Solution

Agriculture

Fertilizers KOH is used to produce fertilizers which supply the element potassium (one of the major plant foods) to crops, especially to those crops which cannot tolerate chloride ions.

Herbicides It is used in herbicides and fungicides.
It helps regulate the pH of acidic soils.
A mixture of phosphorous acid (non-pesticide compound) and KOH is regularly sprayed on plants for pests and disease prevention.
The crops that are collected will not have pesticide remains.