Abstract
Bagasse Fly Ash (BFA) a solid waste from sugar cane industry was used as a matrix for preparing Slow Release Fertilizer (SRF). The matrix is a mixture of the BFA with a specific binder i.e. starch and molasses. Then the matrix was mixed with diluted commercial urea fertilizer in an elevated temperature for increasing the solubility of the urea. The effect of the binder and urea-matrix composition are obvious in changing the pattern of release of the nitrogen content from the matrix during 30 days leaching test. The SRF pellets using molasses tend to have faster release rate than the pellet with starch binder. Then, for the pellets with equal amount of matrix and urea (50:50) the release profiles has two sharp increase during the first 5 days and after 15 days, while for the higher urea composition (70:30), the profile only has one sharp release in the beginning followed by a very slow steady release until the end of the test.
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