Understanding and correct application of potash

First, the correct identification of potash potassium chloride is white or light brick red crystal, slightly hygroscopic. The pure potassium sulfate is a white crystal, and the commercial potassium sulfate is grayish yellow, grayish green or light brown, and has no hygroscopicity. Both kinds of potassium fertilizers did not melt when burned, and there was a popping sound, and a purple flame unique to potassium ions was observed. Both potassium fertilizers are soluble in water, and the fake potassium fertilizer is insoluble in water, mostly red brick or gravel, and should be carefully identified when purchasing.
Second, can not apply potassium fertilizer alone Potassium fertilizer can not be too little or too much, too much will produce antagonism, affecting the crop's absorption of nitrogen, phosphorus and other nutrients. The amount of potash used should be applied differently depending on the soil, crop and climate. Red soil, yellow soil and limestone soil, potassium fertilizer should be added in hot and rainy areas. For crops that require a large amount of potassium, increase the amount of potassium fertilizer.
Third, the rational application of potassium fertilizer is to broaden the source of potassium fertilizer. The use of straw returning to the field can effectively increase the potassium fertilizer, and the potassium fertilizer in the straw can be used without decomposition. The second is to use multi-component compound fertilizer, especially compound fertilizer with high potassium content, to reduce the amount of single fertilizer. Third, the mobility of potash in the soil is large, often lost due to rainfall or irrigation. It should be applied in multiple doses during the growth of the crop, and it should not be used too much. Fourth, potash should be applied in depth and should not be applied to the surface of the soil.
Huaxian County Jingzuo Station Shang Hongyan
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