Agricultural gypsum

GREEN GYPSUM

Gypsum, or agricultural gypsum, has the chemical formula CaSO4·2H2O. It contains CaO 32.6%, SO3 46.5%, and H2O 26.9%. The calcium and sulfur in gypsum are present as sulfates, which plants can use immediately (sulfate fertilizers on the market are often made by blending gypsum).

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• To improve soil condition: 500–1000 kg per acre

• Fruit trees: 4 kg per ton (split application: 2 kg applied around the tree base after harvest, and 2 kg during flower development)

• Field crops, shallots, garlic, cassava, sugarcane: 500 kg per acre

• Rice paddies: 120 kg per acre, split into two applications at 20 and 60 days after transplanting

• Leafy vegetables: broadcast over beds as appropriate

• Rubber and oil palm: 4 kg per tree, applied twice per year

1. Corrects saline soils

2. Reduces soil compaction or lumping

3. Reduces soil erosion and washout

4. Reduces loss of soil nutrients such as phosphorus and nitrogen

5. Aids chlorophyll synthesis in plant leaves

6. Stimulates root and shoot growth

7. Promotes root nodule formation in leguminous plants that fix nitrogen

8. Supplies important secondary nutrients (calcium and sulfur)

• Aids plant cell division and strengthens plants

• Supports growth of roots, stems, branches, leaves and shoots

• Reduces premature flower and fruit drop

• Prevents internal browning/softening (core problems) of fruit

• Reduces fruit cracking

• Component of plant amino acids, aiding protein synthesis

• Helps produce chlorophyll for photosynthesis

• Prevents yellowing from sulfur deficiency

• Improves harvest quality—both flesh and aroma

• Enhances oil synthesis quality in crops such as chili, shallot, garlic, and sesame