CEREAL INVESTIGATIONS AT THE NEPHI SUBSTATION. 



July are by far the driest months. Most of the precipitation from 

 November to March comes in the form of snow. The average 

 monthly distribution of the annual precipitation at Nephi, 1898 to 

 1912 7 inclusive, is shown graphically in figure 6. 



Since 1908 an accurate record of the daily rainfall at the Nephi 

 substation has been kept. A summary of these data is presented in 

 Table II 7 which shows the number of days in each month from 1908 

 to 1912 on which rain fell, the number on which the precipitation 

 exceeded 0.5 inch, and the maximum and minimum rainfall on any 

 one day. 



Table II. — Precipitation at the Nephi substation, 1908 to 1912, showing the number oj 

 days in each month on which rain fell, the number of days on which the precipitation 

 exceeded 0.5 inch, and the maximum and minimum rainfall on any one day. 





1908 



1909 



1910 



1911 



1912 





Rainy 



days. 



Inches 

 of rain. 



Rainy 

 days. 



Inches 

 of rain. 



Rainy 

 days". 



Inches 

 of rain. 



Rainy 

 days. 



Inches 

 of rain. 



Rainy 

 days. 



Inches 

 of rain. 



Month, etc. 



3 

 o 



o 



.9 



o 



> 



° 



a 



3 



1 



X 



i 

 1 



•S 

 3 



3 

 o 



Eh 



o 



.a 



o 



(V 



> 



O 



a 



3 



a 



3 



1 

 .9 



3 



o 



.9 



o 

 !> 



o 



a 



| 



a 

 1 



3 

 3 



o 



&H 



o 



O 



a 

 1 



a 



s 



a 



.5 



3 

 o 



r- 



si 

 1 

 o 



> 

 



a 



a 



a 



d 



g 



3 



a 

 .a 



January 



February 



4 

 5 

 4 

 2 

 9 

 9 

 6 

 3 

 6 

 2 

 1 

 3 





 

 1 

 

 3 

 

 

 2 

 2 

 2 

 1 

 1 



0.37 



.42- 



.76 



.25 



1.15 



.21 



.22 



2^61 



1.41 



1.20 



.46 



.53 



0.03 

 .10 

 .03 

 .04 

 .02 

 .01 

 .02 

 .10 

 .02 

 .53 

 .00 

 .04 



6 

 5 

 6 

 6 

 5 

 1 

 6 

 13 

 8 

 2 

 5 

 6 



1 



2 

 

 2 

 

 

 

 3 

 

 

 1 

 1 



1.30 

 .69 

 .42 

 .78 

 .46 

 .17 

 .37 

 .72 

 .15 

 .21 

 .90 

 .50 



0.13 

 .06 

 .03 

 .12 

 .01 

 .00 

 .05 

 T. 

 .02 

 .11 

 .10 

 .05 



6 

 4 

 2 

 4 

 5 

 1 

 14 

 8 

 9 

 5 

 3 

 3 





 



1 





 

 

 

 



1 

 1 







1 



0.20 

 .31 

 .76 

 .40 

 .27 

 .03 

 .15 

 .05 

 .61 

 .83 

 .43 

 .65 



0.01 

 .04 

 .05 

 T. 

 T. 

 .00 

 T. 

 T. 

 T. 

 T. 

 .07 

 .04 



4 

 5 

 2 

 4 

 2 



8 

 8 

 3 

 7 

 4 



I 



1 

 



2 

 

 







1 







1 





 

 



1.38 

 .28 

 .53 

 .28 

 .17 

 .43 

 .65 

 .28 

 .72 

 .46 

 .31 

 .23 



0.10 

 .05 

 .52 

 .05 

 .07 

 T. 

 T. 

 T. 

 T. 

 .07 

 .13 

 .10 



4 

 3 

 8 



10 

 7 

 5 

 8 

 7 

 4 



12 

 5 

 3 



o'o. 13 



.10 

 3 .75 



1 .58 

 1 .55 

 .11 

 .36 

 o! .14 



.44 

 11.17 



1 .51 

 0| .14 



0.07 

 .09 

 05 



April 



03 





(P, 





T 



Julv 



01 





T 



September 



October 



November 



December 



T. 

 T. 

 .02 

 .05 



For the vear: 

 Total 



54 

 9 

 1 



12 

 3 











69 



13 



1 



10 

 3 

 







64 

 14 



1 



4 

 1 



° 







54 

 8 

 2 



5 

 2 

 







76 

 12 

 3 



7 



3 











Maximum. 

 Minimum.. 



2.61 



6~" 



1.30 



".00 



.83 



.00 



1.38 



"t." 



1.17 



T." 



i T=trace. 



Table II shows that most of the rains falling at the Nephi sub- 

 station are small and in many cases negligible. This fact is not so 

 serious during the early or late months of the year when evaporation 

 is slight, but from March to August any rain of less than 0.5 inch is 

 practically useless in so far as direct benefit to the crop is concerned. 

 It is not sufficient to more than saturate the dry surface of the soil 

 and thus does not allow the addition by percolation of any moisture 

 to that below. Because it remains in the surface few inches it is 

 almost entirely lost by evaporation before the crop can make any 

 use of it. Table II shows further that in June of the past five years 

 there has been not one rain of as much as 0.5 inch. July has had one. 

 This lack of rainfall in June and July often has a serious effect on 

 the cereal crops, which at that time are passing from the boot to full 



