TILLAGE AND EOLATION EXPERIMENTS AT NEPHI, UTAH. 
19 
Table VII. — Annual and average yields of winter wheat on cultivated and uncul- 
tivated falloiu at the Nephi substation, for the years 1910 to 1913, inclusive. 
Treatment. 
Yield per aero of grain (bushels). 
1910 
1911 
1912 
1913 
Average. 
Fallow cultivated 
13 
14 
29 
18 
21 
15 
5 
5 
17 
13 
Cultivation of Spring-Plowed Fallow. 
In the spring of 1912 tests similar to the ones last discussed were 
begun on spring-plowed fallow. Both plats produced winter wheat 
/SOS 
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/9/2 
A\Z£Tf?AG£T 
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\ 
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1 
£??&£. A/VA T~/G >A/ 
CULT/MT£D /VO&AmLLV 
A/OT CULT/WTETD 
7ALLV — I 
Fig. 9.— 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 summer-cultivation tests of fall- 
plowed fallow at the Nephi substation, 1909 to 1912, inclusive. 
in 1911 and were left in stubble during the winter. They were plowed 
uniformly as soon as possible the next spring. One was then culti- 
vated normally during the summer of 1912, while the other was not 
cultivated. There were practically no weeds or volunteer grain on 
