EN
The objective of this work was to present the importance of legume-symbiotic nitro gen fixation for sustainable agriculture. The main attention was focused on the effects of soil and weather conditions as well as on the effects of agricultural conditions on the symbiosis of legumes with root nodule bacteria. The results of the latest investigations on the inoculation methods and utilization of symbiotic nitrogen by mixture components (grasses, cereal crops) with leguminous plants were presented.