374 SOIL CONDITIONS AND PLANT GROWTH 



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176. Lipman, J. G., and Brown, Percy E., (a) " Experiments on Ammonia 



and Nitrate Formation in Soils," Centr. Bakt. Par., Abt. IT., 1910, 



xxvi., 590-632 263, 275 



(b) " Ammonification in Culture Solutions as Affected by Soil Treat- 

 ment," N.J. Ag. Expt. Sta. 28th Ann. Rept., 1907, 195-9 . 263, 275 



177. Lipman, J. G., Brown, Percy E., and Owen, Irving L., "The Avail- 



ability of Nitrogenous Materials as Measured by Ammonification," 

 Centr. Bakt. Par., Abt. II., 1912, xxxi., 49-85. (See also New 

 Jersey Agric. Expt. Stat. Repts.) 263 



178. Livingstone, Burton Edward, (a) The Relation of Desert Plants to 



Soil Moisture and Evaporation, Carnegie Institution of Washington, 

 No. 50, 1906. 



(b) " The Relation of the Osmotic Pressure of the Cell Sap in Plants to 

 Arid Habitats," Plant World, 1911, xvi., 153-64 .... 46 



(c) Livingstone, B. E., and Free, E. E., Contributions to Plant Physi- 

 ology, John Hopkins Univ., 1917, 182. " The Effects of Deficient 



Soil Oxygen on the Roots of Higher Plants " 52 



179. Livingstone, Burton Edward, Jensen, Breazeale, Pember, and Skinner, 



" Further Studies on the Properties of Unproductive Soils," U.S. 

 Dept. of Agrt,c. Bur. of Soils, Bull. 36, 1907 248 



180. Loew, Oscar, (a) " Ueber die physiologischen Functionen der Cal- 



cium und Magnesium salze im Pflanzenorganisms," Flora, 1892, 

 Ixxv., 368-94. (A complete list of Loew's papers on this subject is 

 given in Munch, med. Woch., 1910, No. xlix.) 75 



(b) "The Physiological Role of Mineral Nutrients," Bull. 18, Div. 

 Veg. Phys. and Path. U.S. Dept. Agric., 1899 67 



(c) " On the Treatment of Crops by Stimulating Compounds," Bull. 

 Coll. Agric., Tokyo, 1904, vi., No. 2, 161-75 76 



(d) " Bildung von Salpetrigsaure und Ammoniak aus freien Stickstoff," 

 Ber., 1890, xxiii., 1443 216 



(e) " Flora," 1911, cii., 96-112 ........ 75 



181. Lohnis, F., (a) " Ueber Nitrifikation und Denitrifikation in der 



Ackererde," Centr. Bakt. Par., Abt. II., 1904, xiii., 706-15 . . 190 



(b) Lohnis and Parr, " Zur Methodik der bakteriologischen Boden- 

 untersuchung," ibid., 1904, xii., 262-67; 1905, xiv., 1-9; 1907, xvii., 

 518-28 263 



(c) Lohnis, F., Haudbuch der landwirtschaftlichen Bakteriologie, 1910, 

 Berlin 21, 261 



(d) Lohnis, F., and Pillai, N. K., " Ueber stickstofffixierende Bak- 

 terien," III., ibid., 1908, xx., 781-99 198 



(e) Lohnis, F., and Sabaschnikoff, A., " Ueber die Zersetzung von 

 Kalkstickstoff und Stickstoffkalk," ibid., 1908, xx., 322-32. (See 

 also Lohnis, "Verlesungen uber Landw. Bakteriologie," 1913) . 279 



182. Lohnis, F., " Untersuchungen uber den Verlauf der Stickstoffumset- 



zungen in der Ackererde," Mitt. d. Landw. Instit. Univ. Leipzig, 

 1905, 1-103. (Summary in Centr. Bakt. Par., 1905, xv., 361-65, and 

 420-35.) (See also Green, ibid., 1914, xii., 577-608) . . . 261 

 Lohnis, F., and Green, H. H., "Methods in Soil Bacteriology," ibid., 

 1914, xl., 457-79 261 



183. Lyon, T. Lyttleton, and Bizzell, James A. (a) "The Relation of 



Certain Non-Leguminous Plants to the Nitrate Content of Soils," 

 Journ. Franklin Instit., Jan., 1911 ; Cornell Mem., 1913, No. i . 298 



