66 



LITERATURE CITED. 



(1) Alway, F. J., and Blish, M. J. 



1916. The loess soils of the Nebraska portion of the transition region: 

 IT. Humus, humus-nitrogen and color. Jn Soil Sci. v. i, no. 3, 

 p. 239-238, 4 fig. 



(2) Alway, F. J., and McDole, G. R. 



1916. The loess soils of the Nebraska portion of the transition region: 

 I. Hygroscopicity, nitrogen, and organic carbon. lu Soil Sci.. 

 1'. I, no. 3, p. 197-238. 2 fig; 3 Pl- 



(3) Alway, F. J., and Rost, C. O. 



1916. The vertical distribution of phosphorus in the surface soil of 

 prairies. lit Soil Sci., v. 2, no. 5, p. 493-49/. 



(4) Alway, F. J., and Rost, CO. 



1916. The loess soils of the Nebraska portion of the transition region: 

 IV. Mechanical composition and inorganic constituents, hi 

 Soil Sci., r. i, no. 5, p. 405-436. 2 fig. 



(5) Alway. F. J., and Russel, J. C. 



1916. Use of the moisture equivalent for the indirect determination of 

 the hygroscopic coefficient, fn. Jour. Agr. Research, v. 6, no. 

 22, p.'S33-846. 



(6) Briggs, L. J., and McLane. J. W. 



1907. The moisture equivalents of soils. U. S. Dept. Agr. Bur. Soils 

 Bui. 45, 23 p., 1 fig., 1 pi. 



(7) Briggs, L. J., and McLane. J. W. 



1910. Moisture equivalent determinations and their application. Jn 



Proc. Anicr. Soc. Agron., v. 2, p. 138-147. 6 pi. 



(8) Briggs, L. J., and Shantz, H. L. 



1912. The wilting coefficient for different plants and its indirect determi- 

 nation. U. S. Dept. Agr. Bur. Plant Indus. Bui. 230, 83 p.. 9 f^g.. 

 2 pi. 



(9) Brown, P. E. 



1914. The fertility in Iowa soils. Iowa Agr. Exp. Sta. Bui. 150, p. 89-152. 



(10) Buchanan, H. 



1807. Tourney from Madras through Mvsore. Canara, and Malabar. 

 Vol. IJ. 



(11) Burke. R. T. A., and Kolbe. L. A. 



1911. Soil survey of Rice County, Minnesota. Advance sheets from 



field operations, 1909, 39 p., 1 fig., 1 map. 



(12) Bureau of Soils. 



1013. Soils of the United States. U. S. Dept. Agr. Bur. Soils Bui. 96. 

 p. 791, 13 fig.. 2 pi. 



(13) Chamberlin, T. C, and Salisbury, R. D. 



1907. Geology, vol. Ill, 624 p., 576 figs. Holt & Co., New York. 



(14) DOKUTSCHAJEW, V. V. 



1883. Russian chermozem. St. Petersburg. 



