406 DRY-FARMING 
period of nineteen years, namely, in 1903, when the. 
same thing was done, and one crop was made to follow 
another without an intervening fallow period. This 
observation is an evidence in favor of clean summer 
fallowing. The largest crop obtained, 28.9 bushels 
per acre in 1902, was gathered in a year when the next 
to the lowest rainfall of the whole period occurred, 
namely, 11.41 inches. 
The precipitation varied during the nineteen years 
from 10.33 inches to 18.46 inches. The variation in 
yield per acre was considerably less than this, not 
counting the two crops that were grown immediately 
after another crop. ‘All in all, the unique record of the 
Barnes dry-farm shows that through a period of nine- 
teen years, including dry and comparatively wet 
years, there was absolutely no sign of failure, except 
in the first year, when probably the soil had not been 
-put in proper condition to support crops. In pass- 
ing it may be mentioned that, according to therecords 
furnished by Senator Barnes, the total cost of operat- 
ing the farm during the ‘nineteen years was $4887.69 ; 
the total income was $10,144.83. The difference, 
$5257.14, is a very fair profit on the investment of 
$1800 — the original cost of the farm. 
The Indian Head farm 
An equally instructive record is furnished by the 
experimental farm located at Indian Head in Sas- 
katchewan, Canada, in the northern part of the Great 
