98 MISC. PUBLICATION 2 81, U. S. DEPT. OF AGRICULTURE 



Sweet, A. T., and Hockensmith, R. D. (1794) 



CHARACTERISTICS INDICATING DIFFERENCES IN MATURITY IN SOILS OF THE 



semiarid regions. Amer. Soil Survey Assoc. Bull. 15: 34-38. 1934. 

 and Potjlson, E. N. (1795) 



SOIL SURVEY OF THE FORT SUMNER AREA, NEW MEXICO. U. S. Bur. Chem. and 



Soils, Soil Survey Kept. (1930) 1, 17 pp., iUus. 1930. 

 and Spencer, J. N. (1796) 



SOIL SURVEY OF THE FORT COLLINS AREA, COLORADO. U. S. Bur. Chem. and 



Soils, Soil Survey Rept. 27, 29 pp., illus. 1927. 

 Taylor, W. P. (1797) 



ANIMALS A POTENT FACTOR IN SOIL FORMATION. Ecology 11: 787-788. 1930. 



Thorne, C. E. (1798) 



THE MAINTENANCE OF SOIL FERTILITY. 332 pp., illus. New York. 1930. 



Thorp, J., Fitzpatrick, E. G., Dunnewald, T. J., and Gorsuch, F. T. (1799) 

 soil survey of the basin area, Wyoming. U. S. Bur. Chem. and Soils, 

 Soil Survey Rept. 27, 8 pp., illus. 1928. 



Throckmorton, R. I. (1800) 



Kansas soils and soil map. Kans. State Bd. Agr. Bien. Rept. 1931-32: 

 91-102, illus. 1933. 



Torgerson, E. F., and Glassey, T. W. (1801) 



soil survey of marion county, Oregon. U. S. Bur. Chem. and Soils, 

 Soil Survey Rept. 32, 46 pp., illus. 1927. 



Weir, W. W. (1802) 



SOIL SCIENCE, ITS PRINCIPLES AND PRACTICE . . . 615 pp. Chicago. 1936. 



Welton, F. A., and Wilson, J. D. (1803) 



WATER-SUPPLYING POWER OF THE SOIL UNDER DIFFERENT SPECIES OF GRASS 

 AND WITH DIFFERENT RATES OF WATER APPLICATION. Plant Physiol. 6: 



485-493, illus. 1931. 

 Whitfield, C. J. (1804) 



ECOLOGICAL ASPECTS OF TRANSPIRATION II. PIKE'S PEAK AND SANTA BARBARA 



regions: edaphic and climatic aspects. Bot. Gaz. 94: 183-196, illus. 

 1932. 



Whitney, M. (1805) 



soils of the united states, based upon the work of the bureau of 



soils to January l, 1908. U. S. Bur. Soils Bull. 55, 243 pp., illus. 1909. 



and Means, T. H. (1806) 



alkali lands. U. S. Dept. Agr. Farmers' Bull. 88, 22 pp., illus. 1899. 



Wiggin, W. W., and Gourley, J. H. (1807) 



STUDIES ON THE REACTIONS OF GREENHOUSE SOILS TO THE GROWTH OF PLANTS. 



Ohio Agr. Expt. Sta. Bull. 484, 30 pp., illus. 1931. 

 Williams, O. B. (1808) 



A QUANTITATIVE AND QUALITATIVE DETERMINATION OF THE BACTERIAL FLORA 

 OF SOME REPRESENTATIVE VIRGIN AND CULTIVATED TEXAS SOILS. Soi 



Sci. 19: 163-168. 1925. 

 Youngs, F. O., Glassey, T. W., Poulson, E. N., and Isaacson, M. R. (1809) 



SOIL SURVEY OF THE PARADISE-VERDE AREA, ARIZONA. U. S. Bur. Chem. 



and Soils, Soil Survey Rept. 6, 22 pp., iUus. 1928. 

 Harper, W. G., Glassey, T. W., and Isaacson, M. R. (1810) 



SOIL SURVEY OF THE GILA BEND AREA, ARIZONA. U. S. Bur. Chem. and Soils, 



Soil Survey Rept. 4, 22 pp., illus. 1928. 



Sweet, A. T., Strahorn, A. T., Glassey, T. W., and Poulson, 



E. N. (1811) 



soil survey of the tucson area, Arizona. U. S. Bur. Chem. and Soils 

 Rept. (1931) 19, 60 pp., illus. 1936. 



See also Bates (1576), Bennett (6561), Brav (158-5), Cooper and others 

 (972), Hilgard (1627), Jenny (1917), Morrow (2227), Sampson (2567), 

 Shantz and others (746), Sinclair and others (2240), Sprague (2583), and 

 Wahlenberg (6320). 



