vertical tillage, no-till, corn, soybeans, long-term tillage
Trends from a tillage study conducted since 2011 have shown no clear differences between tillage systems for either corn or soybeans in lighter soils under irrigation. One out of seven years has shown a yield advantage for either corn or soybeans for any tillage system, which appears to be related to environmental conditions experienced during the season.
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Adee, E. A.
"Tillage Study for Corn and Soybeans: Comparing Vertical, Deep, and No-Tillage,"
Kansas Agricultural Experiment Station Research Reports: