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Home > Archives > Volume 20, No 8 (2022) > Article

DOI: 10.14704/nq.2022.20.8.NQ44910

The effect of operational pressure on the irrigation system with fixed sprinkler and moisture depletion and soil softening on moisture content and salt distribution of clay soil and growth of barley plant (Hordeum vulgare L.)

Bahaa A.J. AbdulKarem, Ali Hamdhi Dheyab


A field experiment was conducted at the research station of the College of Agriculture / University of Basra at the Karmat Ali site, during the 2020-2021 cropping season in clay soil to study the effect of the operating pressure of the fixed sprinkler irrigation system, moisture depletion and the degree of soil softening on the moisture content, salt distribution of the soil and crop growth Barley (Hordeum Vulgare L.). Experiment coefficients, which include three main factors, were distributed in the Amelia experiment. The factors were the operating pressure factor, which includes three pressures, 150 kPa (P1), 250 kPa (P2) and 350 kPa (P3), and the moisture depletion factor, which includes the depletion at 75% of ready water (M1) and depletion at 50% of ready water (M2), and the third factor is the soil softening factor by disc harrows, and it includes softening the soil after plowing once (C) and softening the soil three times (S). The experiment’s parameters were distributed in three replications, using a randomized complete block design (R.C.B.D) for three replicates. The experimental units were planted with barley crop, where irrigation is carried out according to the moisture depletion of the ready water of the soil, in addition to the requirements for washing 20%. Soil samples were taken at the middle and end of the growing season, and for soil depths, which are three depths: (0-15) cm (d1), (15-30) cm (d2) and (30-45) cm (d3). The results showed that the increase in the operating pressure from P1 to P2 and then P3 result to an increase in the moisture content and a decrease in the salt distribution of the soil. One whet (C) on the soil softening treatment three whet (S) in increasing the moisture content and decreasing the salt distribution of the soil at the middle and end of the growing season.


Irrigation with fixed sprinkler, moisture depletion, degree of soil softening, moisture content, salt distribution.

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