. 
WHEAT PRODUCTION ON DRY LANDS. ) 
The average rainfall for April, May, and June at Lind was 2.13 
inches, or 29.5 per cent of the annual precipitation. At Moro the 
~ 
average rainfall for these three months was 2.6 inches, or 22.5 per 
cent of the annual precipitation. At Nephi the average rainfall for | 
these months was 3.61 inches, or 27.1 per cent of the annual pre- 
cipitation. 
EVAPORATION. 
At Nephi and at Moro a record of the evaporation from a free water 
surface was kept. No record was kept at Lind, but records else- 
where indicate evaporation to be at least equal to if not greater 
Fic. 7.—A portion of the Adams Branch Station at Lind, Wash., showing winter-wheat plats and 
the method of seeding roadways to prevent soil blowing. 
than that at Moro. At Nephi this record was kept since 1908 and 
at Moro since 1911. Table 3 shows the average evaporation from a 
free water surface at each of the two stations. 
TaBLe 3.—Average monthly evaporation from a free water surface in the seven months 
from April to October, inclusive, at Moro, Oreg..and Nephi, Utah, for the years stated. 
Average evapora- Average evapora- 
tion (inches). tion (inches). 
Month. 
Month. Moro, Nephi, Moro, Nephi, 
Oreg., Utah, Oreg., Utah, 
1911 to 1908 to 1911 to 1908 to 
1920. 1920. 1920. 1920. 
Se Se ee 4. 65 4-719 .\\, Septemiber - 255 2-6 --.---=- =. 4.63 6. 330 
iS. ee eee 6. 57 Ba sion| POCtOber: 221 236s Ae ee 2. 81 3. 403 
LETS 632 ee eee 8.16 8. 934 ——$—————SS 
enema eee A BL, Pe 9.71 9. 662 Pore S35. gee oe ee 44.88 48. 373 
oJ LETS oe ee ee 8.35 
9. 050 
