Ground improvement as a result of stabilization with cement has its impact on soft soils such as sandy clay in engineering constructions. Stabilized soils are also used in foundation design, where improvement of mechanical properties is needed. Because of these reasons, knowledge of physical and mechanical properties is needed. The relationship stress – strain of soils stabilized with cement is often unclear and strength characteristics need to be clear. In this paper results of physical and mechanical properties soil stabilized with cement are presented.
In this paper we report on comparison of microbial and biochemical properties of a loamy-sandy soil that 10 years earlier had been treated for 17 years with different rates of slurry or mineral fertilizers. Long-term fertilization of the soil with different doses of cattle slurry significantly improved microbial (biomass, respiration, numbers), biochemical (activity of dehydrogenase and phosphatases) as well as chemical properties (C and N contents, pH) of the soil as compared to the NPK-treated soil. Results of our study indicate that slurry application may cause long-lasting, beneficial changes in biological and physicochemical characteristics of soil.