1. Ågren G, Axelsson B, Flower-Ellis J G K, Linder S, Persson H, Staaf H and Troeng E 1980 Annual carbon budget for a young Scots pine. Ecol. Bull. (Stockholm) 32, 307–313.
2. Aronsson A, Elowson S and Ingestad T 1977 Elimination of water and mineral nutrition as limiting factors in a young Scots pine stand. I. Experimental design and some preliminary results. Swed. Conif. For. Proj. Techn. Rep. 10, 38 pp.
3. Aronsson A and Elowson S 1980 Effects of irrigation and fertilization on the mineral nutrients in Scots pine needles. Ecol. Bull. (Stockholm) 32, 219–228.
4. Auten J T 1945 Response of shortleaf and pitch pines to soil amendments and fertilizers in newly established nurseries in the central states. J. Agric. Res. 70, 405–426.
5. Axelsson B and Bråkenhielm S 1980 Investigation sites of the Swedish Coniferous Forest Project—biological and physiographical features. Ecol. Bull. (Stockholm) 32, 25–64.