1 / 10

Dolomite or Calcite Aglime: What’s Best?

Dolomite or Calcite Aglime: What’s Best?. Tim Wagar, Regional Extension Educator. Definition of Ag Liming Material. Contains Ca and Mg compounds that can neutralize soil acidity Limestone Quicklime Hydrated lime Marl Shells Byproducts. Agricultural Limestone.

Leo
Download Presentation

Dolomite or Calcite Aglime: What’s Best?

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Dolomite or Calcite Aglime: What’s Best? Tim Wagar, Regional Extension Educator

  2. Definition of Ag Liming Material • Contains Ca and Mg compounds that can neutralize soil acidity • Limestone • Quicklime • Hydrated lime • Marl • Shells • Byproducts

  3. Agricultural Limestone • Mixture of - Calcite CaCO3 and Dolomite CaCO3 + MgCO3 • Calcite - 40% Ca and 0-0.6% Mg • Dolomite – 21.7% Ca and 13.1% Mg • Ca:Mg ratio of crops is closer to that of dolomite

  4. Agricultural Limestone Quality • Laboratory measurement of chemical effectiveness – % Total Nuetralizing Power (% TNP) • Particle size from crushing/grinding – (Fineness Index) • (Fineness Index) X (% TNP) = % ENP • % ENP X 2000 lbs X % Dry Matter = Pounds of Effective Neutralizing Power/ton

  5. Liming Materials – Winona Co., 1991

  6. Liming Materials Yield – Winona Co., 1991

  7. Aglime Effects on Alfalfa, Rochester Center Plots - 2000

  8. Aglime Effects on Alfalfa - 2001

  9. Aglime Effects on Alfalfa - 2002

  10. Summary • No agronomic evidence that Mg levels in dolomite lime are detrimental to alfalfa • Should be more concerned about inducing grass tetany in cattle from forages grown on soil with the exclusive use of calcitic lime • No agronomic or economic reason to “import” purported calcitic lime

More Related