(a)
(b)
Figure 6: Comparison of 2012 results with 2005 and 2007. (a) Mean for individual plots (0–10 cm mean plus 1 SE) for each sample year. Control = A-3, B-9; fertilizer-grass = A-2, B-4, H-10; grass-birch-willow = A-8, B-5, H-8; lupine = B-6, H-9. (b) Mean for plots averaged by treatment. C = control, G = fertilizer-grass; GBW = grass-birch-willow; L = lupine.