Posted by randallinMo on October 08, 2012 at 08:27:18 from (220.127.116.11):
In Reply to: Re: No Till Lime posted by sdc eastern ia on October 08, 2012 at 07:07:11:
sdc eastern ia......Sir, your statement that "magnesium attaches itself to the soil colloid lessening nutrient uptake"......is in error. Magnesium carbonate has a "greater" neutralizing value than calcim carbonate. In fact, one pound of magnesium carbonate will neutralize the same amount of acid as 1.2 pound of calcium carbonate. Soil tests that are low to medium in magnesium will recommend the use of high mag lime in order to meet the needs of the plant. Magnesium carbonate does NOT lessen nutrient uptake. It generally enhances it. Now, IF your soils are very high in magnesium to begin with, then you "might" create an imbalance that could possibly tie up certain nutrient uptake. Perhaps this is what you meant?
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