For study different content of nitrogen effect on dry plant’s organ weight and two rath cultivar maize KSC700 and KSC704 biological yield and a serotine cultivar KSC500. In 2008, 2009 and 2010 in seed and plant improvement institute of Karaj perform a factorial test in accidence block designs case. Absolute nitrogen envisage in three levels of 0, 115, 230 kilograms. Nitrogen effect, cultivar effect and reciprocal effect of nitrogen and cultivar produce meaningful dry weight in plant’s organ and biological yield in 1 % of surface. Increasing use of nitrogen in hectare air organ dry matter content increase maize biological yield in three fetilization, dough and maturation. Fertilizer increase biological yield.
Keywords: dry matter; biological yield; maize hybrid; nitrogen
