Effect of simultaneous cropping and cultivator in different stages of growth on total biomass of corn

In order to evaluation of simultaneous cropping and cultivator in different stages of growth on corn protein content grain yield and yield components in Esfahan. A stripe plot arrangement of treatment in a randomized complete block design with three replications was used. Cultivator is considered as a main factor with 3 levels: (C1= not cultivator application, C2= application of cultivator in 30 cm stage of corn, C3= application of cultivator in 60 cm stage of corn) and treatment of simultaneous cropping is considered as sub factor in 5 levels: (S1= Cultivation of pure corn, S2= Cultivation of corn alfa-alfa, S3= Cultivation of corn mung bean, S4= Cultivation of corn cowpea, S5= Cultivation of corn soybean) were assigned in sub plots. Each sub plot consisted of 4 rows, 6 m long with 60 cm between rows space and 20 cm between plants on the rows and S.C 704 hybrid was used. The result have shown that the effect of cultivator application was significant on wet weight of ear, total biomass, dry weight of ear and husk, number of ear per m2, number of grain per m2 and Harvest index of ear. Simultaneous cropping affect on dry weight of ear and husk, number of ear per m2, protein content and width of ear leaf. The maximum and minimum of total biomass (19.48 and 17.19 ton ha-1) were obtained with the not application of cultivator in 30 cm of corn plants and application of cultivator in 60 cm stage of corn plants, respectively. In the treatment of Simultaneous cropping as the least and most amount of protein content with an average 14.94 and 15.85 %, were pure corn cultivation and treatment of Simultaneous cropping (corn mung bean), respectively.