U. S. DEPARTMENT OF AGRICULTURE. 

 BUREAU OF PLANT INDUSTRY— BULLETIN NO. 230. 



B. T. GALLOWAY, Chief of Bureau. 



THE WILTING COEFFICIENT FOR DIFFERENT 



PLANTS AND ITS INDIRECT 



DETERMINATION. 



BY 



LYMAN J. BRIGGS, 



Physicist in Charge of Physical Investigations, 



AND 



H. L. SHANTZ, 



Physiologist, Alkali and Drought Resistant Plant Breeding Investigations. 



Issued February 3, 1912. 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE, 



1912, 



