TY - JOUR ID - TI - Slow release fertilizer(ammonium nitrate) based on natural and synthetic rubber AU - Mohammed A. Mutar and Nabeel A.A. AlRada PY - 2013 VL - 1 IS - 1 SP - 127 EP - 139 JO - Muthanna Journal of Pure Science (MJPS) مجلة المثنى للعلوم الصرفة SN - 22263284 25725181 AB - Fertilizers losses due to leaching, volatilization and theactivated risk of Fertilizers leaching after addition to the soilmay be reduced through the use of slow release fertilizers. Thesemembranes often consist of permeable polymers, waxes orsulfur. The aim of this project is to find a suitable material andmethod for coating of nitrogen fertilizer to achieve controlledrelease and also to evaluate the coating and the coating methodin laboratory scale. The reason for choosing natural andsynthetic rubbers that has been used as coating materials forthe controlled release fertilizers to decrease the release rate. Toevaluate the coating material a conductivity meter was used tomeasure the conductivity as a function of time. The conductivitywas changed as the ammonium and nitrate ions were releasedthrough the membrane to the surrounding water. The resultsshows that it was possible to coat fertilizer particles with styrenebutadiene (SBR), natural rubber(NR), butadiene rubber (BRcis)and butyl rubber. The release rate of ammonium nitrate fromSBR and Butyl rubbers are higher than NR and BRcis rubbers.

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