1. Ammonium sulphate
Ammonium sulfate is a simple fertilizer containing only nitrogen. It is suitable for novices because it is relatively cheap and can maintain the effect for about a month after application. It is an easy-to-replenish fertilizer for nitrogen and protein synthesis because it is easily soluble in water, is familiar with soil, and has a high absorption rate in crops. However, due to these characteristics, the shelf life tends to shorten during high temperatures and rainy seasons. In addition, since the composition is a single fertilizer, it is necessary to use phosphate fertilizer and potassium fertilizer according to the purpose of the original fertilizer and the surface fertilizer. The factory can add phosphate fertilizer and potassium fertilizer when producing this fertilizer, and use a double roller fertilizer granulator to make granules.
2. Ammonium chloride
Ammonium chloride is a compound fertilizer containing 25% ammonia nitrogen. It is easy to dissolve and absorb in water, and a small amount of chlorine will remain after absorption, which is very important for the growth of fiber crops. Because it produces less hydrogen sulfide, it also has the function of preventing root rot, which can be expected to be effective for making delicious rice.
3. Ammonium nitrate
Ammonium nitrate contains the same amount of ammonia nitrogen and nitrate nitrogen. It is soluble in water and has an immediate effect, so it does not acidify the soil. However, due to its high moisture absorption, adhesion to wet leaves may have an adverse effect. In addition, due to its explosive nature, care must be taken when handling, e.g. do not mix it with oil.
Urea has a high nitrogen content, more than 40%, which is the same simple fertilizer as ammonium sulfate. Because it has an immediate effect, it's useful to use it when you want it to take effect immediately. It can also be used as liquid fertilizer by dissolving it in water to make it suitable for foliar spraying. However, due to the high nitrogen content, you need to pay attention to over fertilization.
5. Lime nitrogen
Calcareous nitrogen containing calcium and nitrogen can be used as an effective pesticide to prevent pests and weeds at first. When pesticide components decompose in soil, they are mainly converted into ammonia nitrogen, which can be used as fertilizer effectively. Farmers have been using it for a long time, but due to the effects of inhalation and skin adhesion, they must be very careful when spraying, such as wearing protective masks or glasses.