Summer row crops rallied on the CBOT Friday while wheat futures turned lower on expectations that near-term Russian exports will increase substantially. Rumors that Russia may implement a wheat export quota starting in February led to speculation that the country’s exporters will try to front-load shipments, which sparked the decline in wheat futures. Corn and soybeans, however, were buoyed by another set of dry forecasts for Brazil and Argentina, which suggest La Nina’s influence may be strengthening on the continent. Funds were net buyers for the day, securing some 11,000 contracts of corn and 9,000 contracts of soybeans while selling 8,000 contracts of wheat.  Outside markets were mixed with U.S. stocks falling after th...