The national fertilizer development center developed the sulfur coated technology in 1960s and 1970s. Sulfur coated urea is a type of controlled release fertilizers that are generally classified under the coated products. The sulfur coated urea are manufactured by coating molten sulfur on hot urea and then sealing it with polyethylene oil or wax. The sulfur coated urea may contain 30 – 40 % of nitrogen and 15 – 20 % of sulfur. The necessity of using proper amount of nutrients in cultivation ... Read more