In this study, agricultural usage of food industry wastewater treatment plant sludge was researched. Within the scope of our work the study was carried out in field conditions. Before sowing the maize, increasing levels of sludge (0-30-60 and 90 ton ha(-1)) were mixed with the soil. Three times plants were sampled during that period of development and crop harvest. Changes in soil properties caused by sludge application before planting and after harvest and the effect on corn plant growth and mineral content were determined.