Studies on slow-release fertilizer. 3.- microscopic studies for evaluation of polymer coating via physical-chemical properties of modified urea material
1997
El-Aila, H.I. | Abou-Seeda, M. (National Research Centre, Cairo (Egypt). Soil and Water Use Dept.)
Polyethelene glycol, polyvinyl acetate polyacrylamide and bentonite were used for coating urea fertilizer to increase its efficiency. Scanning electron microscopy (SEM) was carried out to illustrate and understand the variations effect of the studied coating materials on dissolution rate (DR), moisture content (M.C.) and crushing strength (C.S.) coating film and less dispersed giving higher dissolution rate. The distribution of release timing among the fertilizer granules may allow a long-lasting. The result indicated that nutrient supply to the plant, as long as enough granules within the root zone to allow a uniform supply pattern
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