152
J. ROGER BRAY AND EVILLE GORHAM
found that in English forest plantations Gymnosperms may be several
times as productive as Angiosperms on the same sites. In a general
comparison over wide areas, however, the tendency of Angiosperms
to occur on better soils than Gymnosperms may lessen the differences
in production brought about by differences in canopy weight and
duration.
REFEBENCES
Aaltonen, V. T. (1948). “Boden und Wald”, 457 pp. Berlin and Hamburg:
Paul Parey.
Alway, F. J., Methley, W. J. and Younge, 0. R. (1933). Soil Sci. 36, 399-407.
Distribution of volatile matter, lime and nitrogen among litter, duff, and
leaf mold under different forest types.
Alway, F. J. and Zon, R. (1930). J. For. 28, 715-727. Quantity and nutrient
contents of pine leaf litter.
Andersson, S. 0. and Enander, J. (1948). Svenska SkogsvF&en. Tidakr. 46,
265-270. Om produktionen av lovforna och dennas sammansiittning i ett
mellansvenskt aspbesthd.
AndrB, P. (1947). Svenska SkogmForen. Tidskr. 45, 122-131. Bamkens och
mossornas fornaproduktion i ett barrskogsbest&nd.
Anonymous (1932). Bull. N.H. agric. Exp. Sta. no. 262. Formation of forest
soils: rate of deposition of litter.
Anonymous (1960). Rep. cent. St. For. Exp. Sta., p. 12.
Auten. J. T. (1941). Tech. Notes cent. St. For. Exp. Sta. 32, 9 pp. Black locust,
pines and sassafras as builders of forest soil.
Bartholomew, W. V., Meyer, J. and Laudelot, H. (1953). Publ. INEAC Ser. Sci.,
57, 27 pp. Mineral nutrient immobilization under forest and grass fallow in
the Yangambi (Belgian Congo) region.
Becking, J. H. (1962). I n “Die Stoffproduktion der Pflanzendecke” (ed. H. Lieth),
pp. 128-131. Stuttgart: Gustav Fischer Verlag. Ein Vergleich der Holzproduktion im gemiissigten und im tropischen Klima.
Black, J. N. (1956). Arch.. Met. Wien, Ser. B, 7 , 165-189. The distribution of
solar radiation over the earth’s surface.
Blow, F. E. (1955). J. For. 53, 190-195. Quantity and hydrologic characteristics
of litter under upland oak forests in emtern Tennessee.
Bocock, K. L., Gilbert, O., Capstick, C. K., Twinn, D. C., Waid, J. S. and Woodman, M. J. (1960). J. Soil Sci. 11, 1-9. Changes in leaf litter when placed on
the surface of soils with contrasting humus types.
Bohrnerle, K. (1906). “Die Streuvemuche im grossen Fohrenwalde”. 22 pp.
Vienna: W. Frick.
Bonnevie-Svendsen, C. and Gjems, 0. (1957). Medd. Norske Skogsfors~ksv. 48,
111-174. Amount and chemical composition of the litter from larch, beech,
Norway spruce and Scots pine stands and its effect on the soil.
Bornebusch, C. H. (1937). pOr8tl. Fors0bv. Danm. 14, 173-176. Iagttagelser
over rpldgranens naalefald.
Boysen-Jensen, P. (1930). Forstl. Forsoksv. Danm. 10, 365-391. Undersogelser
over Stofproduktionen i yngre Bevoksninger af Ask og Bog. 11.
Brauns, F. E. and Brauns, D. A. (1960). “The Chemistry of Lignin”, Suppl.
Vol., 804 pp. New York and London: Academic Press.
J. ROGER BRAY AND EVILLE GORHAM
found that in English forest plantations Gymnosperms may be several
times as productive as Angiosperms on the same sites. In a general
comparison over wide areas, however, the tendency of Angiosperms
to occur on better soils than Gymnosperms may lessen the differences
in production brought about by differences in canopy weight and
duration.
REFEBENCES
Aaltonen, V. T. (1948). “Boden und Wald”, 457 pp. Berlin and Hamburg:
Paul Parey.
Alway, F. J., Methley, W. J. and Younge, 0. R. (1933). Soil Sci. 36, 399-407.
Distribution of volatile matter, lime and nitrogen among litter, duff, and
leaf mold under different forest types.
Alway, F. J. and Zon, R. (1930). J. For. 28, 715-727. Quantity and nutrient
contents of pine leaf litter.
Andersson, S. 0. and Enander, J. (1948). Svenska SkogsvF&en. Tidakr. 46,
265-270. Om produktionen av lovforna och dennas sammansiittning i ett
mellansvenskt aspbesthd.
AndrB, P. (1947). Svenska SkogmForen. Tidskr. 45, 122-131. Bamkens och
mossornas fornaproduktion i ett barrskogsbest&nd.
Anonymous (1932). Bull. N.H. agric. Exp. Sta. no. 262. Formation of forest
soils: rate of deposition of litter.
Anonymous (1960). Rep. cent. St. For. Exp. Sta., p. 12.
Auten. J. T. (1941). Tech. Notes cent. St. For. Exp. Sta. 32, 9 pp. Black locust,
pines and sassafras as builders of forest soil.
Bartholomew, W. V., Meyer, J. and Laudelot, H. (1953). Publ. INEAC Ser. Sci.,
57, 27 pp. Mineral nutrient immobilization under forest and grass fallow in
the Yangambi (Belgian Congo) region.
Becking, J. H. (1962). I n “Die Stoffproduktion der Pflanzendecke” (ed. H. Lieth),
pp. 128-131. Stuttgart: Gustav Fischer Verlag. Ein Vergleich der Holzproduktion im gemiissigten und im tropischen Klima.
Black, J. N. (1956). Arch.. Met. Wien, Ser. B, 7 , 165-189. The distribution of
solar radiation over the earth’s surface.
Blow, F. E. (1955). J. For. 53, 190-195. Quantity and hydrologic characteristics
of litter under upland oak forests in emtern Tennessee.
Bocock, K. L., Gilbert, O., Capstick, C. K., Twinn, D. C., Waid, J. S. and Woodman, M. J. (1960). J. Soil Sci. 11, 1-9. Changes in leaf litter when placed on
the surface of soils with contrasting humus types.
Bohrnerle, K. (1906). “Die Streuvemuche im grossen Fohrenwalde”. 22 pp.
Vienna: W. Frick.
Bonnevie-Svendsen, C. and Gjems, 0. (1957). Medd. Norske Skogsfors~ksv. 48,
111-174. Amount and chemical composition of the litter from larch, beech,
Norway spruce and Scots pine stands and its effect on the soil.
Bornebusch, C. H. (1937). pOr8tl. Fors0bv. Danm. 14, 173-176. Iagttagelser
over rpldgranens naalefald.
Boysen-Jensen, P. (1930). Forstl. Forsoksv. Danm. 10, 365-391. Undersogelser
over Stofproduktionen i yngre Bevoksninger af Ask og Bog. 11.
Brauns, F. E. and Brauns, D. A. (1960). “The Chemistry of Lignin”, Suppl.
Vol., 804 pp. New York and London: Academic Press.