1. Root/shoot ratios as a balance between nitrogen productivity and photosynthesis;Ågren;Plant Cell Environ.,1987
2. Relations between tree height and diameter, productivity and allocation of growth in Scots pine (Pinus sylvestris L.) sample tree material;Albrekton,1985
3. Effects of N fertilization on populations of fine roots and mycorrhizas in spruce humus;Alexander;Plant and Soil,1983
4. The Principles of Forest Yield Study;Assmann,1970
5. Changes in carbon allocation patterns in spruce and pine trees following irrigation and fertilization;Axelsson;Tree Physiol,1986