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Willow shows great promise as a biomass crop and is now used worldwide. However, willow is a nutrient and water demanding plant that often requires the use of nitrogen (N) fertilizer to maximize growth on poor soils. The intercropping of Salix miyabeana with the atmospheric N2-fixing Caragana arborescens on poor soils of the Canadian Prairies could provide a portion of the N demand of the willow....