RANGE BIBLIOGRAPHY 107 



Stewart, G. R. (1956) 



A STUDY OF SOIL CHANGES ASSOCIATED WITH THE TRANSITION FROM FERTILE 

 HARDWOOD FOREST LAND TO PASTURE TYPES OF DECREASING FERTILITY. 



Ecol. Monog. 3: 109-145, illus. 1933. 



Stewart, L. C, Sackett, W. G., Robertson, D. W., and Kezer, A. (1957) 

 A comparison of the soil-plaque method with the neubauer and hoffer 

 cornstalk methods for determining mineral soil deficiencies. 

 Colo. Agr. Expt. Sta. Bull. 390, 59 pp., illus. 1932. 



Taylor, W. A. (1958) 



the abc of hydrogen ion control. Ed. 4, 121 pp., illus. Baltimore. 

 1928. 



Thom, C, and Smith, N. R. (1959) 



THE RELATION OF SOIL ACIDITY TO THE DECOMPOSITION OF ORGANIC RESIDUES. 



Jour. Amer. Soc. Agron. 25: 392-396. 1933. 

 Tidmore, J. W. (1960) 



THE PHOSPHORUS CONTENT OF THE SOIL SOLUTION AND ITS RELATION TO PLANT 



growth. Jour. Amer. Soc. Agron. 22: 481-488. 1930. 

 Truog, E. (1961) 



THE CAUSE AND NATURE OF SOIL ACIDITY, WITH SPECIAL REFERENCE TO COL- 

 LOIDS and adsorption. Jour. Phys. Chem. 20: 457-484. 1916. 



• ■ • (1962) 



soil acidity. Soil Sci. 5: 169-195. 1918. 



Waksman, S. A., and Iyer, K. R. N. (1963) 



CONTRIBUTION TO OUR KNOWLEDGE OF THE CHEMICAL NATURE AND ORIGIN OF 



humus. Soil Sci. 34: 43-79, illus. 1932. 

 Wherry, E. T. (1964) 



SOIL ACIDITY AND A FIELD METHOD FOR ITS MEASUREMENT. Ecology ll 



160-173, illus. 1920. 



• ■ ■ (1965) 



SOIL ACIDITY, ITS NATURE, MEASUREMENT, AND RELATION TO PLANT DISTRIBU- 

 TION. Smithsn. Inst. Ann. Rept. 1922: 247-268, illus. 1922. 



Wilcox, L. V. (1966) 



DETERMINATION OF BORON IN NATURAL WATERS AND PLANT MATERIALS, 



modification of the chapin method. Indus, and Engin. Chem., Analyt. 

 Ed. 2: 358-361, illus. 1930. 



Williams, K. T., and Byers, H. G. - (1967) 



occurrence of selenium in pyrites. Indus, and Engin. Chem., Analyt. 

 Ed. 6: 296-297. 1934. 



Willis, W. EL, and Walker, R. H.- (1968) 



ANAEROBIC NITROGEN FIXATION IN SOME IOWA SOILS. Iowa Acad. Sci. 



Proc. 38: 293-298. 1931-32. 



See also Cannon {2480), Cook (971), Fraps and others (2326), Hilgard 

 (7049), Hockensmith and others (1972, 2358), Kearney (2527), Kearney and 

 others (2257, 2257- A), Lyon and others (2544), Murphy and others (6764), 

 Nelson (884), Sackett and others (2411), Smith (920), Snyder (2429), and 

 Wherry (2271). 



Topographic Factors 



Publications treating of the effects, and the material related thereto, which 

 topography in general, altitude, slope, and exposure have on range plants and 

 plant groups. 

 Cottle, H. J (1969) 



VEGETATION ON NORTH AND SOUTH SLOPES OF MOUNTAINS IN SOUTHWESTERN 



texas. Ecology 13: 121-134, illus. 1932. 

 Fuller, G. D. (1970) 



TOPOGRAPHIC RELIEF AS A FACTOR IN PLANT SUCCESSION. 111. State Acad. Sci. 



Trans. 13: 243-247. 1920. 

 Gates, F. C. (1971) 



EVAPORATION IN VEGETATION AT DIFFERENT HEIGHTS. Amer. Jour. Bot. 13: 



167-178. 1926. 



