control. The solution will require 500-700 g of the drug per bucket of water for subsequent spraying.
If you treat trees and shrubs in the same way in the first period of leaf fall in the fall, you can avoid diseases, such as purple spot, scab and others. The urea solution is applied not only to the crops themselves, but also to the fallen leaves under them. If this is not done, the infection will overwinter and in the spring will again make itself felt.
Do you feed the plants with urea?
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You can also read about feeding tomatoes in the following article:How to feed tomatoes so that they taste sweet