366 Journal of Agricultural Research voi. xii. no. 6 



{22) Grouven, H. 



1858. bEmERkungen zu uEbig's ansichten. (Abstract.) In Jahresber. 

 Agr. Chem., Jahrg. i, 1858/59, p. 13-14- i860. (Original article in 

 Agron. Ztg., Jahrg. 13, No. 30, p. 465-470. 1858. Not seen.) 



(23) Hall, A. D., BrenchlEy, Winifred E., and Underwood, Lilian M. 



1913. THE SOIL SOLUTION AND MINERAL CONSTITUENTS OP THE SOIL. In Phil. 



Trans. Roy. Soc. London, ser. B, v. 204, no. 307, p. 179-200, 2 tig. 



(24) Harris, F. S., and Butt, N. J. 



1917. EFFECT OF IRRIGATION WATER AND MANURE ON THE NITRATES AND TOTAL 



SOLUBLE SALTS OF THE SOIL. In Joiir. Agr. Research, v. 8, no. 9, p. 

 333-359. 18 fig. Literature cited, p. 359. 



(25) HeydEN, Eduard. 



1865. UEBER DEN PHOSPHORSAUREGEHALT IN WASSRIGEN BODENAUSZUGEN. 



(Abstract.) In Jahresber. Agr. Chem., Jahrg. 8, 1865, p. 33-34. 

 1867. (Original article in Ann. Landw., Jahrg. 45, p. 189-194. 1865. 

 Not seen.) 



(26) HiLGARD, E. W. 



1903. METHODS OF PHYSICAL AND CHEMICAL SOIL ANALYSIS. Cal. Agr. Exp. 



Sta Cir. 6, 23 p., i fig. 



(27) HOAGLAND, D. R. 



191 7. THE FREEZING-POINT METHOD AS AN INDEX OF VARIATIONS IN THE SOIL 



SOLUTION DUE TO SEASON AND CROP GROWTH. In Jour. Agr. Research, 

 V. 12, no, 6, p. 369-395. 9 fig- 



(28) Hoffmann, Robert. 



1863. UEBER QUALITAT UND QUANTITAT DER AUS DER ACKERERDE DURCH EINES 



WASSER AUFNEHMBAREN BODENBESTANDTHEiLE. In Landw. Vers. 

 Stat., Bd. 5, p. 193-197- 



(29) ISCHEREKOV, V. 



1907. THE OBTAINING OF THE SOIL SOLUTION IN UNALTERED CONDITION. (Abs- 

 tract.) In Exp. Sta. Rec, v. 19, no. 5, p. 409. 1908. (Original 

 article in Zhur. Opuitn. Agron. [Russ. Jour. Expt. Landw.], v. 8, no. 

 2, p. 147-166. 1907. Not seen.) 



(30) 



1911. SOIL SOLUTIONS. (Abstract.) /« Exp. Sta. Rec, v. 28, no. 4, p. 320-321. 

 19 13. (Original article in Zhur. Opuitn. Agron. [Russ. Jour. Expt. 

 Landw.], v. 12, no. 4, p. 558-560, 1911. Not seen.) 



(31) Jarriges, V. 



1861. ANALYSE VON kleEmuden bodenarten. (Abstract.) In Jahresber. 

 Agr. Chenu, Jahrg. 4, 1861/62, p. 36-37. 1863. (Original article in 

 Chem. Ackersmann, 1861, p. 83. 1861. Not seen.) 



(32) Jensen, C. A. 



1916. SOLUBILITY OF PLANT-FOOD ELEMENTS AS MODIFIED BY FERTILIZERS. In 



Jour. Amer. Soc. Agron., v. 8, no. 2, p. 100-105. 



(33) Jordan, W. H. 



1916. MEASUREMENTS oP SOIL FERTILITY. N. Y. State Agr. Exp. Sta. Bui. 

 424, p. 389-412. 



(34) King, F. H. 



1904. investigations in soil management, being three of six papers on 

 the influence op soil management upon the water-soluble 



SALTS IN SOILS AND THE YIELD OP CROPS. l68p.,2lfig. MadisoU, Wis. 

 (35) 



1905. INVESTIGATIONS IN SOIL MANAGEMENT. U. S. Dept. Agr. Bur. Soils Bul. 

 26, 205 p., 9 fig., 4 pi- 



