SPRING WHEAT ON THE NORTHERN GREAT PLAINS. 
35 
days in 1919 to 121 days in 1915. In general, the period from 
emergence to maturity is less in the northern than in the southern 
parts of the section, but the seasonal climatic differences, including 
precipitation, temperature, humidity, and wind, are the most impor- 
tant determining factors. The earlier the wheat is sown the longer 
will be the period from emergence to maturity. The average number 
of days from emergence to maturity of 38 varieties of spring wheat 
grown at 11 experiment stations in the northern half of the Great 
Plains area during three or more of the seven years from 1913 to 1919, 
inclusive, compared with Marquis wheat grown at the same station 
in the same years is shown in Table XV. 
Table XV. — Average time from emergence to maturity of 38 varieties of spring wheat 
grown at 11 experiment stations in the northern half of the Great Plains area during 
three or more of the seven years from 1913 to 1919, inclusive, compared with the Marquis 
variety for the same station years. 
Average time from 
Average time 
from 
emergence to ma- 
emergence to 
ma- 
e 
turity (days). 
Class, group, and 
variety. 
03 
turity (days). 
Class, group, and 
variety. 
i 
03 
a 
QD 
a . 
03 
O >> 
Differ- 
ence from 
Marquis. 
a 
03 
a 
a . 
o3 f 
^ 03 
O >> 
Differ- 
ence from 
Marquis. 
fc 
| 
+3 
03 
to 
.2 o 
c3*w 
1 
i 
o 
| 
"c3 
>> 
.2 
03 
.2 o 
3+3 
CTo3 
Sh -^ 
03 w 
03 
"c3 
O 
w 
> 
s 
H 
vl 
O 
02 
> 
a 
H 
h3 
COMMON. 
DURUM. 
Fife: 
Kubanka: 
Marquis 
Ghirka Spring. 
3641 
1517 
56 
42 
94.8 
96.9 
5284 
3310 
15 
6 
91.3 
82.2 
88.1 
87.3 
*5."i' 
3.2 
96.5 
0.4 
Algeria 
Glyndon 
2873 
42 
98.6 
95.7 
2.9 
Arnautka 
1493 
20 
97.6 
95.5 
2.1 
Kitchener 
4800 
3697 
3 
49 
91. 
97.2 
91.7 
94.1 
0.7 
'3.T 
Do... 
4064 
1520 
46 
17 
97.8 
101.9 
94.4 
100.1 
3.4 
Power 
Beloturka 
1.8 
Red Fife 
3329 
7 
100.1 
95.2 
4.9 
Buford 
5295 
9 
94.8 
92.7 
2.1 
Ruby 
6047 
4 
82.8 
87.7 
4 9 
Kubanka 
1440 
51 
98.3 
95.8 
2.5 
Rysting 
Bluestem: 
3022 
26 
101.9 
98.1 
3.8 
Do .. 
1516 
4063 
17 
32 
96.6 
96.6 
93.9 
93.3 
?. 7 
Kubanka No. 8 
3.3 
Crossbred 
3314 
7 
101.6 
95.2 
6.4 
Marouani 
1593 
9 
100.2 
96.8 
3.4 
Dakota 
3083 
8 
98.4 
94.8 
3.6 
Mindum 
5296 
4 
89.5 
85.7 
3.8 
Haynes 
2874 
47 
98.2 
93.6 
4.6 
Monad 
3320 
21 
96.0 
93.3 
2.7 
Preston: 
Pierson 
4163 
6 
90. 
87.3 
2.7 
Converse 
4141 
14 
96.9 
98.3 
1.4 
Erivan 
2397 
17 
92.8 
97.3 
4.5 
Red Durum: 
Fretes 
1596 
4324 
7 
34 
105.7 
90.9 
107. 
95.2 
1.3 
4.3 
D-5.. 
3322 
18 
94.4 
92. 
2.4 
Pioneer 
Preston 
3081 
50 
94.3 
93.5 
.8 
Peliss: 
Ladoga: 
4935 
18 
95.4 
95.5 
.1 
Peliss 
1584 
26 
102.1 
99.6 
'?, 5 
Huron 
Laramie 
6235 
4 
91.7 
91.3 
.4 
Miscellaneous: 
Manchuria 
2492 
16 
93.6 
95.3 
1.7 
Golden Ball. . . 
6227 
4 
89. 
84. 
5.0 
Norka 
4377 
7 
97.4 
94.6 
2.8 
Miscellaneous: 
Prelude 
4323 
36 
85.4 
95.4 
10.0 
Galgalos 
2398 
19 
99.1 
100. 
.9 
The Prelude and Ruby varieties are the earliest which have been 
grown in these experiments, being 10 days and 4.9 days, respectively, 
earlier than Marquis wheat. Power Fife is 3.1 days later than Mar- 
quis on the average, although in certain instances in comparable 
experiments it has ripened on the same day. Haynes Bluestem has 
matured from 1 to 10 days later than Marquis, and during 47 station 
