Abstract: During the 2010–2012 periods in the Research Institute of Mountain Stockbreeding and Agriculture (RIMSA) in Troyan the effect of foliar fertilizing with the organic fertilizer BioLIFE on the green and dry mass yields and weed infestation of annual summer spring cereal–leguminous mixture was established. The following doses of foliar fertilizer were tested as variants in a mixed crop of fodder maize and white lupine: 1. Untreated with BioLIFE (Standard); 2. Treatment with BioLIFE–2 l/ha; 3. Treatment with BioLIFE–3l/ha; 4. Treatment with BioLIFE–4l/ha. It was found that the application of 4 l/ha BioLIFЕ increased the obtained green and dry mass by 20.43 and 24.45% more than the untreated standard crop. The exceeding in the productivity of the same variant, as against the obtained ones at the lower doses of foliar fertilizer was by 21.17%, 10.36% and 26.63%, 11.51% respectively. These variants were superior to the standard in yielding capacity of green and dry mass by 7.39–14.98% and 8.65–19.99%, respectively. The weed infestation of the mixture sowing was lower for the treatment with foliar fertilizer and the tested doses did not influence it significantly.
Key words: summer mixture, foliar fertilizer, green and dry mass, weeds infestation.