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Related Experiment Videos

Fly ash as a liming material for cotton.

Gene Stevens1, David Dunn

  • 1Department of Agronomy, University of Missouri-Delta Research Center, 147 State Highway T, P.O. Box 160, Portageville, MO 63873, USA. stevensw@missouri.edu

Journal of Environmental Quality
|February 18, 2004
PubMed
Summary

Fly ash application increased soil pH but reduced cotton yield in the first year. Residual effects showed increased yields in the second year, suggesting fly ash is not ideal for cotton soil amendment currently.

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Area of Science:

  • Agricultural Science
  • Soil Science
  • Environmental Science

Background:

  • Coal combustion produces fly ash, a potential soil amendment.
  • Soil acidity can limit crop productivity, including cotton.
  • Understanding fly ash's impact on soil properties and crop yield is crucial for sustainable agriculture.

Purpose of the Study:

  • To evaluate the effects of fly ash application on soil acidity and cotton (Gossypium hirsutum L.) growth.
  • To determine the impact of fly ash on soil chemical properties and cotton lint yield.
  • To assess the short-term and residual effects of fly ash as a soil amendment.

Main Methods:

  • Field experiment on Bosket fine sandy loam soil.
  • Application of fresh fly ash at rates of 0, 3.4, 6.7, and 10.1 Mg ha(-1) before cotton planting in 1999.

Related Experiment Videos

  • Monitoring of soil pH, manganese, boron, and sodium levels.
  • Measurement of cotton lint yield in 1999 and 2000.

    • Main Results:

    • Fly ash significantly increased soil pH above 6.0 within 60 days.
    • Manganese levels in cotton petioles decreased with higher fly ash rates.
    • Soil boron and sodium concentrations increased; no visual boron toxicity observed.
    • Cotton lint yield decreased by 12 kg ha(-1) per Mg of fly ash in 1999.
    • Residual fly ash (3.4 and 6.7 Mg ha(-1)) significantly increased cotton yields in 2000.

    Conclusions:

    • Fly ash effectively neutralizes soil acidity but can increase soil boron and sodium.
    • Initial adverse yield effects in the first year suggest fly ash is not currently suitable for cotton amendment on this soil.
    • Further research may be needed to optimize fly ash application rates and timing for cotton cultivation.