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Study evaluated the effects of coal mine waste and organic manure on soil fertility and Brassica napus growth, suggesting improved crop production methods.
The sustainable utilization of coal mine waste (CMW) as a soil amendment remains insufficiently explored, particularly regarding its combined application with organic manure to improve soil fertility and crop growth. This study evaluated the feasibility of CMW as a soil amendment to improve soil fertility and the early vegetative growth of Brassica napus L. The physicochemical properties of CMW, agricultural soil, and organic manure were characterized, and their effects on soil pH, nutrient availability, heavy metal concentrations, and plant growth were assessed in a greenhouse pot experiment. Raw CMW exhibited alkaline characteristics with appreciable calcium and iron concentrations but low nitrogen and phosphorus. Incorporation of CMW significantly increased soil pH, whereas organic manure moderated alkalinity and enhanced macronutrient availability, with the combined application of 15% CMW and 1.5% manure improving plant growth by over 84% relative to the control. Heavy metal concentrations in all treatments remained below the international standards. Overall, the results demonstrate that the co-application of CMW and organic manure can improve soil fertility and support sustainable crop production, although field-scale validation is recommended to assess long-term agronomic performance.
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Ntawanga et al. (2026) studied this question.
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