Dec. 15,1919 Oxidation of Sulphur in Soils 345 



(5) Brown, P. E., and Kellogg, E. H. 



1914. SULFOFICATION IN SOILS. lowa AgT. Exp. Sta. Research Bui. 18, p. 

 49-11 I. 



(6) and Warner, H. W. 



1917. THE PRODUCTION OP AVAILABLE PHOSPHORUS FROM ROCK PHOSPHATE. 

 BY COMPOSTING WITH SULFUR AND MANURE. In Soil Sci., V. 4, no. 



4, p. 269-282, 3 fig. References, p. 282. 



(7) LiPMAN, Jacob G., and McLean, Harry C. 



191 7. vegetation EXPERIMENTS ON THE AVAILABILITY OF TREATED PHOS- 



PHATES. Soil Sci., V. 4, no. 4, p. 337-342, i pi. 

 (8) 



1918. EXPERIMENTS WITH SULFUR-PHOSPHATE COMPOSTS CONDUCTED UNDER 



FIELD CONDITIONS. In Soil Sci., v. 5, no. 3, p. 243-250. 

 (9) and Lint, H. Clay. 



I918. THE OXIDATION OF SULFUR IN SOILS AS A MEANS OF INCREASING THE 

 AVAILABILITY OF MINERAL PHOSPHATES. In Soil Sci., V. I, no. 6, 



P- 533-539- 

 (lo) 



1916. SULFUR OXIDATION IN SOILS AND ITS EFFECT ON THE AVAILABILITY OF 



MINERAL PHOSPHATES. In Soil Sci., v. 2, no. 6, p. 499-538, 5 fig. 

 Literature cited, p. 535-538. 



(11) McLean, Harry C. 



1918. THE OXIDATION OF SULPHUR BY MICROORGANISMS IN ITS RELATION TO 

 The AVAILABILITY OF PHOSPHATES. In Soil Sci., V. 5, no. 4, p. 

 251-290. References, p. 287-290. 



Cites unpublished theses by McLean (p. 252) and paper by Mar^s (p. 252). Quotes 

 from Panknin's application for patent (p. 252). 



(12) Shedd, O. M. 



i913. the sltlfur content of some typical kentucky soils. ky. agr. 

 Exp. Sta. Bal. 174, p. 211-250. References, p. 250. 

 (13) 



(14) 



1914. THE RELATION OF SULFUR TO SOIL FERTILITY. Ky. Agr. Exp. Sta. 

 Bul. 188, p. 593-630. Bibliography, p. 629-630. 



I917. EFFECT OF SULFUR ON DIFFERENT CROPS AND SOILS. /jl Jour. Agr. 



Research, v. 11, no, 4, p. 91-103. Literature cited, p. 103. 



