BIBLIOGRAPHY 659 



SHANTZ, H. L. 



1911. Natural Vegetation as an Indicator of the Capabilities 

 of Land for Crop Production in the Great Plains Area. 

 U. S. Bur. PI. Ind. Bui. 201. 



SHIVE, J. W. AND LIVINGSTON, B. E. 



1914. The Relation of Atmospheric Evaporating Power to 

 Soil Moisture Content of Permanent Wilting in Plants. 

 PL World XVII., 81-121. 

 SHREVE, FORREST. 



1914a. Rainfall as a Determinant of Soil Moisture. PL 



World XVII., 9-26. 



1914b. The R61e of Winter Temperatures in Determining 

 the Distribution of Plants. Am. Jour. Bot. I., 194-202. 

 SOULE, A. M. AND VANATTER, P. O. 



1903. Influence of Climate and Soil on the Composition and 

 Milling Qualities of Winter Wheat. Tenn. Agr. Expt. 

 Sta. Bui. XVI., No. 4. 

 STENSTROM, K. 



1895. ttber das Vokommen derselben Arten in verschie- 

 denen Klimaten, an verschiedenen Standorten mit be- 

 sondere Beriicksichtigung der Xerophyl ausgebildeten 

 Pflanzen. Flora LXXX., 117. 

 STUPART, R. F. 



1905. The Canadian Climate. Rep. Eighth Int. Geogr. 



Cong. 1904, 294-307. 



TANFILIEV, G. 



1894. Die Waldgrenzen in Siidrussland. Petrograd. 



1897. Physiko-Geographicheskiya Oblasti Evropeiskol Ros- 

 sii. (Physico-Geographic Districts of European Russia.) 

 Petrograd. 



1898. Pflanzengeographische Studien im Steppengebiete. 

 Petrograd. 



1905. Die Siidrussischen Steppen. Result. Sci. Congr. 



Internat. Bot. Vienne. 

 THATCHER, R. W. 



1912. The Relation of Protein Content of Wheat to Rain- 

 fall. Proc. Am. Soc. Agron. III., 42. 



1913. The Chemical Composition of Wheat. Bui. III., 

 Wash. Agr. Expt. Sta. Investigations from 1906 to 1912 

 inclusive. 



THORNBER, J. 



1901. Studies in the Vegetation of the State: I. The 

 Prairie Grass Formation in Region I. Bot. Survey of 

 Nebr. V., Lincoln, Nebr. 



