The agricultural secondary nutrient market refers to the industry focused on essential plant nutrients beyond primary NPK, particularly calcium, magnesium and sulfur that support crop quality, soil structure, nutrient uptake and overall plant resilience. These nutrients play important roles in photosynthesis, root development, protein synthesis, and stress tolerance, making them vital to modern agriculture. The market includes products such as gypsum, dolomite, calcium nitrate, magnesium sulphate and sulfur-based fertilizers which are used in grains, fruits, vegetables and horticultural crops. Its scope includes nutrient formulation, manufacturing, distribution, precision application and integration with soil health and sustainable agriculture programs aimed at improving yield quality and long-term soil fertility.