384 SOIL CONDITIONS AND PLANT GROWTH 



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292. Waksman, Selman A., (a) " Bacterial Numbers in Soils at Different 



Depths, and in Different Seasons of the Year," Soil Sci., 1916, i., 

 363-80 276 



(b) " Studies on Soil Protozoa," ibid., 1916, i., 135-52 ; 1916, ii., 363- 



76 290, 294 



(c) " Soil Fungi and their Activities," ibid., 1916, ii., 103-55 (Biblio- 

 graphy) 257 



(d) " Importance of Mould Action in the Soil," ibid., 1918, vi., 

 r 37-55 (Bibliography) 258, 259 



(e) Waksman, S. A., and Curtis, R. E., " Actinomyces in Soil," ibid., 

 1916, i., 99-134, and 1918, vi., 309 ....... 260 



(/) Waksman, S. A., " Cultural Studies of Species of Actinomyces," 

 ibid., 1919, viii., 71-207 260 



293. Wallerius, Johan Gotschalk, Agriculture Fundamenta Chemica : 



Akerbrukets Chemiska Grander, 1761, Upsala ..... 7 



294. Ward, Marshall, " On the Tubercular Swellings on the Roots of Vicia 



Faba," Phil. Trans., 1887, clxxviii., 539-62 ..... 205 



295. Warington, R., " On the Amount and Composition of the Rain and 



Drainage Waters collected at Rothamsted," Journ. Roy. Agric. 

 Soc., 1881, xlii., 241, 311, and 1882, xliii., i 23 



296. Warington, R., " On Nitrification," Part I., Journ. Chem. Soc., 1878, 



xxxiii., 44 51 ; Part II., ibid., 1879, xxxv., 429-56; Part III., ibid., 

 1884, xlv., 637-72 ; Part IV., ibid., 1891, lix., 484-529 . 23, 189, 190 



297. Warington, R., " Denitrification and Farmyard Manure," Journ. Roy. 



Agric. Soc., 1897, vm -> 577-607 209 



298. Way, J. T., (a) " On the Power of Soils to Absorb Manure," ibid., 



1850, xi., 313-79 ; ibid., 1852, xiii., 123-43 .... 150, 153 

 (b) " On the Composition of the Waters of Land Drainage and of 

 Rain," ibid., 1856, xvii., 123-62 ....... 22 



299. Weber, C. A., " Die wichtigsten Humus- und Torfarten und ihre 



Beteiligung an dem Aufbau norddeutscher Moore," Festschrift zur 

 Feier des 2^-Jahrigen Bestehens des Vereins zur Forderung der Moor- 

 Kultur im Deutschen Reich, Berlin, 1908 134 



300. Weinhold, A., " Einwirkung von Ammoniaksalzen auf Boden," 



Landw. Versuchs-Stat., 1863, v., 308-17 156 



30oa. Weir, W., " The Effect of Removing the Soluble Humus from a Soil 



on its Productiveness," Joum. Agrtc. Sci., 1915, vii., 246-53 . . 144 



301. Weis, Fr., " Ueber Vorkommen und Bildung der Salpetersaure in 



Wald und Heideboden," Centr. Bakt. Par., Abt. II., 1910, xxviii., 

 434-6o 146 



302. Westermann, " Untersuchung von typischen danischen Boden," 



1902, abstract in Bied. Zent. Agric. Chem., 1903, xxxii., 155 . . 139 



303. Wheeler, H. J., Rhode Is. Expt. Sta., Third Ann. Rpt., 1891, p. 53 ; 



Fourth Report, et seq. . . . . . . . . .116 



304. Whitney, M., " Some Physical Properties of Soils in their Relation to 



Moisture and Crop Distribution," U.S. Weather Bureau, Bull. 4, 

 1892 172 



305. Whitney, M., and Cameron, F., (a) " The Chemistry of the Soil as 



Related to Crop Production," U.S. Dept. Agric. Bureau of Soils, 



Bull. 22, 1903 124, 172, 247 



(b) " Investigations in Soil Fertility," ibid., Bull. 23, 1904 . . . 172 



