Abstract
Field investigations were initiated in 1971 to study the effect of a weathered fly ash sample on yield and nutrient concentration of corn (Zea mays L.) and on composition of displaced soil solutions, and to determine rates of fly ash that could be applied to soils without adversely affecting plant growth. Application of weathered ash at rates ranging from 18 to 288 metric tons/ha did not decrease corn grain yields on either Groseclose silt loam or Woods-town loamy fine sand. Corn grain yields were increased on the Woodstown soil in 1972 where cumulative rates of 216 and 288 metric tons/ha of fly ash were applied, which was attributed in part to increased soil moisture. Plant analysis data indicated that B and Mn concentrations were not increased to toxic levels as had been reported in other investigations with unweathered fly ash. Soil solution data verified that toxic amounts of these elements were not released from the weathered ash sample.
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