Agronomy Library > Event & Field Reports

The Effect of Zero Tillage on Weed Populations
Author: David Kelner, Manitoba Agriculture
Date Created: June 04, 1997
Last Reviewed: February 14, 2007
Summary   · Zero tillage practice is a growing trend in Manitoba. · The present weed survey was undertaken in 1994 to determine if differences in weed populations occur among zero and conventional tillage systems in Manitoba. · Approximately 65 zero and 65 conventional tillage fields were surveyed in 1994. Sampling was conducted in the spring prior to spraying and in the fall after tillage had occurred on conventional fields, but prior to spraying for winter annual weeds (mid-October). A survey of the field borders was also conducted to determine if there were new weed problems encroaching from the field edges. · Preliminary results indicate that weed populations were similar among tillage systems, with the exception of wild mustard. As well, there is an indication that zero till fields may host a more diverse weed community in the field borders.