Fig. 2From: The importance of harvest residue and fertiliser on productivity of Pinus patula across various sites in their first, second and third rotations, at Usutu SwazilandMean volume increment across all treatments over the three sites (A9, C9, D5) in the first (F1R) and second rotation (F2R) areas established in 1971, and the second (S2R) and third rotation (S3R) areas established in 1991Back to article page