The effects of sub soiling and irrigation regimes on yield and yield components of maize

This study was conducted to determine the effects of sub soiling and irrigation regimes on maize yield. Three sub soiling depth include S0 (without sub soiling), S1 (sub soiling at 40 cm depth) and S2 (sub soiling at 60 cm depth) and three irrigation regimes include I1(Irrigation of after 80 mm evaporation from A class pan), I2 (100 mm evaporation from A class pan), I3 (120 mm evaporation from A class pan) were compared based on split block design with four replication. The results showed that there was significant difference among irrigation regimes and subsoling levels at 1% probability level from point of yield, while irrigation × subsoling nitration effect wasn’t significant. The highest and lowest grain yield was obtained from subsoling (at 40 and 60 cm depth with 12.3 and 12.5 t ha-1, respectively) and non-subsoling (with 11.15 t ha-1) treatments, respectively. The mean comparison of the grain yield regimes showed that I2 irrigation with 12.68 t ha-1 had highest grain yield while I3 regime with 10.78 t ha-1 had lowest grain yield. The grain yield increasing in subsoling at 40 and 60 cm depth than non subsoling treatment was 3.05 and 8.40 percent, respectively. Subsoling efficiency was different in different irrigation regimes. The water use efficiency increased with subsoiling.