Abstract
AbstractRelationships between fly ash application to soil and Mo availability were evaluated by greenhouse and laboratory procedures. Seventeen samples of fly ash under study ranged from 5.6 to 39.3 ppm in total Mo content. Thirteen of the fly ash samples were alkaline in reaction, and these samples neutralized from 0.01 to 3.74 meq H3O+/g. Incorporation of two samples of fly ash, which contained the extremes in the range of total Mo content, increased alfalfa (Medicago sativa L.) yield on an acidic Groseclose silt loam. The increase in yield was attributed to alleviation of toxicities associated with low levels of soil pH. Molybdenum uptake data indicated approximately equal availability of Mo in fly ash and in Na2MoO4·2H2O.
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