Effect of integrated use of nitrogen on yield and N uptake of maize crop

The present field studies investigated the effect of the integrated use of mineral n and organic n sources (farm yard manure,poultry manure and filter cake) on maize crop. field experiment was carried out on silty clay loam soil at nifa tarnab peshawar pakistan during 2005-06. there were 17 treatments with four replications using maize variety azam as a test material in rcb design. statistical analysis of the data revealed that integrated application of organic n sources (farmyard manure,poultry manure,filter cake) and mineral n source (urea) resulted an upward trend in the yield of maize crop. maximum biomass,(9554 kgha-1) and stover yield (8136 kgha-1) of maize were obtained from those treatments where 100% (fym) was used. maximum grain yield (1838 kgha-1) was recorded from treatment where 25% farmyard manure (fym) and 75% mineral nitrogen source (urea) were used. agronomic efficiency and nitrogen use efficiency was also found higher in the treatments where 25% n from farmyard manure (fym) and 75% n from mineral n source (urea) was applied. it was concluded that combination of 75% mineral n source and 25% organic n sources (urea) are the best combination for sustainable yield.