You can followers, this similary article. Nord-Larsen, Thomas, Lisbeth Sevel, and Karsten Raulund-Rasmussen. "Commercially Grown Short Rotation Coppice Willow in Denmark: Biomass Production and Factors Affecting Production." BioEnergy Research (2014): 1-15.
Toivonen, R. M., & Tahvanainen, L. J. (1998). Profitability of willow cultivation for energy production in Finland. Biomass and Bioenergy, 15(1), 27-37
Hi! We published a paper with potentials from Finland derived from Swedish plantations:
Mola-Yudego, Blas (2010). Regional potential yields of short rotation willow plantations on agricultural land in Northern Europe. Silva Fennica, 44, 1.