Changes of organic matter of soil after long-term sewage sludge compost treatment

The application of sewage sludge to agricultural activities has been extensively accepted for better growth and practice during recent years. The production of agricultural land is developed with use of sewage sludge, because it is focused on that such аpplication will increase productivity in аgriculture and solve the problem of disposal as well. Accordingly the sustainable use of the natural resources, principally the protection and advancement of soil come to the front. In the agriculture the utilisation of the natural materials , industrial wastes, by –products is preferred for imoriving the physical, chemical properties, fertility and biological activity of soils.The range of potentially suitable materials may expand further with using of composted sewage sludge to increase the colloid content of sandy soils. The physical properties of sandy soils depend greatly on their organic matter content.MSc/MAInstitute of Water and Environmental Managemen