A total of 30% of the intended US corn acreage has already been planted, the US Department of Agriculture said after Monday's market close in its weekly Crop Progress report.
That is 14 percentage points above the five-year average, and 14 percentage points above year-ago figures, the report said.
Emerged corn for the week ending April 24 rose 3 percentage points from last week to 5%.
Front-month CBOT corn futures settled 5.25 cents higher Monday to $3.7700/bushel.
Corn is the main competitor for dried distillers grains and also the main feedstock of US-produced ethanol.