Comparison of two seedlings, one with fine root system (ht.19.5cm., diam.4.7cm) and coarse roots (ht.18.5cm., diam5.3cm). Black spruce, 3+0, seedling roots.
Conventional 11/2 seedling transplanted in July'72, photo june'73 compare with slide #310 & 311 All in same field (O). Black spruce, 1+1, transplant stock.