Large amounts of coal combustion by-products (CCBs) are produced when coal is burned to generate electricity. Beneficial uses of CCBs are desired when these materials are discarded. Only ～25% of the CCBs produced were being used beneficially in 1995. One beneficial use of CCBs could be as a soil amendment (source of mineral nutrients, substitute for limestone, and conditioner of physical soil properties) on agricultural/pasture/forest land, especially on acidic soils. One concern for using certain CCBs on soil is the potential toxicity of boron (B) to plants.
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