Smoked-type fertilizers mainly use ammonia, ammonium bicarbonate, and other fertilizers. These fertilizers are applied at high temperatures and are prone to produce large amounts of ammonia, causing damage to crops, lighter yellowing of the lower tip, and affecting growth and development. In severe cases, the whole plant will die of red and yellow. Prevention: This type of fertilizer should be avoided at high temperatures.
When the seed fertilizer is used for fertilizer application, the dosage is too large, or the fertilizer is seeded with calcium superphosphate, ammonium bicarbonate, urea, lime nitrogen, etc., and seed burning often occurs, resulting in lack of seedlings. Prevention: Fertilizer dosage should not be too large, do not use superphosphate, ammonium bicarbonate, urea, lime nitrogen and other seed dressing.
Toxic fertilizer Some chemical fertilizers, such as lime nitrogen, are applied to the soil and undergo a series of transformations to be absorbed by the plant. However, some toxic substances are poisoned in the conversion process, causing damage or death. Prevention: In the application of fertilizers, the application amount must be strictly controlled and the fertilizer should be used safely and rationally.
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