New Preparation, Characterization and Application for Coated Urea using Aswan Red Clay | ||
| Journal of Soil Sciences and Agricultural Engineering | ||
| Article 4, Volume 7, Issue 12, December 2016, Pages 907-911 PDF (448.82 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jssae.2016.40541 | ||
| Authors | ||
| S. Farahat1; G. Taha2; E. Elnggar1; M. AL Molakab3 | ||
| 1Egyptian Fertilizer Development Center, El-Mansoura, Egypt. | ||
| 2Chemistry Department, Faculty of Science, Aswan University, Aswan,. | ||
| 3Egyptian Company for Chemical Industries, Kima, Aswan, Egypt. | ||
| Abstract | ||
| To enhance the effectiveness of urea fertilizers, a new coated slow-release fertilizer was developed using Aswan Red Clay (ARC) and a binder material called chitosan a biodegradable polymer was used to improve the property of urea. Characterizations of slow release of the urea granules were made using Scanning Electron Microscopy technique and energy dispersive X-ray analysis. Refractive Index method used for determine the rate of releasing. Ammonia volatilization was estimated by using the forced-draft technique. The static release experiment showed that the urea coated by Aswan Red Clay (ARCCU) gave a release of 9.78% at the first day and 95.36 at 24 day, in the same condition. The results of ammonia that volatized during 6 weeks showed that the total losses of ammonia gas for uncoated urea( UCU) and coated urea was 59.54% and 43.33%, respectively which main that the coating of urea is most costly in application. | ||
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