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BOTANICAL GAZETTE [FEBRUARY 
, The significance of the sulphur in sulphate of ammonia applied to 
certain soils. Soil Science 5:81~86. 1918. 
. Lipman, J. G., and Jorre, J. S., The influence of initial reaction on the 
oxidation of sulphur and the formation of available phosphates. Soil 
Science 10:327-332. 1920. 
. Lipman, J. G., and McLean, H. C., Sulphur-phosphate composts under 
field conditions. Soil Science 5:243-250. 1918. 
. Lipman, J. G., McLean. H. C., and Lint, H. C., Sulphur oxidation in 
soils and its effect on the availability of mineral phosphates. Soil Science 
2:498-538. 1916. 
. Lyon, T. L., and Bizzex1, J., Lysimeter experiments. Cornell Univ. 
Agric. Exp. Sta. Mem. 12. 1918. 
. McCatt, A. G., and Smits, A. M., Effect of manure-sulphur composts 
upon the availability of the potassium of greensands. Jour. Agric. Res 
19:239-255. 1920. 
. McCoo1, M. M., and Mirtar, C. E., Effect - ae sulphate on the 
solubility of soils. Jour. Agric. Res. 19:47-54. 
. MacIntire, W. H., Wits, L. G., and Hoe. "W. A., The divergent 
effects of lime and Sates upon the conservation of soil sulphur. Soil 
Science 4:231-237. I 
. McLean, H. C., The BEES of sulphur by micro-organisms 2 = rela- 
tion to the availability of phosphates. Soil Science 5:251-290 
. McMirrar, P. R., Influence of gypsum upon the solubility of eal in 
soils. Jour. Agric. Res. 14:61-66. 1918. 
. Mares, M. H., Des transformations que subit le soufre en poudre (fleur 
de soufre et soufre trituré) ‘gee il est répandu sur le sol. Compt. Rend. 
Acad. Sci. Paris 69:974-9709. 
Mriiter, H. G., Sulphates seine plant growth and composition. Jour. 
Agric. Res. 17: BF i6x. IgI9Q. 
. Morse, F. W., and Curry, B. E., The availability of the soil potash in 
clay and clay loam soils. N.H. Agric. Exp. Sta. Bull. 142. pp. 49-51. 
1909. 
Notte, Orro, Uber die Ursache der stickstoffverluste aus Jauche und 
Stallmist. Landw. Vers. Stat. 96:3097324. 1920. 
. Otson, Geo. A., Unpublished work of the Chemistry Department, Washing- 
ton State College. 
. Peterson, W. H., Forms of sulphur in plant materials and their variation 
with the soil supply. Jour. Amer. Chem. Soc. 36:1290-1300. 1914. 
. PFEIFFER, TH., and BLANcK, E., Landw. Vers. Stats. 83:359-383. 1914. 
. Pitz, W., Effect of elemental sulphur and calcium sulphate on certain of 
the higher and lower forms of plant life. Jour. Agric. Res. 5:771-780. 
1916. 
58. Reimer, F. C., and Tartar, H. V., Sulphur as a coh ete for alfalfa in 
Southern ae Ore. Agric. Exp. Sta. Bull. 163. 1 
