1. It should not be immediately watered after urea is used. Urea is an easily soluble fertilizer that is highly mobile and easily lost. Do not apply water immediately after spreading in dry land, and do not apply before heavy rain.
2. Ammonium bicarbonate should not be applied. Ammonium bicarbonate has a high volatility and is likely to cause burning of seedlings. Therefore, it is not suitable for surface preparation. It is best to apply deep ditching and cover the earth after application.
3. Ammonium bicarbonate should not be applied in greenhouses and greenhouses. Ammonium carbonate is known as gas and fertilizer, and is applied in greenhouses and greenhouses. It is easily decomposed into ammonia gas and volatilizes to cause damage to the shed crop.
4. Do not mix ammonia nitrogen fertilizers with alkaline fertilizers. Ammonium, ammonium sulfate, ammonium nitrate, ammonium phosphate and other nitrogenous nitrogenous fertilizers encounter alkaline substances and cause nitrogen loss. Do not mix with alkaline fertilizers such as grass ash, kiln ash potash, and lime nitrogen.
5. Nitrate nitrogenous fertilizers should not be applied in paddy fields. The nitrate ions dissociated from nitric acid fertilizers such as ammonium nitrate are easily leached by the water into the deep soil layer and cause denitrification, resulting in loss of nitrogen.
6. Ammonium sulfate is not suitable for long-term application. Ammonium sulphate is a physical acidic fertilizer. Applying it on a single piece of land will increase the acidity of the soil and damage the physical structure of the soil. In long-term application in alkaline soils, the sulfate ions in the soil will react with calcium and cause the soil to react. Hardened.
7. Phosphate fertilizers should not be dispersedly applied. Phosphorus has small mobility and is easily absorbed and fixed by the soil to reduce fertilizer efficiency. When applying phosphate fertilizers, the contact area between phosphate fertilizers and soil should be reduced, and it is best to use ditch application and acupuncture and apply them to the near roots.
8. Potassium fertilizer should not be applied in the later stage of crops. Potassium can be transferred from the old leaves in the lower part of the crop to the young part in the top and reused, so the symptoms of potassium deficiency are later than those of nitrogen and phosphorus. Therefore, potassium fertilizer should be applied in advance of crop growth, or as a base fertilizer.
9. Avoid long-term use of chlorinated fertilizers and avoid applying chlorine-free crops. The long-term application of potassium chloride alone will increase the accumulation of chloride ions in the soil, resulting in the destruction of soil nutrient structure and soil acidification. The use of sugar crops such as sugar cane, sugar beet, watermelon and tobacco will reduce quality and quality.
10. Nitrogen fertilizers should not be used in large quantities in legumes. There are nitrogen-fixing rhizobia near the roots of soybeans, peanuts, mung beans, broad beans, peas, alfalfa and other crops. If a large amount of nitrogen-containing compound fertilizer is used, it will not only cause waste of fertilizer, but also inhibit the activity of rhizobia and reduce its nitrogen fixation performance. (Weng Jihua)
RP International Ltd is top Agar Agar Supplier and Manufacturer in China.
Agar-agar is a natural vegetable gelatin counterpart. White and semi-translucent, it is sold in packages as washed and dried strips or in powdered form. It can be used to make jellies, puddings, and custards. For making jelly, it is boiled in water until the solids dissolve. Sweetener, flavouring, colouring, fruit or vegetables are then added and the liquid is poured into molds to be served as desserts and vegetable aspics, or incorporated with other desserts, such as a jelly layer in a cake.
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