8 



BULLETIN 157,, II. 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 



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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 (6) that the loss of moisture from spring to fall was 



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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. 

 in figures 1, 2, and 3. 



These facts are shown graphically 



