von Wühlisch, Georg - 2016
the areas not devoted to short rotation coppice (SRC) as follows: Aspen 81,000 ha, black poplar & hybrid varieties 38 …,500 ha, grey poplar 5,500 ha, white poplar 2,600 ha, balsam poplar 19,200 ha, in total 147,000 ha. During the period under …, which amount to several million tonnes. Efforts have been continued to preserve the remaining pure black poplar occurrences …