摘要：The paper presents controlled release of Zinc sulphate fertilizer made with fly ash as inert matrix. Pellets were made from the mixture and the release rate of zinc sulphate with time was studied. The parameters covered are fractional zinc sulphate, fractional cement and fractional sand and diameter of the inert particle size, diameter of the pellet. The parameters also measured with Naphthalene coating pellets and compared. The study is useful to identify the controlled release of zinc sulphate fertilizer and also to predict the release rate at any instant of time.
