Effect of Different Tillage Methods on Yield and Yield Components of Forage Corn
Field experiments were conducted for two successive years to study the response of forage corn to different methods. Tillage treatments in the study were moldboard plow + two passes of disk harrow as conventional tillage (CT), two passes of disk harrow as reduced tillage (RT), one pass of disk harrow as minimum tillage (MT) and no-tillage (NT) as direct drilling method. The statistical results of the study indicated that tillage method significantly (P 0.05) affected dry biological yield (DBY), dry grain yield (DGY) and number of plants per hectare (NPPH), but there was no significant difference in other yield components such as number of ears per plant (NEPP), number of rows per ear (NRPE), number of grains per row (NGPR), 1000 grain weight (1000GW), plant height (PLTH) and stem diameter (STMD). The maximum value of DBY (13.2 t ha ), 1 DGY (4.15 t ha ), NPPH (39830) and NEPP (0.92) was obtained in case of CT treatment, while maximum value 1 of NGPR (37.0), PLTH (178 cm) and STMD (2.0 cm) was observed in case of RT treatment. Also, maximum value of NRPE (14.7) and 1000GW (244 g) was noted in case of NT treatment. On the other hand, the minimum value of DBY (7.40 t ha ), DGY (2.39 t ha ) and NPPH (20390) was obtained in case of NT treatment, while minimum 1 1 value of NEPP (0.89), PLTH (167 cm) and STMD (1.7 cm) was observed in case of MT treatment. Also, minimum value of NRPE (13.7), NGPR (35.2) and 1000GW (235 g) was noted in case of CT treatment. Accordingly, moldboard plow followed two passes of disk harrow was found to be more appropriate and profitable tillage method in improving growth and yield of forage corn in the arid lands.