Adjust Combines for Drought-Stressed Soybeans

A few simple tweaks can help get the most from drought-stressed beans, says Gleaner harvesting expert.

Published on: Aug 31, 2012

"There are some simple tricks to keep in mind to prevent excessive damage to soybeans, especially when pods are brittle and prone to shattering," says John Keeler, Gleaner combine product management.

Cylinder speed should be set slower than normal, and it's critical under drought conditions that the concave is level to the cylinder to prevent brittle beans from splitting.

Cylinder speeds typically set at 700 RPM should be lowered to 400 RPM.

Keep an eye on the concave condition, especially in older combines (7–10 years).

A few simple tweaks can help get the most from drought-stressed beans, says Gleaner harvesting expert.
A few simple tweaks can help get the most from drought-stressed beans, says Gleaner harvesting expert.

Slightly reduce airflow in the cleaning shoe, but be careful not to drastically decrease air. Too much or too little air will lead to beans bouncing out.

Drought conditions mean plant materials are lighter and more brittle, which will lead to more stems and pods on the shoe. Instead of crop material coming out the end of the rotor, they will come over the shoe. Airflow should be monitored closely.

Chaffer and sieve screen gaps should be narrowed to maintain air speed, while allowing for enough airflow to remove the pods and other plant material from BB-size beans.

With less clearance room, settings such as threshing units, cylinder-concave and rotor-grates should also be adjusted accordingly.

When plants are lower to the ground, smaller clearances may also be needed between the reel, cutter bar, auger and the feed conveyor chain to make sure stalks are feeding through the platform.

Keeping the cutter bar low is essential in drought years, when plant populations are low and more pods are close to the ground.

Ensure the sickle is sharp. Dull sickles will tend to push stems over rather than cut them cleanly.

The front drum of the feeder should be low enough so that the chain just clears the floor of the feeder house.

"With proper combine settings and attention to detail, growers can reduce harvest losses even when dealing with drought-stressed crops," says Keller. "Be sure to read your owner's manual or consult with your local dealer for help with proper combine settings."

For more information about Gleaner products or to find a dealer near you, visit www.Gleanercombines.com.

Source: Agco