The researchers predicted how much carbon hybrid poplar trees can store in their aboveground biomass when planted on different types of land in southern Ontario, Canada. They tested different poplar clones in four sites and found that some clones are better for storing carbon than others. Clones like DN154 and FFC1 are good for land with high suitability, storing around 2.13 to 2.19 metric tons of carbon per year per hectare. On the other hand, clones like DTAC29 and DTAC26 are not as good, storing only 0.56 to 0.88 metric tons of carbon per year per hectare. The study also found that a clone called NM6 can store 1.53 metric tons of carbon per year per hectare on land with severe limitations. Overall, planting poplar trees on marginal lands in southern Ontario can help store a significant amount of carbon in the trees for at least 15 years, supporting the government's tree planting program.