Study on effect of different tillage methods and fertilizer application on corn yield
2014
Heidari, A. | yazanpanah, A.R. | Dezfolian, M.E. | Zaree, S. | Ahmady, M. | Shabanian, M. | Saedi, H. | Salimi, A.R. | Mansouri Alam, A. | Gholipour, A.A.
Traditionally, most corn land in Hamedan Province has been prepared for planting by moldboard plowing followed by a number of secondary tillage operations. In recent years conservation tillage systems have become more popular. The research was conducted in the form of a split plot experimental design with six treatments and three replications. Main plots were tillage methods including: (T1) conventional tillage (moldboard plow + cyclotiller + roller), (T2) combination tiller (chisel plow + roller) (T3) bandary tillage with chisel blades. two P fertilizer application including: (F1) fertilize broadcasting and (F2) fertilizer bandary placement were considered as sub plots. During growing seasons, soil mechanical resistance (cone index), soil bulk density and water infiltration in soil were measured. At the end of the growing season (harvesting time), corn yield and its components were measured. Results indicated that tillage methods and soil depth had a significant effect on the soil bulk density and cone index. The effect of tillage on water infiltration in soil was significant. The effect P fertilizer application on corn yield was significant (P΅ά0.01) and P fertilizer bandary placement with mean corn yield,10862 kg/ha had higher yield value than the fertizer broadcasting with mean corn yield, 9965 kg/ha. Although, the difference between tillage methods for corn yield was not statistically different, T2 treatment with mean corn yield, 10913 kg/ha had higher yield value than the other two tillage treatment (T1 with mean corn yield, 10106kg/ha and T3 with mean corn yield , 10222 kg/ha).
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