Oct. 22, 1917 
Effect of Sulphur on Different Crops and Soils 
103 
(3) Analyses of some of the crops show that the sulphur increased the 
total and sulphate-sulphur content of the plant, and the greater the 
application, the greater the increase. 
(4) Where sulphur wasa pplied to clover and alfalfa, the excess sulphur 
in those plants was in the form of sulphate, while in soybeans part of the 
excess was in another form. 
(5) In the' soybeans which showed an increased sulphur content, no 
corresponding increased protein content was always found. In five 
instances out of eight, however, soybeans grown in soil where sulphur 
was added show an increase in the total weight of protein. 
(6) It was found that, of the 16 varieties of field and garden seeds 
examined, some contain sulphates, while others do not, but that, on 
germinating, all except two form a greater or less amount of sulphate. 
The highest sulphate content obtained in the ungerminated seed was 
0.048 per cent, in clover, and the increase due to germination varied from 
none, in corn, to 0.035 per cent, in the onion. There was a slight, loss 
in only one sample, clover. 
literature CITED 
(1) Ames, J. W., and Boltz, G. E- 
1916. sulphur in relation to soils and crops. Ohio Agr. Exp. Sta. Bui. 
292, p. 221-256. References, p.255-256. 
(2) Brown, P. E., and Kellogg, E. H. 
1914. sulfofication in soils. Iowa Agr. Exp. Sta. Research Bui, 18, p. 49-1 n. 
(3; Fred, E. B., and Hart, E. B. 
1915. THE COMPARATIVE EFFECT OF PHOSPHATES AND SULPHATES ON SOIL BAC¬ 
TERIA. Wis. Agr. Exp. Sta. Research Bui. 35, p. 35-66, 6 fig. 
(4) Hart, E. B., and Peterson, W. H. 
1911. SULPHUR REQUIREMENTS OF FARM CROPS IN RELATION TO THE SOIL AND 
air supply. Wis. Agr. Exp. Sta. Research Bui. 14, 21 p. 
(5) ShEdd, O. M. 
1913. THE SULFUR CONTENT OF SOME TYPICAL KENTUCKY SOILS. Ky. Agr. Exp. 
Sta. Bui. 174, p. 269-306. References, p. 306. 
1914. THE RELATION OF SULFUR TO SOIL FERTILITY. Ky. Agr. Exp. Sta. Bui. 
188, p. 595-^30- 
(6) 
