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THE STUDY OF PLANT COMMUNITIES 



137. Kbnoybr, L. A. A study of Raun- 

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341-349, 1927. 



138. . Ecological notes on Kalamazoo 



County, Michigan based on the 

 original land survey. Paps. Mich. 

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 217, 1930. 



139 • Forest distribution in south- 

 western Michigan as interpreted 

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 32). Paps. Mich. Acad. Sci., Arts and 

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140. Kimball, H. H. Intensity of solar ra- 



diation at the suface of the earth and 

 its variations with latitude, altitude, 

 season and time of the day. Mo. 

 Weath. Rev., 63: 1-4, 1935. 



141. Kincer, J. B. Climate and weather data 



for the United States. In Climate and 

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142. Kittredgb, J. Forests and water as- 



pects which have received little at- 

 tention. Jour. For., 34: 417-419, 

 1936. 



143. Klages, K. H. W. Ecological Crop Geog- 



raphy. New York: The Macmillan 

 ©Company, 1942. 615 pp. 

 Klyver, F. D. Major plant communi- 

 ties in a transect of the Sierra Nevada 

 mountains of California. Ecology, 12: 



1-17, 1931. 



145. Korstian, C. F., and Brush, W. D. 

 Southern white cedar. U. S. Dept. 

 Agr. Tech. Bull, 251, 1931. 



146. , and Coile, T. S. Plant competi- 

 tion in forest stands. Duke Univ. 

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PP- . .. 



147. Kramer, P.J. Photoperiodic stimu- 

 lation of growth by artificial light as 

 a cause of winter killing. Plant Phy- 

 siol., 12: 881-883, 1936. 



148. . Species differences with respect 



to water absorption at low tempera- 

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 1942. 



149 . Soil moisture in relation to plant 



growth. Bot. Rev., 10: 525-559, 1944. 



150. Kurz, H. and Demaree, D. Cypress 



buttresses and knees in relation to 

 water and air. Ecology, 15: 36-41, 

 1934. 



151. Larson, L. T., and Woodbury, T. D. 



Sugar pine. U. S. Dept. Agr. Bull. 

 426, 1916. 40 pp. 



152. Lawrence, D. B. Some features of the 



vegetation of the Columbia River 

 Gorge with special reference to 

 asymmetry in trees. Ecol. Monog., 

 9: 217-257, 1939. 



153. Leopold, A. Conservation economics. 



Jour. Forest. 32: 537-544, 1934. 



154. Lewis, F. J. The vegetation of Alberta. 



II. The swamp moor and bog for- 

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155. Lewis, I. F. The Vegetation of Shackle- 



ford Bank, Carteret County, North 

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 Pap. 46, 1918. 



156. Livingston, B. E. A single index to 



represent both moisture and tem- 

 perature conditions as related to 

 plant growth. Physiol. Research no. 

 9: 421-440, 1916. 



157. . Atmometers of porous porce- 

 lain and paper, their use in physio- 

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 1935. 



158. , and Koketsu, R. The water- 

 supplying power of the soil as re- 

 lated to the wilting of plants. Soil 

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159. , and Shreve, F. The Distribution 



of Vegetation in the United States, as re- 

 lated to Climatic Conditions. Carnegie 

 Inst. Wash. Publ. 284, 1921. 590 pp. 



160. Lutz, H. J. Effect of cattle grazing on 

 vegetation of a virgin forest in north- 

 western Pennsylvania. Jour. Agr. Res., 

 41: 561-570, 1930. 



161. . Origin of white pine in virgin 



forest stands of northwestern Penn- 

 sylvania. Ecology, 16: 252-256, 1935. 



162. . Determinations of certain physi- 

 cal properties of forest soils: I. 

 Methods utilizing samples collected 

 in metal cylinders. Soil Sci., 57: 475- 

 487, 1944. 



163. . Determination of certain phy- 

 sical properties of forest soils: II. 

 Methods utilizing loose samples 

 collected from pits. Soil Sci., 58: 325- 

 333, 1944. 



164. Lyon, C Tree ring width as an index 



of physiological dryness in New 

 England. Ecology, 17: 457-478, 1936. 



165. MacKinney, A. L. Effects of forest 



litter on soil temperature and soil 

 freezing in autumn and winter. 

 Ecology, 10: 312-322, 1929- 



166. McCubbin, W. A. Preventing plant 



disease introduction. Bot. Rev., 12: 

 101-139, 1946. 



167. McDougall, W. B. Plant Ecology. 



Philadelphia: Lea & Febiger, 1931, 

 2nd ed. 338 pp. 



168. , and Jacobs, M. C. Tree mycor- 



hizas from the central Rocky Moun- 

 tain region. Am. Jour. Bot., 14: 258- 

 266, 1927. 



