This study examines the potential of using metallurgical slag, a by-product from steel production, as an effective soil amendment to boost agricultural productivity. Conducted between 2020 and 2022 in southeastern Romania, the research applied two types of slag (furnace slag and converter slag) to acidic soils. Due to their beneficial composition, including elements like calcium, magnesium, and phosphorus, these materials can enhance soil quality by neutralizing acidity and improving nutrient availability for crops.
The study assessed the effects of slag applications on key soil properties, such as pH levels, humus content, and essential nutrients, as well as their influence on crop yields of maize, wheat, and peas. A primary focus was on monitoring heavy metal levels to ensure safe use, given that some industrial by-products can contain trace metals that may impact environmental and human health. The findings indicated that slag treatments improved soil fertility and increased crop yields without resulting in harmful levels of heavy metals in the soil or crops.
Overall, results showed that using slag as a soil amendment was particularly effective in raising soil pH toward neutral levels and boosting agricultural productivity. This approach offers a sustainable solution by repurposing industrial by-products, addressing the need for soil quality improvement, and helping to mitigate challenges related to soil degradation and food security. The study suggests that, with proper management, metallurgical slag could become a valuable resource for enhancing agricultural output on acidic soils.
Find more here- https://www.mdpi.com/2071-1050/16/4/1503