Gypsummin

Gypsummin is a term that describes the process of applying gypsum to soil. Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate (CaSO₄·2H₂O). When used in agriculture, it is typically in the form of a powder or granular material. The primary purpose of gypsummin is to improve soil structure, particularly in sodic soils. Sodic soils contain a high proportion of sodium ions, which can lead to poor soil aggregation, reduced water infiltration, and increased susceptibility to erosion.

When gypsum is added to sodic soil, the calcium ions in the gypsum can exchange with the sodium ions on the soil particles. This process helps to flocculate the soil, meaning that the small soil particles clump together to form larger aggregates. Improved aggregation leads to better aeration, increased water infiltration and drainage, and a more favorable environment for root growth. Gypsummin can also help to reduce the aluminum toxicity that can occur in acidic soils by precipitating aluminum ions. In addition to its soil conditioning benefits, gypsum can also provide calcium and sulfur, which are essential nutrients for plant growth. The application rates and methods for gypsummin vary depending on the soil type, its sodicity level, and the specific crop being grown.