Effect Ash and Coal Produced from Fire on Some of Soil Properties Especially Water Retention

Produced ash and coal from fire influence the soil and few studies about these effects are available. Then this study performed to investigate the effect ash and coal on hydrological, physical and chemical soil properties in Charat rangeland that had a history fire formerly. Systematic-random sampling was implemented in two plant types Astragalus gossypinus and Artemisia aucheri using 6 transect and 4m2 quadrates 60 and plant and soil samples were obtained. Experimental treatments were prepared including control soil, composition soil and ash manually and also with artificial rain, composition soil and coal manually and also with artificial rain in the laboratory and were measured characteristics of the texture, saturation moisture, pH, organic matter, field capacity, wilting point, available water and retention capacity. ANOVA results for mean comparison soil, ash and coal properties had shown that ash had the percent of silt and pH more than soil and organic matter and bulk density lower than soil. Also the results of multivariate analysis for indication of effects treatments had shown that manual composition of ash and coal into soil had increased field capacity and available water while composition soil and coal with artificial rain had no significant effect on them.