EFFECT OF DR\1NG SOILS ON WATER-SOLUBLE CONSTITUENTS 213 



(102) Warington, R. 1882 On tlie determination of nitric acid in soils. In Jour. Chem. 



Soc. (London), Trans., v. 41, p. 351-360. 



(103) Whitney, M., and Cameron, F. K. 1903 The chemistry of the soil as related 



to crop production. U. S. Dept. Agr. Bur. Soils Bui. 22, p. 1-71. 



(104) Whitson, a. R. 1903 Studies in the development and distribution of nitrates and 



total water-soluble salts in field soils. Wis. Agr. E.xp. Sta. 20th Ann. Rpt., 

 p. 339-344. 



(105) Wilson, A. 1915 Changes in soil brought about by heating. In Sci. Proc. Roy. 



Dublin Soc, v. 14 (n. s., no. 38), p. 513-520. 



(106) Wilson, G. W. 1914 Studies of plant growth in heated soils. In Biochem. Bui., 



V, 3, p. 202-209. 



