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Abstract 118- Summary The present investigation was carried out to study some hydrophysical properties of newly reclaimed soils and their relationship with some physical properties. The soil understudy were different in their texture j i.e. sandy loam, sandy and calcareous sandy clay loam which obtained at kilo 50 and kilo 62 of Cairo-Alex. desert road and the third soil from Nubaria. The hydrophysical properties of soils under consideration were infiltration rate, saturated hydraulic conductivity, unsaturated hydraulic conductivity and soil water diffusivity where the studied physical properties were particle size distribution, bulk density, total porosity and pore size distribution, beside the redistribution moisture content in covered and uncovered plots of the three studied soils. The results can be summarized as follow: Infiltration rate of the three investigated soils decreased with time. Their values were markedly lower in the calcareous sandy clay loam than the other two soils. The relationship between instantaneous infiltration rate and coarse sand, total sand, quickly drainable pores and bulk density were positive and significant at level of 1%. On the other hand the relationships between instantaneous infiltration rate and fine sand, clay, total porosity, water holding pores 119- and fine capillary pores were negatively and significant at level of 1%. The relationships between the saturated hydraulic conductivity and coarse sand. total sand. bulk density and quickly drainable pores were positive and highly significant. On the other hand values of the saturated hydraulic conductivity were negatively and at high level of significancy with fine sand. silt. total porosity. However the hydraul,c conductivity correlated negatively but only 5% level of significancy with clay, water holding pores and fine capillary pores. Values of unsaturated hydraulic decreased with decreased in ~isture content and incieasing time after irrigation. Soil water diffusivity decreased with increased in soil moisture content so this parameter increased as time after irrigation increased. Redistribution of moisture cont.ent in covered and uncovered pints of the three studied soils. Data indicated that moisture content in covered plots were much higher than uncovered plot for studied soils and the highest values of moisture content was recorded in the calcareous sandy clay loam soil and also moisture content increased with increasing soil depth wile decreased with increasing time after irrigation. |