Sol brun acide near Alsea; closeup of A to show concretionary 'shot' structure; same profile as slide #31. Inceptisol, P, S, F, D.

Windthrow mound in Great Lakes-St. Lawrence forest at Dorset; under maple/beech which had white pine and fire history. Spodosol, C, WN, D.

Windthrow same as slide #33, but from angle to show buried Ae and B of profile. Spodosol, P, C, WN, D.

Windthrow as in slides #33, 34 and 36; n.b. depth of buried Ae and H and the inversion; yellow/red 'firing' of the iron in B where a root burned (Pine?). Spodosol, P, C, WN, D.

Profile under the fallen trunk of the windthrown pine; n.b disturbance to the right; also slides numbers 33, 34, 35. Spodosol, P, C, WN, D.

Digging out a soil pit by hand; KAA and Ken Reese doing their thing at the Swastika Nursery where there is to be more clearing of jack pine to enlarge the nursery. Spodosol, P, C, F, D.

Digging the soil pit cf. slide #36, technology to the rescue! At Swastika nursery. Spodosol, P, C, F, D.

Nitrogen-fixing nodules on Alnus; actinomycetes the organisms. Spodosol, HF, BSY.

Cluster of nodules on Alnus; N-fixing by Actinomycetes. Spodosol, HF, BSY.

Nodules on black locust (robinia pseudoacacia) with rhizobium bacteria nitrogen-fixing; see slides #42 and 43. Alfisol, HF, BSY.