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Ammonium bicarbonate: weakly alkaline, can be used as base fertilizer and top dressing, can not be used as seed fertilizer, should be applied deeply when applied, and can not be mixed with ammonium nitrate or superphosphate.
Urea: Neutral is suitable for all kinds of soils and crops. It should be used as top dressing and base fertilizer, and can not be used as seed fertilizer.
Ammonium nitrate: weakly acidic, can be used as top dressing, can not be used as base fertilizer, seed fertilizer. Early spring crops should not be applied, and should not be mixed with organic fertilizers. The application to paddy fields is not effective.
Superphosphate: weakly acidic, can be used as base fertilizer, seed fertilizer and top dressing. It is suitable for neutral or acidic soils but should be applied with lime or organic fertilizers.
Potassium sulphate: physiological acid fertilizer, suitable for base fertilizer and top dressing. Applicable to all kinds of crops, avoid chlorine crops.
Potassium chloride: physiological acid fertilizer, should be used as base fertilizer, applied on acid soil, should be applied with organic fertilizer and lime, salt and alkali should not be applied potassium chloride, avoid chlorine crops, should not be mixed.
Potassium dihydrogen phosphate: used for soaking and root dressing.
Nitrogen, phosphorus and potassium compound fertilizer: should be used as base fertilizer and early topdressing.
Characteristics and application of commonly used fertilizers
At present, the survey in agricultural production found that individual farmers use fertilizer in farmland, do not understand the blind application of chemical fertilizers, and have a negative effect (fertilizer) after application, which causes waste on fertilizer and economics. loss. In order to scientifically use chemical fertilizers and give full play to the quick-acting effect of chemical clothing, the characteristics and application of several commonly used chemical fertilizers are introduced.
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