the single plot of nitrogen-fixing broadleaf species measured in our study (D. nigra) did not indicate a greater ability to sequester soil C than non-leguminous broadleaf
trees. However, we could not statistically test the difference due to limited representation of D. nigra stands at our study site. In absolute terms L. styraciflua and G. arborea indicated an advantage in soil carbon sequestration. Slightly greater soil carbon sequestration in broadleaf plantations compared to conifers in the Broadleaf– Conifer paired plots would be expected based on earlier observations
that conifer plantations can sometimes reduce soil carbon in the mineral fraction following reforestation of pastures