Copper deficiency in Douglas fir. n.b. crook in stem which is a symptom of Cu deficiency. Razès.

Copper deficiency in Douglas fir. n.b. crook in stem which is a symptom of Cu deficiency. Razès.

Copper deficiency in Douglas fir. n.b. crook in stem. Razès.

Nitrogen deficiency in Norway spruce planted 1967, 6 years. Razès.

Douglas plot with N, P, K and Cu added. c.f. slide 989 and note the difference in growth and colour. Razès.

Norway spruce planted 1967, 6 years. Person is Professor George Switzer (Mississippi State University). Razès.

Black and white photograph of a gymnastic display with J. Kowalchuk and Lillian Lavallee

Control plot no fertilizer addition to Douglas fir. Razès.

Norway spruce, 6 years from planting. Haute-Vienne, Limousin.

Plantation of Douglas fir, general view and foresters taking pictures. Razès.