8 BULLETIN 30, U. S. DEPARTMENT OF AGRICULTURE. 
heading and ripening. During the past five years, however, there 
has been no such serious effect on the crops at the Nephi substation 
except in the case of sprmg grains. The season of 1910 was the most 
severe of any of the past five. 
EVAPORATION. 
Since 1908 the daily evaporation has been recorded for the months 
of April to October, inclusive. ‘The method of determining the evapo- 
ration is that employed 
at all of the stations 
where the Biophysical 
Laboratory of the Bureau 
of Plant Industry has been 
cooperating; hence, the 
results obtained at Nephi 
are made directly com- 
MAY SUNE SULY AUG, SEPT. OCF. NOK DEC. 
SIN, FEC. 4 
20 
19 
< ea ees ee ae parable with those ob- 
NAG tained at other points. 
2 Sane Bees The average evapora- 
Ne Pe Lo eee ae tion at Nephi during the 
Ce Pam es | V/ | six summer months from 
ea Se te 
SCC CCTICT PTAA ET stusive, for the past fv 
N eee Seale eee years has been 45.57 
$07 inches. This amount is 
practically an average of 
ae apa| the amounts determined 
by the Biophysical Lab- 
oratory at the various 
ae lae dry-land experiment sta- 
a tions in the Great Plains 
Q/ Palesre i area and westward. 
The average daily 
Fig.6.—Graph showing the average monthly precipitation in evaporation by months 
inches during the 15-year period, 1898 to 1912, inclusive, at gnd the monthly evapo- 
the substation, Nephi, Utah. Rope Rea (in inches) Be re 
Nephi substation for the six summer months of the five years from 
1908 to 1912, with the 5-year averages, are given in Table III. 
1 Briggs, L. J.,and Belz,J.O. Dry farming in relation to rainfall and evaporation, U. S. Department of 
mene Re Bureau of Plant Industry, Bulletin 188, p. 16-20, 1910. 
