EFFECT OF INTEGRATED USE OF ORGANIC AND INORGANIC NITROGEN SOURCES ON WHEAT YIELD

The integrated use of organic and inorganic fertilizers on the yield of wheat was evaluated in a field experiment at Nuclear Institute for Food and Agriculture (NIFA), Peshawar during December 2004 to May 2005. The organic sources used were farmyard manure, poultry manure and city waste. These were integrated in different proportions with mineral nitrogenous fertilizer to supply 120 kg N ha^-1N. All the organic fertilizers were applied at sowing time and mineral fertilizer (urea) was applied in three splitter sowing, tillering and booting stages in equal amount. The results showed that integrated use in different proportion increased the plant height, spike length, grain per spike and 1000-grain weight. Maximum grain yield of 3.5 tha^-1 was obtained from treatments where 25% N was applied from FYM 25% N from poultry manure or city waste and 50% from mineral source and in treatment where25% N was applied from FYM, 25% from city waste and 50% from mineral fertilizer. Application of half N from urea with 25% N from either FYM and 25% poultry manure or city waste proved beneficial and reduced 50% fertilizer cost.