The CBOT settled mostly lower heading into the long, three-day weekend with traders citing profit taking and uncertain macro markets as reasons for the lower trade. CBOT corn, soybeans, and wheat have all posted six- or seven-year highs this week and the overbought nature of these markets made them ripe for profit taking. Wheat was the only major ag commodity to finish higher on Friday, aided by fresh export tariffs from Russia.  Russia has announced new export duties on wheat, corn, and barley. Russia will increase its export tariff to €50/MT starting 1 March for exports within its 17.5 MMT TRQ. The current export duty was set at €25/MT starting 15 February and will remain effective until the new, higher duty is applicable...