It is well known that humic acid can act as a synergistic fertilizer. In this case, can humic acid and urea be mixed? The answer is yes. In the next article, we will explain to you the effects of mixing humic acid and urea.
Humic acid can reduce the loss of ammonia volatilization in urea and improve urea utilization
The pH of humic acid and fulvic acid, the main components of humic acid, are 1.88-2.28 and 1.13-1.19 respectively. After being applied to the soil, it can cause a temporary decrease in soil pH, thereby easing or even inhibiting the hydrolysis of urea in the fertilized area, thereby reducing the level of urea. Ammonia volatilization loss.
The experimental results showed that after applying humic acid and urea to the soil, the ammonia volatilization was significantly reduced by 13.51%-21.04% compared with ordinary urea treatment;
The researchers also confirmed that the ammonia volatilization amount of humic acid and urea mixed application in the early stage of culture (0-10 days) was significantly lower than that of urea alone (P<0.05), but was higher than that of urea alone later. Therefore, the mixed application of humic acid and urea can inhibit the volatilization of ammonia in the early stage and slowly release the ammonia stored in the soil in the later stage, thereby improving the utilization rate of urea.
After this explanation, I believe you have understood that the combination of humic acid and urea can improve the effectiveness of urea. If you usually use a lot of urea, you may wish to purchase some humic acid, which will definitely bring good economic benefits to your crops.