Manganese Sulphate for High-Alkaline Soils: Boosting the Photosynthesis Index

Manganese (Mn) is an essential trace element that operates at the very biochemical heart of plant photosynthesis, enzyme synthesis, and nitrogen metabolism.

1. Biochemical Function: The Oxygen-Evolving Complex

Manganese is the central catalytic cofactor in the Oxygen-Evolving Complex (OEC) of Photosystem II. It drives the photolysis reaction—splitting water molecules into oxygen, protons, and electrons using solar energy. Without adequate manganese, chlorophyll efficiency collapses, carbohydrates cannot be synthesized, and crops suffer severe interveinal chlorosis on middle canopy leaves.

2. Soil pH & Manganese Chemistry

Manganese availability is acutely governed by soil oxidation-reduction status and pH. In alkaline soils (pH > 7.2), soil microbes rapidly oxidize available divalent manganese (Mn2+) into insoluble tetravalent oxides (MnO2) that crop roots cannot absorb.

3. Auron Manganese Sulphate Monohydrate 30.5%

Our Manganese Sulphate Monohydrate 30.5% delivers guaranteed 30.5% min elemental Manganese (Mn) and 17.5% min Sulphur (S) in free-flowing pinkish-white powder/granular form.

• •Basal Soil Application: 5 to 8 kg per acre during soil preparation for Sugarcane, Wheat, Soybeans, Potatoes, and Citrus.

• •Foliar Correction: 3 grams per liter (0.3% solution) sprayed at 30 and 45 days after sowing.