Nitrogen release pattern from fertilizer pellet pack placed in soil

Abstract

Fertilizer Pellet Pack (FPP) is a design having fertilizer pellet encapsulated in a polymer coated paper pouch. In order to supply N to sugarcane, the slow release characteristics of different forms of FPP, having single and double layer of poly coat paper, were studied up to 10 months at fortnightly intervals of sampling. The treatments consisted 3 methods of composing FPP. In each FPP, fertilizer NPK nutrients were placed as urea, muriate of potash and P sources as DAP or SSP or both DAP + SSP. The FPP having 3450 mg of N was placed and incubated in 200 g of moist field soil. The results showed that the slow release of ammonium N resulted in FPP having NPK with P as either SSP or SSP + DAP in double layer. The release rate of ammonium N was slower (