Comparative Effect of Various Organic Extracts Coated Urea Fertilizer on the Release Pattern of Ammonium and Nitrate in the Soil at Different Time Intervals

The losses of nitrogen (N) fertilizer applied to the soil microenvironment reduce its efficiency. Different strategies like use polymer coating and chemical nitrification inhibitors had been employed N losses. But these are very expensive. Thus, a study was conducted investigate effects different concentrations Parthenium extract, neem oil, acidulated cow dung compost extract on dynamics in soil. Three (5, 10, 15%) oil (1, 2, 3%) were coated urea granules using as binding agent. pH (2, 4, 6 pH) based extracts also same pattern. These fertilizers uncoated jars filled with (100 g per jar) at rate 1 jar. One treatment kept control (without fertilizer). Treatments along three replications arranged according completely randomized design. Results depicted that all materials caused release consistently from compared treatment. In addition, percent nitrified reduced significantly treatments comparison treatments. However, level concentration effect not obvious lower performed almost equal higher inhibiting process.