Abstract
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 year out of eight 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. Averaged across all years of the study, the treatments with deep tillage either every or every-other year had about 3.5% higher corn yields, and soybeans had up to a 2.9% yield increase with some form of tillage.
Highlights
The need for tillage in corn and soybean production in the Kansas River Valley continues to be debated
In 2014, the corn yields were very good and Sudden Death Syndrome lowered soybean yields, but there were no differences between tillage treatments (Tables 3 and 4)
In 2016, which had extremes in soil moisture from dry to saturated, the deep tillage treatments produced higher yields than did shallow tillage in corn, but soybean yields were similar for both tillage treatments
Summary
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 year out of eight 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. Averaged across all years of the study, the treatments with deep tillage either every or every-other year had about 3.5% higher corn yields, and soybeans had up to a 2.9% yield increase with some form of tillage
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