Rock Phosphate | Dicalcium Phosphate

Rock Phosphate:
Is a calcium or lime-based phosphate rock that is usually ground to the consistency of small crumbs. This rock powder contains over 30% phosphate and a large number of trace elements. Rock phosphate does not leach out of the soil, remaining unchanged until taken up by the roots.

Plants need phosphorous for strong root growth; fruit, stem and seed development; disease resistance; and general plant vigor. Phosphorous doesn't move in the soil as easily as nitrogen does so there is no need to add it as frequently. Depending on the place, soil may have plenty of phosphorous, but it may be unavailable to plants. Phosphorous availability depends on warm soil temperatures, pH range, and the levels of other nutrients, such as calcium and potassium, in the soil. Deficiency symptoms include stunted plants with dark green foliage, reddish-purple stems or leaves, and fruits that drop early. Rock phosphate and bone meal are good sources of phosphorous.

Before begin planting this is needed to test the soil and then only start building it up using organic matter. Compost, bone meal or rock phosphate can be added to the soil but only those that are of an organic nature. Also when sowing any plants compost should be added to it about 2 to 4 weeks prior to planting. This gives the compost time to integrate and stabilize itself within the soil.

This means finding the right kind of fertilizer, try rock phosphate to achieve the correct balance.

How Rock Phosphate Is Formed?
Phosphate rock is formed in oceans in the form of calcium phosphate, called phosphorite. It is deposited in extensive layers that cover thousands of square miles. Originally, the element phosphorus is dissolved from rocks. Some of this phosphorus goes into the soil where plants absorb it; some is carried by streams to the oceans. In the oceans the phosphorus is precipitated Rock Phosphate is a natural rock mined from phosphorus-rich deposits. The rock is washed free from clay impurities and heated to remove moisture. It is then pelletized for easy application.

Dicalcium Phosphate:
Also known as calcium monohydrogen phosphate, is a dibasic calcium phosphate. It is usually found as the dihydrate, but it can be thermally converted to the anhydrous form. It is practically insoluble in water, with a solubility of 0.02 g per 100 mL at 25 °C. It contains about 23 percent calcium in its anyhydrous form, and is mainly used as a dietary supplement in prepared breakfast cereals, enriched flour, and noodle products. It is also used as a tableting agent in some pharmaceutical preparations.

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