The application of urea to the farmland can be done with basal fertilizers and top dressings rather than with seed fertilizers. When urea is used as base fertilizer, attention should be paid to two points. The first application of deep basal fertilizer is to cover the soil. Do not apply water immediately after application to prevent the urea from leaching into the deep layer. Applying urea as a basal fertilizer on dry land must be applied to a certain depth of soil, especially on calcareous soils with slightly alkaline soils. If urea is applied, the volatilization loss of ammonia may be more serious than ammonium bicarbonate. The second application amount should be carefully planned, because urea is a high-concentration nitrogen fertilizer, and the application amount of basal fertilizer is generally 8 to 10 kg/mu.
What precautions do urea use for top dressing?
When urea is used as top dressing, it can be applied to the roots of crops through the soil and is also suitable for foliar spraying.
When urea is used as a topdressing fertilizer during vigorous crops, pay attention to fertilization time ahead of available ammonium fertilizers such as ammonium sulfate and ammonium bicarbonate. How many days in advance depends on the season and temperature conditions in early spring (low temperature 10 degrees ) 6 to 8 days in advance, late spring and early summer (16 to 20 degrees) 3 to 4 days in advance, and 1 to 2 days in advance in summer.
Urea is used as a top-dressing fertilizer and is suitable for foliar spraying of various crops. The appropriate concentration is generally between 0.1% and 0.5%, and varies depending on the crop type and growth period. When urea is used for foliar spraying, it must be noted that the content of biuret as a secondary component must be less than 0.5%. In addition, the use of urea and potassium dihydrogen phosphate mixed solution for extra-root fertilizer, sprayed on the leaves of wheat or corn and other crops, is conducive to their grouting to increase 1000-grain weight. The urea contained in the foliar fertilizer is conducive to the absorption of phosphorus and potassium.
Urea is not suitable for seed fertilizers.
Expert Tips:
When urea is used as a basal fertilizer, it is necessary to control the amount of the urea, and it is necessary to pay attention to bury it in the soil.
When urea is used as a top dressing, appropriate fertilization should be applied as appropriate. Urea is not suitable for seed fertilizers.
What precautions do urea use for top dressing?
When urea is used as top dressing, it can be applied to the roots of crops through the soil and is also suitable for foliar spraying.
When urea is used as a topdressing fertilizer during vigorous crops, pay attention to fertilization time ahead of available ammonium fertilizers such as ammonium sulfate and ammonium bicarbonate. How many days in advance depends on the season and temperature conditions in early spring (low temperature 10 degrees ) 6 to 8 days in advance, late spring and early summer (16 to 20 degrees) 3 to 4 days in advance, and 1 to 2 days in advance in summer.
Urea is used as a top-dressing fertilizer and is suitable for foliar spraying of various crops. The appropriate concentration is generally between 0.1% and 0.5%, and varies depending on the crop type and growth period. When urea is used for foliar spraying, it must be noted that the content of biuret as a secondary component must be less than 0.5%. In addition, the use of urea and potassium dihydrogen phosphate mixed solution for extra-root fertilizer, sprayed on the leaves of wheat or corn and other crops, is conducive to their grouting to increase 1000-grain weight. The urea contained in the foliar fertilizer is conducive to the absorption of phosphorus and potassium.
Urea is not suitable for seed fertilizers.
Expert Tips:
When urea is used as a basal fertilizer, it is necessary to control the amount of the urea, and it is necessary to pay attention to bury it in the soil.
When urea is used as a top dressing, appropriate fertilization should be applied as appropriate. Urea is not suitable for seed fertilizers.