EN
In experiment carried out in 2001–2004 the influence of irrigation and cultivation system (organic, integrated and conventional) on weed infestation of pea was investigated. It was stated that the number and weight of weeds did not change under the influence of irrigation. The highest weight of weeds was found in the organic system, and the smallest in integrated system. The most numerous species of weeds were Polygonum convolvulus L., Galium aparine L., Chenopodium album L.