“…This term means wheat with extra quality characteristics such as higher protein content or better baking quality. Investigations on this subject have demonstrated that this quality may be achieved only by split or extra applications at stages 8 and 10 of the Feekes scale ( Linser and Primost, 1953;Primost, 1952Primost, , 1956Primost, , 1958Kiirten, 1973, Terkamp, 1973Jonker and De Jong, 1966;Langer and Liew, 1973). The basic principle of slow release N-fertilizers is found in a gradual release of nutrient in a more effective way of achievement of fertilization at the later stages of growth with one single application.…”