\ 
SPRING CEREALS AT MORO, OREG. 7 
which occur during the late spring, summer, and autumn months are 
of such a nature that practically all of the water is absorbed by the 
soil, but much of the winter precipitation is frequently lost as run-off. 
As is shown in Table II, the wettest months are November, December, 
and January. Much of the precipita- 
tion during these months is usually in 
the form of snow. 
The 1 1-year average precipitation by 
months is shown graphically in figure 5. 
The precipitation available for grow- 
ing cereals during any particular season 
in this section is largely that which 
falls from September 1 to August 31. 
In comparing crop production with 
precipitation data, therefore, records 
for calendar years are not so valuable 
as those for crop years ending August 
3 1 . The precipitation which falls dur- 
ing the growing season is also an im- 
portant factor in influencing crop yields . 
The average seasonal precipitation for 
small grains (March to July, inclu- 
sive), as shown in Table III, is 3.83 
inches. 
Table III gives precipitation records 
for each of the five crop years for which 
results are reported in this bulletin, 1911 to 1915, inclusive, and also 
the precipitation for the growing season in each of those years. 
Table III. — Precipitation at Moro, Oreg., in crop years (ending Aug. SI) and in the 
growing season (March to July, inclusive) , for five years, 1911 to 1915, inclusive. 
^M 
H/6V5 5 
/^3. 
nnrmn i 
AV4/P. 
*/=>/?. 
H.£t? 
May 
^k/.<30 
c/£//VS£" 
M- ss 
<soA.r 
I.X5 
*t/G. 
M.&0 
SSP7: 
MBf 
0077 
/V*?K 
S/^? 
0£-C. 
M/.&-? 
Fig. 5.— Diagram showing the average 
monthly precipitation in inches at Moro, 
Oreg., during the 11 years from 1905 to 1915. 
Period. 
Inches. 
Period. 
Inches. 
Annual: 
Sept. 1, 1910, to Aug. 31, 1911 
8.47 
14.19 
11.08 
12.53 
13.31 
Seasonal : 
Mar. 1 to July 31, 1911 . . 
2.29 
Sept. 1, 1911, to Aug. 31, 1912 
Mar. 1 to July 31, 1912 
3.24 
Sept. 1, 1912, to Aug. 31, 1913 
Mar. 1 to July 31, 1913 . . . 
5.06 
Sept. 1, 1913, to Aug. 31, 1914 
Mar. 1 to July 31, 1914 
3.67 
Sept. 1, 1914, to Aug. 31, 1915 
Mar. 1 to July 31, 1915 
4.91 
Average 
Average 
. 11.92 
3.83 
It will be observed that the crop year of 1912, from the standpoint 
of precipitation, was the most favorable for crop production of any 
of the five years for which data are here given. The crop year of 1911 
was very unfavorable, the total precipitation being only 8.47 inches, 
of which, only 2.29 inches fell during the growing season. The 
average for the five years ending August 31 is 0.57 inch more than 
