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Survey for weeds and their competitive effect in corn and soybean fields of Essex and Kent counties in Ontario

, : Survey for weeds and their competitive effect in corn and soybean fields of Essex and Kent counties in Ontario. Weed Survey Series (85-2): 54

The information presented is the result of research studies carried out in 1975 and 1977-9. 151 maize and 156 soyabean fields were surveyed. Each field contained 10 paired plots of 6 crop rows 3 m long. Each plot received the weed control method used by the grower and in addition uncontrolled weeds were hand weeded in one half of each plot. 45 weed spp. were found in the maize fields with the 9 grassy spp. being the most troublesome. The soyabean fields contained 52 weed spp.


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