Can you still use soil with more urea?

1. Balanced fertilization.

Urea is a pure nitrogen fertilizer, does not contain phosphorus and potassium elements needed for plant growth, when urea is applied too much, it is necessary to carry out soil testing and testing, according to the lack of soil elements, balance the content of nitrogen, phosphorus and potassium elements, and rationalize the combination of nitrogen, phosphorus and potassium elements to improve the utilization rate of urea.

2. Spray vinegar.

In the early stage of plant growth, excessive urea application will lead to excessive growth, and lodging and poor growth are prone to occur in the later stage, and excessive urea can be used to mix edible vinegar with water to make 200 times the liquid, spray to the foliage, insist on spraying 2 to 3 times, and in severe cases, you need to irrigate the roots with vinegar.

3. Flush and dilute.

Excessive urea application will lead to excess soil nitrogen, crop growth, thicker stems and vines, larger and thinner leaves, easy to break, increase the consumption of photosynthetic products, reduce dry matter accumulation, and lead to reduced yield.

4. Correct fertilization.

Urea is easily soluble in water, strong diffusion, easy to be absorbed by the leaves, with urea mixed with water, sprayed to the leaves, less damage to the leaves, suitable as root top dressing, combined with pest control drugs for foliar spraying, as root top dressing is suitable to be applied after 4 pm, which is conducive to absorption.

It is easily lost with water before it is converted into ammonium carbonate and is absorbed and utilized by crops. Therefore, if urea is applied excessively, it can be immediately watered with water and a large amount.

After applying urea, it is usually difficult to exert fertilizer effect without covering the soil, because urea needs a certain amount of time to be converted into ammonium nitrogen, and then it can be absorbed and utilized by crops. Therefore, it is recommended to make a furrow at a distance of 5-8cm from the root system of the crop, followed by deep application of urea, and then cover the soil to ensure that the urea can exert its fertilizer effect normally.

1. Is urea effective if it does not cover soil?

1. It is generally difficult to exert fertilizer effect without covering the soil after the application of urea, because urea needs to be converted into ammonium nitrogen before it can be absorbed and utilized by crops, but the time of urea conversion into ammonium nitrogen is not fixed, and factors such as soil temperature and soil pH value will affect the transformation time. If the urea is not covered after application, the rain will wash the urea away, and the sun will evaporate the urea, resulting in the loss of most of the fertilizer, and only a small part of the fertilizer will be absorbed, which will affect the fertilizer efficiency.

2. When applying urea, it is recommended to apply deeply, and then cover the soil to ensure that urea can fully exert the fertilizer effect, generally can be applied in a ditch at 5-8cm away from the root system of the crop, or it can be applied in a hole, the depth is generally 5-10cm, to ensure that urea can be concentrated in the root layer at the same time, and will not evaporate, which is helpful to improve the utilization rate of fertilizer.

3. And urea should not be applied before the rain, and watering and irrigation can not be carried out immediately after fertilization, because urea will be lost with water, which will affect the fertilizer effect, so generally after the application of urea, you can wait for 3 days, and then water, if it is rainy, you can generally choose to apply it after the rain.

Second, how to use urea correctly

1. How to use.

1) Determine the concentration of urea according to the type of crop, and the concentration should not be too high to avoid the leaves being burned.

2) For cereal crops, the appropriate spraying concentration is generally as follows, that is, prepare urea granules and 100kg of water, and prepare them into a urea solution with a concentration of concentration, and then they can be sprayed.

3) For fruit trees such as apples, pears, and grapes, you need to prepare 100kg of water and urea, and then prepare it into a urea solution with a concentration before spraying.

4) But not all crops are suitable for urea, such as celery, although celery needs a lot of nitrogen fertilizer during the growing season, urea can not be applied, because urea will make celery's fiber increase and thicken, and it has a bitter taste when eaten.

2. Precautions for use.

1) It is not advisable to mix urea with alkaline fertilizer or apply it at the same time, because urea will be converted into ammonium nitrogen, and ammonium nitrogen is easy to become ammonia and volatilize after encountering alkali, and cannot be well absorbed and utilized by crops.

2) The application time should not be too late, if the application time is too late, it is easy to cause the crop to be greedy for green and late maturity.

It can be changed to play a role, but urea is volatile, and it must not be as good as the effect of filling fertilizer into the soil. The time of top dressing is best to grasp the critical period of nitrogen demand of the plant.

Yes. Because urea is easily volatile and needs to be buried in the soil, it cannot be fertilized directly.

Yes, it doesn't work any fertilization. In life, you should not fertilize in this way, there is no effect.

Watering heavily or cultivating.

Excessive use of urea can burn out plant roots, causing stunted growth and death of crops.

Solution: 1) Carry out flood irrigation, dilute the concentration of fertilizer with water, disperse the infiltration fertilizer, and reduce the harm.

2) For the strip application of urea, it can be cultivated in deep on the strip ditch to release the ammonia converted by urea. Reduces the damage of ammonia to the root system in the soil.

Note: When cultivated at high temperatures, ammonia will damage the leaves.

Hello: If you put too much urea, don't plant it first, first flood it with water, and then plough it, and you can plant it 7 days after ploughing.

Too much can lead to large concentrations in the soil, water loss, and plant death.

Urea is a widely used chemical fertilizer whose main components are nitrogen-rich compounds. However, many people do not understand how long urea lasts in the soil. So, how long does urea fail in the soil? This article will answer this question for you.

First of all, we need to be clear that the failure time of urea is closely related to the environmental factors of the soil. For example, the pH, humidity, temperature, etc. of the soil will affect the rate at which urea dissolves and the release of nitrogen. In general, urea dissolves completely within 2 to 4 days and releases most of its nitrogen within 2 weeks.

Secondly, we need to note that the effective time of urea is also related to the growth cycle of the crop. For short-cycle crops (such as small soopi wheat, corn, etc.), the effective time of urea is generally about one month; For long-cycle crops (e.g. soybeans, cotton, etc.), urea may be effective for more than two months. In some extreme cases, such as low temperatures and high soil moisture, the effective time of urea may be shortened.

Finally, we need to remind you that excessive use of urea can lead to soil contamination and environmental degradation. Therefore, in the process of fertilization, it is necessary to follow scientific methods and quantitative standards to avoid unnecessary harm to the environment.

In summary, the failure time of urea in the soil is affected by a variety of environmental factors, generally between 2 weeks and 2 months. We should always pay attention to environmental protection and follow scientific methods when using chemical fertilizers to ensure the sustainable health of the environment.