[Effect of sewage sludge treatments on corn crop, water consumption, and some natural soil properties]
1989
Muhsen, N.I. | El-Kattari, S. | Battikhi, A. (Jordan Univ., Amman (Jordan))
An experiment using four sewage sludge treatments at rates of 0, 2, 4, and 6 tons/dunum (dunum = 1000 m2) incorporated with the surface soil (0-30 cm) was carried out at Jiza Region. Each treatment was replicated three times in a randomized complete block design. The vegetative and grain yields of corn increased significantly due to the addition of sewage sludge. The increase in vegetative yield was 461, 1084, 977 kg/d over the control (1265 kg/d of dry matter yield), while the increase in ear production was 247, 499 and 477 kg/d over the control (676 kg/d) at rates of 2, 4 and 6 tons/d, respectively. The consumptive use of water decreased with increasing sewage sludge. Water consumption was 8.2, 71.4, and 137.9 mm less than the control (747.7 mm) at the different sludge rates. The available water in treated soil increased by 1.16, 19.25, and 23.42%, whereas the infiltration rate of surface soil also increased by 12.8, 17.3, and 27.8% over the control at 2, 4, and 6 tons/d suldge, respectively. The bulk density was slightly decreased in the surface layer
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