Effects of vermicompost and water treatment residuals on soil physical properties and wheat yield

A b s t r a c t. The application of vermicompost and water treatment residuals to improve the physical properties in the salt affected soils is a promising technology to meet the requirements of high plant growth and cost-effective reclamation. Therefore, the aim of this study was to investigate the effect of vermicompost and its mixtures with water treatment residuals on selected physical properties of saline sodic soil and on wheat yield. The treatments were vermicompost, water treatment residuals, vermicompost + water treatment residuals (1:1 and 2:1 wet weight ratio) at levels of 5 and 10 g dry weight kg -1 dry soil. The considered physical properties included aggregate stability, mean weight diameter, pore size distribution and dry bulk density. The addition of vermicompost and water treatment residuals had signifi cant positive effects on the studied soil physical properties, and improved the grain yield of wheat. The treatment of (2 vermicompost + 1 water treatment residuals) at level of 5 g kg -1 soil gave the best grain yield. Combination of vermicompost and water treatment residuals improved the water treatment residuals effi ciency in ameliorating the soil physical properties, and could be considered as an ameliorating material for the reclamation of salt affected soils. K e y w o r d s: bulk density, pore size distribution, aggregate stability, wheat yield, vermicompost, water treatment residuals