368 Journal of A gricultural Research voi. xii, no. e 



(53) Snyder, Harry. 



1904. THE WATER-SOLUBLE PLANT FOOD OF SOILS. Ill Science, n. s., v. 19, 



no. 491, p. 834-835. 

 (54) ^"d Hummel, J. A. 



1905. SOIL INVESTIGATIONS. Minn. Agr. Exp. Sta. Bui. 89, p. 189-212, 2 pi. 



(55) Thompson, H. S. 



1850. ON THE ABSORBENT POWER OK SOILS. In Joxir. Roy. AgT. Soc. England, 

 V. II, p. 68-74. 



(56) TOULAIKOV, N. M. 



1913. THE INFLUENCE OF THE OSMOTIC PRESSURE OF THE SOIL SOLUTION ON THB 



GROWTH OP SPRING WHEAT. (Abstract.) In Intemat. Inst. Agr. 

 [Rome] Mo. Bui. Agr. Intel!, and Plant Diseases, year 5, no. 11, 

 p. 1426-1429. 1914. (Original article in La P^dologie, aim. 15, 

 no. 4, p. 71-103. 1913. Not seen.) 

 (57) 



1916. OSMOTIC PRESSURE OF THE SOIL SOLUTION AND THE VITREOUS STATE OP 



BELOTOURKA GRAIN. (Abstract.) In Chem. Abstracts, v. 10, no. 23, 

 p. 3127-3128. 1916. (Original article in Zhur. Opuitn. Agron. [Russ. 

 Jour. Expt. Landw.], v. 17, p. 79-92. 1916. Not seen.) 



(58) Ulbricht, R. 



1863. EiN BEiTRAG zur METHODS DER BODEN-ANALYSE. In Landw. Vcrs. 



Stat., Bd. 5, p. 200-209. 



(59) Van Suchtelen, F. H. H. 



I912. METHODE zur GEWINNUNG DER NATtJRLICHEN BODENLOSUNG. /» 



Jour. Landw. Bd. 60, Heft 4, p. 369-370. 



(60) Way, J. T. 



1850-52. ON THE POWER OP SOILS TO ABSORB MANURE. In Jour. Roy. AgT. 



Soc. England, v. 11, p. 319-380, 1850; v. 13, p. 123-143, 1852. 



(61) Whitney, Milton, and Cameron, F. K. 



1903. THE chemistry of THE SOIL AS RELATED TO CROP PRODUCTION. U. S. 



Dept. Agr. Biu". Soils Bui. 22, 71 p. 



(62) Wolff, Emil. 



1864. ENTWURF ZUR BODENANALYSE. In Landw. Vers. Stat., Bd. 6, p. 141- 



171. 



(63) WundER, Gustav. 



i860. uEber DIE IN DEM boden enthaltenden losungen. In Landw. Vers. 

 Stat., Bd. 2, p. 104-112, 



