Effect of mulch type, mulch size and nitrogen levels on wheat production
To study the effect of mulch types (soaked mulch and Unsuaked mulch) on wheat production, mulch sizes (20, 40 and 60 cm) were used at the rate of 5 t ha-1 at the time of sowing. Maize stalk was used as mulch material. Nitrogen (N) at the rate of 100, 120, and 140 kg ha-1 was also utilized. All P and K and half of the N were applied at the time of sowing while the left-over N was applied with first irrigation. Wheat variety “Siran 2010” was sown at seed rate of 100 kg ha-1 with row to row distance of 30 cm apart. The experiment was arranged in RCBD. Mulch types (soaked vs. unsoaked) had no significant effect on any of the parameters studied. Highest tillers m-2 (319), grains spike-1 (58), grain weight (38.97 g), and grain yield (4278 kg ha-1) and lower weeds density (34) were recorded with small size (20 cm) mulch. With increase in mulch size from 20 to 60 cm weeds number, Tillers m-2, and grains spike-1 decreased with increase in mulch size up to 40 cm but no significant reduction was observed at 60 cm. The effect of N application was significant on all parameters except emergence m-2. With increase in N level, increase in weeds density, tillers m-2 and biological yield was observed. Thousand grain weight and grain yield increase with increase in N but no significant increase was observed at 140 kg N ha-1. Grains spike-1 increased with increase in N up to 120 kg ha-1 and then decreased at 140 kg ha-1. It can be concluded that mulch soaking has no advantage as compared with unsoaked mulch. Mulch size of 20 cm and 120 kg N ha-1 seems to be the optimum size and level respectively for improving wheat yield.