The influence of sole- or mixed cropping system on yield and its structure was studied in common bean, in combination with different methods of weed control. A field experiment with four replications and split-plot design was conducted in a farm of the Frankamionka village (Zamosc district), in the years 2004-2006. The cropping system was the first factor (sole cropping vs. strip intercropping with fodder maize and spring wheat) and the method of weed control (mechanical, mechanical-chemical, chemical) was the second one. The strip cropping did not affect total seed yield of bean, but significantly increased the trade yield. The lowest yield was obtained at the mechanical weed control. The mechanical-chemical and chemical methods considerably increased the yield, the difference between them was small, but statistically significant. The methods of weed control significantly influenced the yield structure elements, i.e. number of pods per plant, number and mass of seed per plant, mass of 1000 seeds.
