Page and Bod man 165 



32. Day, P. R. "The moisture potential of soils by the cryoscopic method." 

 Ph.D. Diss., Berkeley, California (1941). 



33. Elliot, G. R. B., Ecology, 5:175 (1924). 



34. Erickson, L. E., Am. J. Botany, 33:551 (1946). 



35. Gilbert, S. F., and Shive, J. W., Soil Sri., 53:143 (1942). 



36. Gorbunov, N. E., Khimizatsiya Sotsialist. Zemledeliya, No. 2-3:82 



(i93 6 )- 



37. Greacen, E. L. "Applicability of Boyd's exchange equations to cation 

 exchange in soil columns." Ph.D. Diss., University of California, Berke- 

 ley, California (1949). 



38. Hoagland, D. R., and Martin, J. C, Soil Sci., 36:1 (1933). 



39. Hoagland, D. R., and Broyer, T. C, Plant Physiol., 11:471 (1936). 



40. Hoagland, D. R., and Broyer, T. C, /. Gen. Physiol., 25:865 (1942). 



41. Hoagland, D. R., Lectures on the inorganic nutrition of plants 

 (Chronica Botanica Co., 1944). 



42. Hoffer, G. N., Better Crops With Plant Food, 29, no. 1:6 (1945). 



43. Hosking, J. S., /. Council Sci. lnd. Research {Australia), 21:38 (1948). 



44. Knight, R. C, Ann. Botany, 38:305 (1924). 



45. Krause, M., Landw. Jahrb. 73:603 (1931). 



46. Lawton, Kirk, Soil Sci. Soc. Am. Proc, 10:263 (1945). 



47. Loehwing, W. F., Proc. Iowa Acad. Sci., 38:71 (1931). 



48. , Plant Physiol., 9:567 (1934). 



49. Martin, J. C, Overstreet, R., and Hoagland, D. R., Soil Sci. Soc. 

 Am. Proc, 10:94 ( I 945)- 



50. Metzger, W. H., and Hide, }. C, /. Am. Soc. Agron., 30:833 (1938). 



51. McGeorge, W. T., and Breazeale, J. F., Ariz. Agr. Expt. Sta. Tech. 

 Bull. 72 (1938). 



52. Page, }. B., Soil Sri. Soc. Am. Proc, 12:31 (1947). 



53. , and Willard, C. J., Soil Sci. Soc. Am. Proc, 11:81 (1946). 



54. , and Willard, C. )., Soil Sci. Soc. Am. Proc, 11:77 ( I 94^)* 



55. Parker, F. W., Soil Sci., 20:39 (1925). 



56. Pepkowitz, L. P., and Shive, J. W., Soil Sci., 57:143 (1944). 



57. Richards, L. A., and Weaver, L. R., Soil Sci., 56:331 (1943). 



58. Richards, L. A., Soil Sci., 68:95 ( I 949)- 



59. Rubin, J. "The influence of externally applied stresses upon the struc- 

 ture of confined soil material." Ph.D. Diss., Berkeley, California (1949). 



60. Rubashov, A. B., (Russian). Pochvovedenie, No. 4 (April 1940). 



61. , (Russian), Pochvovedenie, No. 3:130 (March 1949). 



62. Schuylenborgh, J. van, "A study on soil structure." Ph.D. Diss., 

 Wageningen (1947). 



63. Smith, F. W., and Cook, R. L., Soil Sci. Soc. Am. Proc, 11:403 (1946). 



64. Snow, L. M., Botan. Gaz., 40:12 (1905). 



