UNITED STATES DEPARTMENT OF AGRICULTURE 
DEPARTMENT BUUETIN No. 1004 
Washington, D. C. 
PROFESSIONAL PAPER 
March 31. 1923 
USE OF WATER BY SPRING WHEAT ON 
By 
JOHN S. COLE, Agronomist, and 
0. R. MATHEWS, Assistant Agronomist in Dry-Land 
Agriculture with an introduction by E. C. CHILCOTT, Agriculturist 
in Charge of the Office of Dry-Land Agriculture Investigations, Bureau of Plant Industry 
CONTENTS 
Page 
InboducUoD 1 
Statement of the problem 2 
Source, character, and method of study of the data ' 3 
Daily rate of the use of water while the crop is growing rapidly 6 
Rate of the use of water as the soil moisture approaches depletion 11 
Rate of the use of water during the growing season 12 
Quantity of water used during the growing season 20 
Correlation between the use of water and the yield at indindual stations 26 
General discussion of the results 30 
Condusions 32 
WASHINGTON 
GOVERNMENT PRINTWG OFHCE 
1923 
