THE DRY FARMING CONGRESS. 

 DIAGRAM NUMBER ONE. 



IPS" I07» 105° 103° 101° 99° 97° 



Precipitation. 



"Diagram number one represents the Great Plains Area and shows 

 the location of the eleven stations where dry land agriculture investiga- 

 tions are now being carried on. It also shows the line of 20 inches annual 

 rainfall and also three lines representing 10 inches, 15 inches and 20 

 inches, respectively, of rainfall occurring from April 1st to September 

 HOth, inclusive. 



