Using Soil Organic Conditioners to Improve the Heavy Clay Soils Characteristics Under Deficit Ir-rigation Conditions | ||
| Fayoum Journal of Agricultural Research and Development | ||
| Volume 39, Issue 3, October 2025, Pages 448-467 PDF (772.43 K) | ||
| Document Type: Research articles. | ||
| DOI: 10.21608/fjard.2025.372493.1116 | ||
| Authors | ||
| Abdel-Aty M. Ibrahim* ; Nagat G. Mohamed; Sameh A.S. Hassanin | ||
| Soils and Water Department, Faculty of Agriculture, Fayoum University, Fayoum 63514, Egypt | ||
| Abstract | ||
| Clay soil has very low water permeability and aeration. Soil organic conditioner (SOC) application improves the soil properties. The objective of this study is to estimate the effect of SOC application on some properties of the heavy clay soils under deficit irrigation. Three main plots to receive the irrigation treatments, i.e., I1 (100%), I2 (80%), and I3 (60%) of ETc. Four sub-main plots to receive SOC application rates, i.e., zero (control), 5 t ha-1 of vermi-compost (VC), 10 t ha-1 of biochar (Bi), and 2.5 t ha-1 of VC + 5 t ha-1 of Bio. The results illustrated that the mean values of soil dry bulk density and soil salinity significantly increased by 1.59 and 3.17% and by 20.52 and 42.35% when the deficit irrigation increased from I1 to I2 and I3, respectively. While the mean values of total porosity, void ratio, hydraulic conductivity, and organic matter significantly decreased by 1.08 and 2.36%, 2.30 and 4.87%, 8.0 and 16.0%, and 7.69 and 12.82% when the deficit irrigation increased from I1 to I2 and I3, respectively. The effect of SOC on the soil's total porosity, void ratio, hydraulic conductivity, ECe, and organic matter values could be descending in the following order: VC > (½ VC + ½ Bi) > Bi > control. Quickly drainable pores and useful pore values were improved with I1 and vermi-compost treatments. It could be recommended that irrigation treatment (I1) with VC application be used to improve the heavy clayey soil characteristics and to achieve the optimum clay soil productivity. | ||
| Keywords | ||
| Deficit irrigation; Soil organic conditioners; Soil characteristics; Heavy clay soils | ||
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