24 BULLETIN 963, U. S. DEPARTMENT OF AGRICULTURE. 
given as 129 hours per acre. . In the Idaho Falls area the total man- 
labor requirement for the initial study was 119.4 hours per acre, 
whereas in this study it is given as 119 hours. In the Provo area, 
which can be compared with the Lehi district, the total man-labor 
requirement was 130.8 hours per acre in 1915-16, whereas in this 
investigation the total for the Lehi district was 181 hours per acre. 
It may be stated that the high labor requirement for manuring sugar 
‘beets in the Lehi area made the total requirement comparatively 
high. The average yield in the Provo area was essentially 15 tons in 
1915-16, whereas in the Lehi district a yield of 16.1 tons was obtained 
in 1918. This difference would not appreciably change the labor 
requirements. 
Fie. 5.—Sugar beets grown in rotation, and receiving applications of farm manure at regular intervals. 
Result: Good stand, healthy condition, high yield, and low cost per ton. 
The horse-labor requirements were somewhat lower in 1914-15 than 
in the current survey. These increases for the respective districts 
are distributed quite uniformly over the preparatory operations, 
such as plowing, leveling, harrowing, etc. Evidently somewhat 
more time was necessary to bring the soil into suitable condition 
than in the former years. 
LABOR REQUIREMENTS, BY OPERATIONS. 
In compiling the tables which include the normal time for each 
field operation the average crew size has been used. This item re- 
quires a brief explanation. When all farms within a given district 
are brought together, crews of various sizes will be found within the 
group. The degree of variation will depend largely upon the type of 
operation. Cultivating will not include more than two crews as a 
rule. These will usually consist of one man and one horse and one 
