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Control plot no fertilizer addition to Douglas fir.
Control plot no fertilizer addition to Douglas fir. Razès.
Norway spruce planted 1967, 6 years.
Norway spruce planted 1967, 6 years. Person is Professor George Switzer (Mississippi State University). Razès.
Douglas plot with N, P, K and Cu added.
Douglas plot with N, P, K and Cu added. c.f. slide 989 and note the difference in growth and colour. Razès.
Nitrogen deficiency in Norway spruce planted 1967
Nitrogen deficiency in Norway spruce planted 1967, 6 years. Razès.
Copper deficiency in Douglas fir.
Copper deficiency in Douglas fir. n.b. crook in stem. Razès.
Copper deficiency in Douglas fir.
Copper deficiency in Douglas fir. n.b. crook in stem which is a symptom of Cu deficiency. Razès.
Copper deficiency in Douglas fir.
Copper deficiency in Douglas fir. n.b. crook in stem which is a symptom of Cu deficiency. Razès.
Heathland, that has been cultivated then planted with Douglas fir which now has a copper deficiency.
Oil profile-sol brun acide. Heathland, that has been cultivated then planted with Douglas fir which now has a copper deficiency. Razès.
Root system of 8 year old Douglas fir.
Root system of 8 year old Douglas fir. n.b. how limited the system is. Dussac, Dordogne.
Root system of 8 year old Douglas fir.
Root system of 8 year old Douglas fir. n.b. how limited the system is. Dussac, Dordogne.