EN
The aim of the study was to determine the number, weight and weed composition in the field of winter wheat grown in 2003–2005 on degraded chernozem. In a plot experiment a comparison was made of conventional and simplified presowing cultivation which included two levels of field protection against plant diseases and pests. It was proven that in conditions of fertile and being in high culture chernozem soils, the use of simplified preharvest and postharvest tillage did not increase weed infestation of winter wheat in comparison with conventional tillage. In each experimental object dominated the weed species Viola arvensis and Fallopia convolvulus.