Russian agriculture consultancy Sovecon said on Friday that it had raised its forecast for Russia's 2021 wheat crop by 1.5 million tonnes to 82.4 million tonnes.
CBOT July corn was last down 8-1/4 cents to $6.90-3/4 per bushel, while new-crop December corn eased 12-1/4 cents to $6.04-1/4.
Commercial participants lowered their net short position to 110,351 contracts from 116,691 a week earlier.
In Euronext's rapeseed futures and options, non-commercial market participants increased their net short position to 12,119 contracts from 10,594 a week earlier.
MGEX spring wheat leading CBOT soft red winter wheat and K.C. hard red winter wheat contracts higher, with dry conditions in northern US Plains fueling the gains.