Fertilizers are volatile, lost or difficult to reach the roots of crops, and are not conducive to crop absorption, resulting in low fertilizer utilization. Fertilizers should be applied 16 to 26 cm below the seed or plant side.
2. Apply dichloroform fertilizer
The compound fertilizer produced by dichloroform ammonium with ammonium chloride and potassium chloride is called dichloroform fertilizer. About 30% chlorine, easily burned seedlings, timely watering. Saline-alkali land and chlorine-sensitive crops cannot be treated with chlorine-containing fertilizers. Excessive application of potassium chloride to leaf (stem) vegetables not only causes the vegetables not to be tender and has many fibers, but also makes the vegetables taste bitter, has poor taste, and has low benefits. Urine-based compound fertilizers have high nitrogen content, biuret nitrogen is also slightly higher, and easy to burn seedlings. Pay attention to the depth of watering and fertilization.
3. Improper application of chemical fertilizers to crops
May cause fertilizer damage, burned seedlings, wilting of plants, etc. Excessive application of nitrogen fertilizer, a large amount of ammonia and ammonium ions in the soil, on the one hand ammonia volatilization, droplets of air in the form of alkaline beads, burn crops, Dripping spots appear on the leaves; on the other hand, ammonium ions are prone to nitrification on dry soil and converted into nitrite ammonium under the action of nitrosobacter bacteria. The gasification produces nitrogen dioxide gas, which can poison crops and cause irregularity in crop leaves. Water-stained plates gradually turn white between veins.
4. Excessive use of certain nutrients
This will not only poison the crops, it will also hinder the absorption of other nutrients by the crops and cause illness.
5. Fresh human waste directly applied to vegetables
Fresh human waste contains a lot of bacteria, toxins, and parasite eggs. If it is not directly cooked, it will contaminate vegetables and cause diseases. It can only be applied after high-temperature heaping fermentation or harmless treatment.
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