December 2022 | Volume 35 | Issue 4 | Page 644 Pakistan Journal of Agricultural Research Research Article Abstract | Te most important soil parameters for compressed surfaces are aeration, bulk density, and permeability. Te experiment was managed in a split-plot design with a randomized complete block design with three replications. Results indicated that cone-penetrometer was used to measure the soil compaction of furrow bottom under without-compaction/control (C1), compaction with three passes of tractor wheel (C2), and compaction with six passes of tractor wheel (C3) treatments for the years 2017-18 and 2018- 19. In the case of clay loam (S1) soil compacted under treatment C3, the compaction was maximum with mean values of 1.23 MPa followed by treatment C2 with 1.09 MPa and C1 with compaction of 0.55 MPa during the 2017-18 Rabi crop season. While, for silty clay loam (S2) soil compacted under treatment C3, the compaction was maximum with mean values of 1.12 MPa followed by treatment C2 with 0.80 MPa and C1 with compaction of 0.42 MPa during the 2017-18 Rabi crop season. Similarly, during the year 2018-19, for diferent dry densities under soil compaction treatments C1, C2, and C3, the soil penetration resistance values were 1.10 MPa, 0.81 MPa, and 0.40 MPa, respectively. Te reduction in soil EC1:5 was determined in the without-compaction/control (C1) plots under both cropping years. However, substantial change in the soil EC1:5 was observed in compact treatment three tractor wheel passes (C2) and six tractor wheel passes (C3) plots. Generally, a slight rise in soil EC1:5 was noticed in both C2 and C3 plots over C1 treatment plots for both cropping seasons. Furthermore, a slight change in the soil pH was observed in compact treatment, three tractor wheel passes (C2) and six tractor wheel passes (C3) plots during both the years. Mostly, a slight rise in soil pH was noticed in both C2 and C3 plots over C1 treatment plots. It is also noticeable from the data that compacting the soil with a tractor using three-wheel and six-wheel passes displayed no diference in pH in bed furrow treatment plots. Our fndings concluded that the efect of soil compactions on soil EC and pH values were formed slightly increased during both years as compared to without-compaction treatment. Nevertheless, soil EC values were increased with increasing soil depths under C2 and C3 over C1 treatment, while maximum EC values were recorded under furrow plots among all soil depths and soil diferent soil textures. Even though the soil pH was not afected by soil compaction treatments under all soil depths and soil textures during both years. Rahim Bux Vistro 1 *, Mashooque Ali Talpur 1 , Irfan Ahmed Sheikh 1 , Muneer Ahmed Mangrio 2 , Rajish Kumar Soothar 1 , Mian Noor Hussain Asghar Ali 3,4 , Imran Ali Dhamach 4 , Muhammd Urs Mirjat 1 and Abdul Saboor Soomro 2 1 Department of Irrigation and Drainage, Faculty of Agricultural Engineering, Sindh Agriculture University, Tandojam, Sindh, Pakistan, 70060; 2 Department of Land and Water Management, Faculty of Agricultural Engineering, Sindh Agriculture University, Tandojam, Sindh, Pakistan, 70060; 3 Institute of Food Science and Technology, Chinese Academy of Agricultural Science (CAAS)/Key Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Afairs, Beijing, China, 100193; 4 Department of Farm Structures, Faculty of Agricultural Engineering, Sindh Agriculture University, Tandojam, Sindh, Pakistan, 70060; 5 Soil Salinity and Reclamation Research Institute, Agriculture Research Center, Tandojam, Sindh, Pakistan, 70060. Changes in Subsoil Compaction and Salinity Caused by Tractor Wheels Passes During Tillage Practices Under Different Soil Types