Corn  Argentina’s corn harvest advanced only 1.3 percent this week, reaching 96 percent complete nationwide. The final stretch is always slower, and this year the harvest could extend into September as recent rains further delay fieldwork in Buenos Aires province. Farmer selling has been volatile, picking up when exporters pay premiums for spot corn and ebbing when spot demand fades. Most producers have finished harvest, delivering what was needed during collection, while the balance sits stored in silo bags. Sales now depend on attractive conditions and the ability to move grain off farms, given weather and road constraints. Excess rains have occasionally favored farmers, forcing exporters to pay up for super spot corn to meet s...