Impacts of conservation tillage systems on long-term crop yields

Kenneth R. Olson, Stephen A. Ebelhar

Research output: Contribution to journalArticlepeer-review

Abstract

The 20 year study was conducted in Southern Illinois (USA) on land similar to that being removed from Conservation Reserve Programme (CRP) to evaluate the effects of conservation tillage systems on maize and soybean yields and for the maintenance and restoration of soil productivity of previously eroded soils. The effects of tillage on soil loss from erosion and Soil Organic Carbon (SOC) change were determined. The No-Till (NT) system had significantly less soil loss from erosion and maintained more SOC than the Mould board Plough (MP) and Chisel Plough (CP) tillage systems. The 10 year average maize yields were slightly higher for MP than NT and CP systems as a result of a significantly higher maize yield in the first year. The 10 year average NT soybean yield was slightly higher than for the MP and CP tillage systems. Crop yields for 10 years maize and 10 years soybean appear to show long-term productivity of NT compared favorably with that of MP and CP tillage systems.

Original languageEnglish (US)
Pages (from-to)14-20
Number of pages7
JournalJournal of Agronomy
Volume8
Issue number1
DOIs
StatePublished - 2009

Keywords

  • Conservation tillage
  • Crop growth
  • Erosion
  • Maize
  • Plant population
  • Soil organic carbon
  • Soybean

ASJC Scopus subject areas

  • Agronomy and Crop Science

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