364 Journal of A gricultural Research voi. xiv, no. 9 
not as productive as that on which the plants were grown in 1914 and 
1915 - 
Data on rainfall and temperature are given in Table I. It is neces¬ 
sary to keep in mind the weather conditions during the growing season 
for each of the four years in order to interpret correctly the results of 
the work. 
Table I .—Normal rainfall and temperature, 1873-1903, with monthly deviations for 
the growing seasons IQ14-1917 , inclusive, Minneapolis, Minn . 
Rainfall. 
Temperature. 
Year. 
April. 
May. 
June. 
July. 
Au¬ 
gust. 
April. 
May. 
June. 
July. 
Au¬ 
gust. 
j In ekes. 
Inches. 
Inches. 
Inches. 
Inches. 
°F. 
°F. 
°F. 
°F. 
°F. 
Normal. 
/1873- 
V903 
} 2- 50 
3 * 20 
3*70 
4. 20 
3 * 70 
47*0 
59 *o 
63.0 
72.0 
70.0 
Deviation from normal. 
1914 
+ 1. 25 
—2.12 
+4.62 
— 2. 64 
4 -s-oi 
— 1. 6 
4-2* 9 
- .8 
4 - 3*3 
“ *5 
Do. 
1915 
- -57 
4 - . 06 
+ .90 
4 * 2 . II 
— . 20 
4 - 9*3 
4-5. 2 
— 4*9 
—4. 6 
—4.1 
Do. 
1916 
4 - .63 
4 - 3 -os 
4 - • 53 
-2. 54 
— 2. 03 
“ 3*0 
“ *4 
- 4*3 
4-6.9 
4-2.4 
Do. 
1917 
— -74 
4 - *32 
— .24 
+ .25 
- .86 
“ 1*5 
— 2. 7 
— 3*8 
4 - .9 
— 2. 1 
1914. —Seeds were planted on April 19 and some additional ones to 
make a more desirable number a few days later. Plants were harvested 
on August 4. With a temperature above normal for May and a rainfall 
2 inches below the average, the plants made a luxuriant growth as to 
height, but produced only a moderate number of tillers. The abundant 
rainfall and approximately normal temperature of June were favorable 
for growth, which was checked prematurely by the high temperature 
and drought during early July. The latter part of July and early August 
were very wet and stemrust (caused by Puccinia graminis tritici) appeared 
on the plants when the kernels were in the milk stage. This resulted in 
a shriveling of practically all of the kernels. 
1915. —Seeds were planted on April 19. Plants were harvested on 
August 17. The approximately normal rainfall for April and May, 
with the exceptionally favorable temperature, allowed the plants to 
make a luxuriant growth both as to height and tillering. Abundant 
rainfall during June and July with continued cool weather made condi¬ 
tions ideal for development in the late stages of growth. Stemrust was 
present in small amounts as the plants reached maturity, but did no 
damage that could be detected. 
1916. —Seeds were planted on April 27. Plants were harvested on 
August 4. The rainfall was above normal for May and June, with the 
temperature approximately average during May and considerably below 
normal for June. In July the weather was dry and hot, conditions which 
hastened maturity and "caused a moderate shriveling of some of the 
kernels. 
