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biological decomposition of some types of litter from north american 

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INVESTIGATIONS OF THE SIGNIFICANCE OF TREE MYCORRHIZA ; AN ECOLOGICAL- 

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173 pp., illus. Ann Arbor, Mich. 1930. 



Munns, E. N. (3081) 



a biological soil problem. U. S. Dept. Agr., Forest Worker 4 (2) : 17-18. 

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Pessin, L. J. (3082) 



MYcoRRHizA of southern pines. Ecology 9 : 28-33, illus. 1928. 



Taylor, M. W. (3083) 



preliminary report of the vertical distribution of fusarium in soil. 

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Tragardh, Ivar. (3084) 



studies in the fauna of the soil in Swedish forests. 4th Internal!. Cong. 

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Waokerman, A. E. (3085) 



earthworms in the forest. Jour. Forestry 24 : 454-455. 1926. 



Waksman, S. A., Jenney, F. G., and Stevens, K. R. (3086) 



the role of microorganisms in the transformation of organic matter in 

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ROOT DEVELOPMENT AND RELATIONS 



Aaltonen, V. T. (3087) 



on the space arrangement of trees and root competition. Jour. Forestry 

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Cannon, W. A. (3088) 



experimental investigations on roots. Carnegie Inst. Wash. Yearbook 22 : 

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influence of temperature of the soil on the relation of roots to oxygen. 



Science 58: 331-332. 1923. 



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some relations between root characters, ground water and species dis- 

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Cheyney, E. G. (3091) 



THE EFFECT OF POSITION OF ROOTS UPON THE GROWTH OF PLANTED TREES. Jour. 



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A STUDY OF THE ROOTS IN A SQUARE YARD OF JACK PINE FOREST. JOUI*. Forestry 



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AERATION AND AIR-CONTENT ; THE ROLE OF OXYGEN IN ROOT ACTIVITY. 183 pp. 



Washington, D. C. 1921. (Carnegie Inst. Wash. Pub. 315.) 



Forbes, R. D. ' (3094) 



the roots of trees. Amer. Forests and Forest Life 31: 201-204, 234-236, 

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Gager, C. S. (3095) 



aeration of tree roots: theory. Natl. Shade Tree Conf. Proc 5: 26-27. 

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Gemmer, E. W. (3096) 



facts about the root system of a longleaf pine. Naval Stores Rev. 38 (3) : 

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