HE I GHT 



(INCHES) 

 9 



^^^^ 



— .r^tss --^ 



(inches; 



9 



PROBABLE LEVEL OF AVAILABILITY OF FEEC) 



MARCH 15 



APRIL 1 



APRIL 15 



MAY 1 



MAY 1 5 



Figure 2. --Heights of plants of five grass species at five dates. Heights shown are 

 averages of measurements in 1947, 1948, 1949, and 1950. Elmore County. 



100 



900 



800 



700 



600 



500 



400 



3 00 



200 



1 00 



HERBAGE YI ELD 

 BEST YEAR 

 OF THREE 



POOREST YEAR 

 OF THREE 



F C 



-SPRING GRAZING SEASON 



MARCH 15 MARCH 31 APRIL 15 APRIL 30 WAY 15 



Figure 3. --Herbage yield of fairway wheatgrass (F) and cheatgrass (C) on five dates in spring, 

 showing highest and lowest yields for each date in 1948, 1949, 1950. Elmore County. 



2 



