Syed Manzar-ul-Alam, Syed Azam Shah, Sikander Ali, and Mohammad Mohsin Iqbal

pp. 449 - 455

Abstract

Due to continuous use of chemical fertilizers under intensive cultivation system, soils are being
degraded physically as well as nutritionally. Integrated use of organic waste and chemical fertilizer is being
emphasized for restoration of soil health and sustained crop productivity. A pot and a field experiment were
conducted to study the effect of combined use of organic wastes and chemical fertilizer on wheat growth and
yield. The results of both experiments showed that integrated use of organic industrial waste (Filter-cake,
FC/Poultry waste, PW) and chemical fertilizers in 2:1 P ratio proved to be a better combination than
integration of inorganic sources in the same ratio for increasing the P-fertilizer efficiency and enhancing
grain yield of wheat. Combined application of PW and DCP (di-calcium phosphate) proved better than other
combinations with relatively higher value: cost ratio as compared to DAP (di-ammonium phosphate) alone.
Thus, substantial reduction in P fertilizer input may reduce the cost of production.