216 SOIL PHYSICS AND MANAGEMENT 



36. How do different soils compare in the amount of available moisture? 



37. A soil in the field contains 26.3 per cent of moisture and the hygro- 



scopic coefficient is 6.5 per cent. How much available moisture does 

 the soil contain? 



REFERENCES 



1 Briggs, L. J., Yearbook, U. S. D. A., 1898, p. 399. 



I Briggs, L. J., and MoLane, J. W., The Moisture Equivalents of Soils, 



Bulletin 45, Bureau of Soils, U. S. D. A., 1907. 



3 King, F. H., Wisconsin Station, 7th Ann. Report, p. 144. 



4 Smithsonian Physical Tables, 1896, p. 136. 

 "King, F. H., Physics of Agriculture, 1901, p. 170. 

 'Unpublished data, Soil Physics Division, University of Illinois. 

 7 Lyon, T. L., and Fippin, E. O., Soils, 1909, p. 160. 



8 Karraker, P. E., Journal of Agricultural Research, Vol. 4, No. 2, pp. 



187 to 192. 



'Unpublished data, Soil Physics Division, University of Illinois. 

 "King, F. H., Wisconsin Station, 7th Ann. Report, p. 151. 



II Rotmistrov, V. G., Nature of Drought According to the Evidence of the 



Odessa Experiment Station, Russia, English edition, 1913. 



" Hall, A. D., The Book of the Rothamsted Experiments, 1905, p. 23. 



"Lynde, C. J., and Dupre", H. A., Jour. Am. Soc. Agron., Vol. 5, No. 2, 1913, 

 p. 111. 



14 Lynde, C. J., and Bates, F. W., Proceedings Am. Soc. Agron., Vol. 4, pp. 

 102-122. Lynde, C. J., and Dupre, H. A., Jour. Am. Soc. Agron., Vol. 

 5, No. 2, Vol. 7, Nos. 1 and 6. 



" King, F. H., Physics of Agriculture, 1907, p. 172. 



lfl Briggs, L. J., and Shantz, H. L., Bulletin 230, Bureau of Plant Industry, 

 U. S. D. A., The Wilting Coefficient for Different Plants and Its In- 

 direct Determination, 1912, p. 72. 



"Op. Cit., pp. 26-33. 



General Reference Briggs, L. J.. Bulletin 10, Division of Soils, U. S. 

 D. A., Mechanics of Soil Moisture, 1897. 



