Abstract
Field trial to evaluate the response of different maize varieties to organic and inorganic nitrogen was conducted at Agricultural Rescobch Farm, Khyber Pakhtoonkhawah, Agricultural University, Peshawar during summer 2010. The experiment consisted of eleven nitrogen treatments (Control, Nitrogen alone, FYM alone, Poultry manure (PM) alone, Green manure (GM) alone, 50% N (Urea) + 50% FYM, 50% N (Urea) + 50% PM, 50 % N (Urea) + 50% GM, 50% PM + 50% FYM, 50% PM + 50% GM and 50% GM + 50 % FYM) and two maize varieties (Azam and Jalal). Nitrogen treatments (N) were kept in the sub plots whereas varieties treatment (V) was allotted to the main plots. The experiment was carried out in randomized complete block design with split plot arrangement having four replications. The results revealed that varieties and nitrogen treatment significantly affected all parameters under study. Interactions between N x V were non significant for all parameters. Application of mineral N with organic manure in combination resulted in increased yield and yield components. Application of half Mineral N and half PM produced higher plant height, higher cob length, grain cob-1 , thousand grain weight, grain yield and biological yield of maize. Cultivars influenced yield and yield components of maize and higher maximum plant height, grains cob-1 , cob length, thousand grain weight, grain yield and biological yield was produced by cv. Jalal. It was concluded that Organic and inorganic N application in combination cv. Jalal resulted in higher yield and yield components of maize and hence recommend for higher productivity.
