THE EFFECTIVE USE OF LAND AS SHOWN BY YIELD 19 
WHEAT 
AVERAGE YIELD PER ACRE IN BUSHELS 
5-YEAR PERIODS, 1885-89 —-1520-24 
PENNSYLVANIA | MARYLAND | 
BUSHELS 
PER 
ACRE 
20 
NEW YORK 
is 
OHIO INDtANA 7 ILLINOIS 
20 - 
15 = =-S-E 
10 4-2-3828 ee 
EGET 
5 ;+§@eeeae 
ik = = 
MINNESOTA 
NORTH DAKOTA WASH. S 
1S = 
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Fre. 8.—As in the ease of acre-yields of corn, the trend in wheat yields in northeastern 
United States (New York, Pennsylvania, Ohio, etc.) has been generally upward. The 
decrease indicated in Ohio, Indiana, and Illinois during 1920-1924 was a result largely 
of the unfavorable weather conditions during the years 1920-1922, inclusive. Con- 
tinued expansion in both the winter-wheat and spring-wheat regions onto drier lands 
has caused acre-yields to remain stationary or decline. The fall in wheat yields in 
Washington in recent years is said to be a resuit of the expansion of the wheat area 
into the drier portions of the State 5 
