Abstract
The effect of different percentages of two fly ashes, derived from the combustion of coals from Poland (PO) and South Africa (SA), on organic N mineralization and nitrification in two different soils, was investigated. Following the addition of 2, 5, and 10% (w/w) PO and SA, the N mineralization constant K 1 decreased in the soil low in organic matter content. The addition of the same percentages of the two fly ashes to the soil higher in organic matter content gave contrasting results. When nitrification was taken into account, the nitrification constant K2 increased, following the addition of 2, 5, and 10% (w/w) PO and SA to the two soils. The most noticeable exception was the addition of 10% SA to the soil low in organic matter content, where K 2 decreased.
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Cervelli, S., Petruzzelli, G. & Perna, A. Fly ashes as an emendment in cultivated soils. Water Air Soil Pollut 33, 331–338 (1987). https://doi.org/10.1007/BF00294201
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DOI: https://doi.org/10.1007/BF00294201