erthnsky at bellsouth.net
Sun Aug 24 22:15:17 EDT 2008
Totally awesome. I wish I had access to a pasture nutrition class...
Karen L. Black wrote:
> Rob asks:
>> What's the rule of thumb for amount of lime needed to raise ph one point?
> I don't know of a rule of thumb. It depends on how many hydrogen ions the
> calcium ions need to displace (the "buffering capacity" or cation exchange
> capacity). The more clayey a soil is, the higher the CEC.
> I know that my "silty clay loam" pastures, with a pH around 5.5, would see a
> pH increase from 2 tons of lime per acre. One ton would be a maintenance
> level, and more than three tons at once is not recommended. (This from my
> pasture nutrition class several years ago). My instructor was keen on
> hands-on, and suggested that we try several liming levels (i.e. parallel
> strips at different amounts) to see what the pasture did best with. I'm
> getting around to it this year.
> If you have done a soil test, here is an explanation of the info:
> http://www.gov.pe.ca/af/agweb/index.php3?number=74158. If you haven't, you
> could try my instructor's method. One ton per acre is roughly 3/4 oz. per
> square foot, or 4.5 lb. per 100 square feet.
> Hope this is of some help,
> Karen Black
> Norton Creek Farm
> Blodgett, OR
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BevanRon of EarthNSky Farm NW Georgia USDA Zone 7
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