TY - JOUR ID - 10500 TI - Study of Compaction Effect on the Active Pores on Conductivity Water of the Loamy Soil Using Disk Infiltrometer JO - Irrigation Sciences and Engineering JA - JISE LA - en SN - 2588-5952 AU - Ramezani, N. AU - Sayyad, G. AU - Barzegar, A. R. AU - Mansuri, Y. AD - MSc Student of Soil Science, Faculty of Agriculture, Shahid Chamran University AD - Assistant Professor, Department of Soil Science, Faculty of Agriculture, Shahid Chamran University AD - Professor, Department of Soil Science, Faculty of Agriculture, Shahid Chamran University AD - Assistant Professor, Department of Agriculture Mechinery Engineering, Faculty of Agriculture,Shahid Chamran University Y1 - 2012 PY - 2012 VL - 35 IS - 1 SP - 61 EP - 70 KW - Effective porosity KW - Number of pores KW - Ppercent flow through pores KW - Hydraulic conductivity DO - N2 - The major topic in the study of the compactionis the soil pore size and type. Soil compaction can be significantly reduced with changes in soil porevolume, water infiltration and availability of plants to air and water. Sumeffects of the above may lead to reduced soil quality.Therefore a field studywas performed to evaluate the effect of soilcompaction on movement of waterin the pores (coarseand medium size pores) of loamy soil. Acompletely randomized block was designed with three replications, applying blank(No teraffic passing), once, twice, three times, four times and eight times oftractor passings. Number of pores and percent flow through them with effectiveporosity and hydraulic conductivities (saturated and unsaturated), wasdetermined in the field using disc infilterometer in four potentials (0, -3, -5and -15 cm of water). Our results revealed thatin all of the treatments medium size poreswere many times of large ones hence,both sizes decreased with compaction. Results of disc Infilterometer showedthat coarse and medium size pores (macro and meso pores) of eight times tractorpassings relative to control decreased 85 and 62.5 percent respectively. The majoreffect of compactionwas onthelarge size pores. Themediumpore sizewasmoreimpressed thanlarge pore size. Numberof medium poresinthe soil wasless than large ones. UR - https://jise.scu.ac.ir/article_10500.html L1 - https://jise.scu.ac.ir/article_10500_701bb30cae70d1ad94b4b5860c6f293d.pdf ER -