Controlled Release Fertilizer (CRF) is a granulated fertilizer that releases nutrients gradually into the soil, marilyn with a controlled release period. The gradualness of the release depends on low solubility of chemical compounds in the soil moisture. Since conventional fertilizers are soluble in water, the nutrients disperse quickly, as the fertilizer dissolves. But controlled-release fertilizers are not water-soluble, the nutrients disperse into the soil slowly, giving time for the crops to absorb the nutrients. Hence, improving the yield.