IPI International Potash Institute
IPI International Potash Institute

Scientific abstracts

Potassium, Sulfur, and Liming Value of Ash Co-Product from Corn Stover Processing for Ethanol Production
Groenenboom, S.J., and A.P. Mallarino
Published in:
Agron. J. 110(1):115- 126 (2018), English


Ash results from the processing of corn (Zea mays L.) stover for ethanol production and subsequent combustion to produce electricity. However, the potential value of this ash as a soil amendment has not been fully evaluated. Preliminary chemical analyses of the ash obtained for this study showed potential to raise soil pH and supply K and S. This potential was evaluated at two Iowa fields comparing ash with KCl fertilizer, gypsum, and CaCO3. Three 2-yr separate K, S, and lime trials were established at each site, where several rates of each material were applied only the first year. Corn was planted in 2014 and soybean [Glycine max (L.) Merr.] in 2015. Soil samples (15-cm depth) were taken at the V6 growth stage of each crop and after crop harvest for analyses of pH, soil-test K, and extractable SO4-2. Leaf samples were taken at the corn R1 growth stage and soybean R3 growth stage for analyses of total K and S. There were large K effects on grain yield, soil-test K, and leaf K concentration but no differences between the K sources. First-year soil SO4-2 at the V6 corn growth stage and leaf S at the corn R1 stage showed that S supplied by the ash was less than for gypsum, but other measurements were inconclusive as of differences between the S sources. The ash had liming value comparable to pure CaCO3.

Return to the Scientific abstracts

In your Language

Choose your Crop

Choose your App
IPI research e-ifc app for iPad and iPhone available now from the Apple App Store
IPI Research App for Android and Apple phones and tablets.

The Role of Potassium (K) in the Plant (in Urdu)
Potassium and Nitrogen Use Efficiency (NUE) in Urdu
Potassium in Soil and Plant Systems (in Urdu)
IPI profile infographic
Chloride - an essential nutrient
Potassium and Nitrogen Use Efficiency (NUE)
Managing Water and Fertilizer for Sustainable Agricultural Intensification - infographic
Potassium Improves your Crop Quality
Potassium Improves your Health
Potassium in Soil and Plant Systems
The Role of Potassium (K) in the Plant
What does a Plant Need to Live
Assessment of the Impact of Targeted Use of Fertilizer on Irrigated Rice in Asia
The Role of Potassium (K) in the Plant (in Urdu)

New publication