Study of some physical properties of sweet chestnut and The oaks wood for small-diameter trees resulting from breeding and development at the Breshin site in the Musayaf area

This research has studied some of the physical properties for Castanea sativa Mill. And Quercus cerris subsp. Pseudocerris, which have small diameters resulting from the processes of breeding and development and are related to the most important uses of modern wood.

Physical properties of two soil types from Darya and Abe Jerash and the relationships among their components

This study was conducted at Darya and Abe Jerash regions to study some Physical properties of the two soil types such as: soil depth, soil texture, bulk density, Specific weight and Porosity. Results showed that Bulk density average decreased and thetotal porosity increased in the soil of Darya compared to soil of Abe Jerash, due to the high percentage of clay in the first type compared to the second one. Bulk density average in general, increased in both soils with depth. Presence of a strong and positive relationship between the Specific weight and the percentage of sand in the soil of Darya and it was also strong but inverse in the soil of Abe Jerash, but the relationship was. The coefficient of determination was high for silt with Specific weight in the soil of Darya, while this factor was low in the soil of abe Jerash, indicating the high quality of the regression equation that represents the relationship between the two variables in soil of Darya.