Fig. 4From: The importance of harvest residue and fertiliser on productivity of Pinus patula across various sites in their first, second and third rotations, at Usutu SwazilandRelative response compared to the control treatment over time for site preparation and fertilisation in the second rotation (F2R) established in 1971 (dotted lines) and third rotation (S3R) on same three sites established in 1991 (solid lines)Back to article page