s 
BULLETIN 157, U. S. DEPARTMENT OF AGRICULTURE. 
(4) that the average moisture content of the third, fourth, and fifth 
feet was invariably in favor of the spring-plowed plat; (5) that there 
/309 
AWEPAGE 
Fig. 1. — Graphs showing the average percentage of moisture in the first 6 feet of soil at the beginning, 
in the middle, and at the end of the fallow season, as found in the spring-plowing and fall-plowing 
tests at the Nephi substation, 1909 to 1912, inclusive. 
was little difference in the moisture content of the samples of the 
sixth foot; and (G) that the loss of moisture from spring to fall was 
22 
APP/L SAMPL/A/G 
UUA/E S/1MPL/MG 
SEPT Ss4MPUA/G 
1 
1 
1 
\ 
\ 
\ 
\ 
\ 
\ 
\ 
/ 
/ 
1 
Fig. 2. — Graphs comparing the average percentage of moisture in each of the upper 6 feet of soil at the 
beginning, in the middle, and at the end of the fallow season, as found in the spring-plowing and fall- 
plowing tests at the Nephi substation, 1909 to 1912, inclusive. 
about the same on both plats. These facts are shown graphically 
in figures 1,2, and 3. 
