Controlled release of urea from rosin-coated fertilizer particles
- Authors
- Ko, BS; Cho, YS; Rhee, HK
- Issue Date
- 1996-01
- Publisher
- AMER CHEMICAL SOC
- Citation
- INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, v.35, no.1, pp.250 - 257
- Abstract
- 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.
- Keywords
- SYSTEMS; SYSTEMS; SYSTEMS
- ISSN
- 0888-5885
- URI
- https://pubs.kist.re.kr/handle/201004/144849
- DOI
- 10.1021/ie950162h
- Appears in Collections:
- KIST Article > Others
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