Urea is a granular fertilizer widely used by summer residents with nitrogen deficiency. This substance in urea is 46%, it is odorless. It is easy to dissolve in water, and the higher the temperature of the liquid, the easier it is to do.
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Why feed the plants
Many summer residents are aware of the positive properties of fertilizer:
- Plants respond favorably to nitrogen fertilization. The solution does not burn the leaves, therefore foliar feeding of crops can be carried out if necessary. Already 2 days after fertilization, the nitrogen concentration in the plant protein increases.
- Urea is used to delay flowering. This reduces the likelihood that flowers will begin to crumble from trees if spring frosts hit.
- The product protects plantings from pests. It is used for preventive purposes in order to reduce the incidence of plant diseases.
- Fertilization leads to an increase in crop yields.
But the substance can have a negative effect on plantings. When crystals fall into the ground, a reaction begins, and gaseous ammonia is released. But with an overdose of fertilizer, seed germination decreases.
When the agent is introduced into the soil, a chemical reaction begins with bacteria and enzymes. Carbamide is converted to ammonium carbonate. The latter, on contact with air, turns into gaseous ammonia.
Therefore, summer residents who do not embed urea in the ground simply lose some of it. Losses increase if the site has alkaline or neutral soil. This leads to the fact that the remedy does not have the effect on the plants that the gardener expected. Therefore, the crystals must be embedded at least 5 cm deep.
How to feed plants
Gardeners should avoid the introduction of urea during the formation of buds, since fertilizer stimulates plant growth, and at the stage of flower bud development, this leads to a decrease in yield. It is best to feed when the green mass is just beginning to grow.
There are summer residents who fertilize plantings in the fall, but this tactic does not give the desired result. At this time, the decomposition of microorganisms begins, therefore, the ammonium released during a chemical reaction is destroyed.
It is necessary to add urea in the fall only if the weather is cool, and on the site there is sandy or sandy loam soil.
It should be borne in mind that perennials are not fed with carbamide in the autumn months. Better to fertilize the soil in the spring by adding urea to the holes or scattering it into the grooves. From above, the crystals must be sprinkled with earth so that they do not come into contact with seeds or seedlings.
Gardeners who do not want ammonia gas to affect the planting material fertilize the beds 2 weeks before planting. But the negative effect can be avoided if additionally potash fertilizers are applied.
But urea is not mixed with the following substances:
- superphosphate;
- dolomite flour;
- chalk;
- lime.
Those summer residents who plan to apply organic fertilizers in the spring should reduce the concentration of carbamide by 1/3.
If it is noticed that the leaves of the plants have become pale green or the ovaries have begun to crumble, foliar feeding is done.
The spray agent is prepared in the following proportion: 5 to 10 g of urea is dissolved in 1 liter of water. Planting is processed when there is no bright sun rays, it is better to carry out the procedure in the evening.
To increase the efficiency of the solution, magnesium sulfate is added to it at the rate of 3 g for every 1 liter.
You can feed the plants throughout the growing season. For the processing of vegetable crops, the following composition is made: 50 g of fertilizer are dissolved in 10 liters of water.
You can feed fruit and berry crops by changing the concentration of the solution, adding 20 g of urea to 10 liters of liquid.
Houseplants are also sprayed with carbamide, the solution for them is made according to the same recipe as for feeding vegetables.
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