Potassium dihydrogen phosphate is effective, so why is it rarely used as a base fertilizer? What is the reason?

Potassium dihydrogen phosphate can be used as a base fertilizer, but it is not recommended! If you are growing a few flowers and plants in home gardening, choosing potassium dihydrogen phosphate as a base fertilizer is understandable, but if farmers were choosing a base fertilizer, I believe no farmer would choose potassium dihydrogen phosphate as a base fertilizer, because potassium dihydrogen phosphate is too expensive.

Farmers calculate benefits based on input and output. If a large input cannot bring efficient output, I believe no one would make such a choice. Friends with agricultural production experience should be fairly clear that potassium dihydrogen phosphate is much more expensive than using phosphate fertilizer and potassium fertilizer separately, and potassium dihydrogen phosphate only contains two elements, phosphorus and potassium. For crops, there are many options for supplementing phosphorus and potassium: for example, superphosphate combined with potassium chloride, or combined with potassium sulfate, are both very good choices.

As for fertilizer efficiency, although using potassium dihydrogen phosphate alone saves quite a bit of effort, current agricultural production is basically all mechanized fertilization. In fact, using chemical fertilizers separately does not add much hardship. Here, from a scientific perspective, it is suggested that you can consider using phosphorus and potassium fertilizers separately. Although potassium dihydrogen phosphate can be used as a base fertilizer, it really is not worth it.

In addition, everyone should be reminded that some lawbreakers pass off potassium sulfate, or even the cheapest "magnesium sulfate," as counterfeit potassium dihydrogen phosphate, so farmers often cannot tell the real from the fake when buying. Potassium sulfate and sodium sulfate look whitish, while potassium dihydrogen phosphate crystals are transparent, so they can be simply identified by appearance.

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