Which one is better, potassium sulfate or potassium nitrate?

Let me introduce to you which potassium sulfate or potassium nitrate is more effective:
1. From the price point of view, potassium nitrate is expensive and potassium sulfate is cheap, but you get what you pay for, and good things are not too cheap!
2. From the perspective of fertilization effect and environmental protection, potassium nitrate is better. Potassium nitrate is a compound fertilizer containing two elements: nitrogen and potassium. It is non-volatile and can be applied directly to the soil surface without covering it with soil. It is also nitrate nitrogen. , it can quickly provide nutrients under any conditions in spring, summer, autumn and winter. It is easy for plants to absorb and has high fertilizer efficiency. It is especially suitable for chlorine-resistant crops, such as tobacco, tomatoes, citrus, glucose, etc. Nitrogen promotes seedlings, and potassium resists plant lodging.
Potassium sulfate is a single fertilizer containing only potassium and does not contain phosphorus or nitrogen. It must be applied in conjunction with other fertilizers. Moreover, the sulfate formed by the reaction between sulfate roots and ions in the soil is too insoluble, which causes the soil to harden and destroy the soil structure. Potassium nitrate has no residue and is better than potassium sulfate in protecting the environment.