Effect of Different Tillage Systems on Wheat Yield under Laser Land Leveling

"A field experiment was conducted in Al-Adwaniyah region, located on latitude 33° 13' 93.59"" N, and longitude 44° 37' 91.37"" E, at an altitude of 31 m above MSL, during the autumn season of the year 2018 AD to know the effect of laser land leveling, tillage and discharge on water productivity, wheat growth and yield. The experiment consisted of three treatments. The first was the tillage implement with two levels: the mold board plow (T1) and the chisel plow (T2). The second was the slope percentage of the soil surface leveling, with three levels: the conventional leveling (L0), the leveling with the slope percentage of 0.15% (L1), and the leveling with the slope percentage of 0.30% (L2). The third was the discharge rate with two levels: discharge rate of 16 L sec-1 (Q1), and discharge rate of 24 L sec-1 (Q2). The experiment was designed according to the split-split plots design with three replicates. The results obtained can be summarized as follows: 1. Crop height, weight of 1000 grain and yield, recorded their highest value With T1 of 73.07 cm, and 5.442-ton ha-1 , respectively, weight of 1000 grain with T1 Equally with T2 of 40.36 g 1000 grain-1 . with L1 of 79.69 cm, 42.20 g 1000 grain-1 and 6.347 ton ha-1 , respectively. With Q1 recorded the highest crop height, weight of 1000 grain and yield of 72.62 cm, 40.98 g 1000 grain-1 , and 5.741-ton ha-1 , Respectively. With T1L1 recorded the highest crop height, weight of 1000 grain and yield of 80.15 cm, 42.50 g 1000 grain-1 and 6.480-ton ha-1 , respectively. With T1Q1 recorded the highest crop height,weight of 1000 and yield of 74.65 cm, 41.09 g 1000 grain-1 and 5.796-ton ha-1 respectively. With L1Q1 recorded the highest crop height, weight of 1000 grain and yield of 79.80 cm, 42.65 g 1000 grain-1 and 6.644-ton ha-1 , respectively. With T1L1Q1 recorded highest crop height, weight of 1000 grain and yield of 82.02 cm, 43.07 g 1000 grain-1 and 6.809-ton ha-1, respectively. 2. The root depth recorded highest depth with T2 of 61.83 mm. With L0 of 67.60 mm. With Q2 of 61.33 mm. With T2L0 of 69.35 mm. With T2Q2 of 63.00 mm. With Q2L0 of 69.35 mm. With T2L0Q2 of 71.10 mm. 3. The crop water productivity and field water productivity recorded the highest productivity with T1 of 13.294 and 13.571kg mm 1 ,respectively. With L1 of 15.079and 15.407 kg mm-1 , respectively. With Q1 of 11.735 and 11.825kg mm 1, respectively. With T1L1 of 16.220and16.719 kg mm 1, respectively. With T2Q2 of 14.326and14.685 kg mm 1 , respectively. With L0Q2 of 15.959and16.374 kg mm 1, respectively. With Q1T1L1 of 17.220and 17.811kg mm 1, respectively."