Ko, BS Cho, YS Rhee, HK 2024-01-21T20:13:08Z 2024-01-21T20:13:08Z 2021-09-05 1996-01 0888-5885 https://pubs.kist.re.kr/handle/201004/144849 A mathematical model describing the controlled release of urea from rosin-coated urea granules has been developed on the basis of the experimental results. The release mechanism was also elucidated from the experimental observation on the release from a single pellet. Two classes of release pattern were observed from single-pellet release experiments including (1) immediate and relatively rapid release through a few holes or many microscopic pores originally present in the coating and (2) little or no release for an extended period of time followed by a sudden, rapid release through the holes formed in the coating. It was found that individual granules could not give sustained release of urea by itself. Applying the mathematical model developed for a single pellet to real systems in which coating weight distribution is present, we obtained good agreements between model predictions and experimental results. English AMER CHEMICAL SOC SYSTEMS Controlled release of urea from rosin-coated fertilizer particles Article 10.1021/ie950162h 1 INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, v.35, no.1, pp.250 - 257 INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 35 1 250 257 scie scopus A1996TP31600032 2-s2.0-0001345414 Engineering, Chemical Engineering Article SYSTEMS SYSTEMS