Brandtberg, Per-Olov; Wang, Pei; Olsson, Bengt A. et. al 2021 Effects of wood ash, green residues and N-free fertiliser on naturally regenerated birch and field vegetation in a young Norway spruce stand in SW Sweden Research article (Peer reviewed) DOI:10.1080/02827581.2021.1936154
Wang, Pei; Olsson, Bengt; Arvidsson, Helen et. al 2010 Short-term effects of nutrient compensation following whole-tree harvesting on soil and soil water chemistry in a young Norway spruce stand Research article (Peer reviewed) DOI:10.1007/s11104-010-0484-1
Arvidsson, Helen 2001 Wood ash application in spruce stands : effects on ground vegetation, tree nutrient status and soil chemistry Doctoral thesis