Phosphorus was first added as a fertilizer in the form of single super phosphate in the mid-nineteenth century, following research at Rothamsted Experimental Station in England.
Organic manure can prevent ions of other elements from locking phosphorus into insoluble forms.
It was previously thought that only those rocks which have citric acid soluble phosphate and those of sedimentary origin could be used.
Addition of natural minerals or synthetic oxides in water-insoluble forms that contain micronutrients such as copper, zinc, and cobalt may improve the efficiency of phosphate rich organic manure.
[6] The Ministry of Agriculture and Cooperation of the Government of India has approved phosphate rich organic manure and included it under the Fertilizer Control Order.