July i6. 1917 Movement and Distribution of Moisture in Soil 



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The results of the 5-year averages for the com, peas, and potatoes 

 and the fallow are presented in figure 2, giving the distribution of 

 moisture by foot sections for the four periods. 



The figure shows that during the spring, until after June 16, there 

 was little difference between the moisture in the fallow and cropped 

 plots, but thereafter 

 the difference was in Percentage of moisture of d/fferent dates 



favor of the fallow. 

 In October every foot 

 in depth of the fallow 

 had a higher moisture 

 content than the 

 cropped soil. For all 

 periods the least mois- 

 ture was found in the 

 first, the fourth, and 

 the fifth feet. The 

 first foot is the only 

 one showing much 

 variation in moisture 

 during the season. In 

 all cases the fluctua- 

 tion in the fallow was 

 less than that in the 

 cropped soil. As an 

 average for all feet the 

 moisture at the end of 

 the season was only 

 slightly less than that 

 in the spring. 



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KIND OF CROP UNDER 

 DRY-FARMING CON- 

 DITIONS 



This study was con- 

 ducted at the Nephi 

 Substation for the 

 years 1909 to 191 4, 

 inclusive, on the plots 

 described in the ex- 

 periment on the effect of cropping and fallowing. The samplings in this 

 case were taken but three times : Once in the spring, once in the summer, 

 and once in the fall. 



In figure 3 is presented the average moisture distribution for com, 

 potatoes, peas, and wheat in the spring, summer, and fall for six years. 



Fig. 2. — Diagram showing the effect of intertilled cropping and fallow- 

 ing under dry-farming conditions on the seasonal distribution of 

 moisture in the soil to a depth of 6 feet. Average of five years. 



