Feb. 9, 1924 
Effect of Fertilizers on Stem Rust of Wheat 
369 
kind of fertilizer applied to each, the percentages of stem rust, yellow- 
berry and seed shriveling, and the yield in bushels per acre are given in 
Table XV. 
Table XV.— The disposition of the commercial fertilizer plats and the effect of the 
fertilizers on the percentages of stem rust, yellow-berry and seed shriveling, and on yield 
in bushels per acre for Marquis wheat, at Anoka, Minn., in igiy 
Infection, yellow-berry, seed shriveling 
and yield. 
Percentage of stem rust. 
Percentage of yellow-berry... 
Percentage of seed shriveling. 
Bushels per acre.. 
Percentage of stem rust. 
Percentage of yellow-berry... 
Percentage of seed shriveling. 
Bushels per acre. 
Percentage of stem rust. 
Percentage of yellow-berry... 
Percentage of seed shriveling. 
Bushels per acre. 
Fertilizer. 
Kind 
Percentage of stem rust. 
Percentage of yellow-berry... 
Percentage of seed shriveling. 
Bushels per acre. 
03 
H 
l/> 
O 
A 
PU 
Amount 
per acre. 
Pounds■ 
2,000 
1,000 
5 °° 
None. 
Fertilizer, kind and amount (pounds) per acre. 
Sodium nitrate. 
1,000 500 250 
IS 
45 
30 
24.1 
15 
30 
15 
41.7 
17 
!5 
40 
23-8 
16 
o 
o 
13-4 
II 
50 
20 
33-3 
11 
60 
15 
20.1 
13 
75 
20 
28.3 
17 
70 
30 
22.4 
10 
70 
25 
23.2 
12 
90 
1 5 
24.4 
10 
98 
o 
27-3 
16 
90 
o 
23.1 
None. 
II 
65 
15 
! 9 - 
8 
90 
o 
14.9 
15 
95 
o 
8 
95 
o 
22.2 
15 
35 
o 
15-2 
12 
90 
o 
14-515-1 
II 
95 
o 
13.6 
13 
95 
o 
12.2 
9 
60 
o 
23.0 
12 
60 
20 
14.0 
12 
60 
o 
14. 
9 
75 
o 
18.3 
Sodium 
nitrate. 
500 500 
83 
14 
25 
40 
29-3 
15 
40 
20 
32.0 
14 
75 
15 
4-8 
15 
55 
o 
27-5 
500 250 500 250 
13 
75 
i 5 
25-1 
18 
40 
i 5 
3 i -4 
15 
75 
20 
28.0 
16 
75 
i 5 
33-8 
Potassium chlorid. 
Fertilizer, kind and amount (pounds) per acre. 
The percentages of stem rust in these plats at Anoka varied but little 
(Table XV). The percentages of yellow-berry and seed shriveling were 
affected by fertilizers about as they were in die preceding experiments. 
The yields were increased by nitrogen much as they were on the Quinn 
farm. The average yield for all plats receiving applications of sodium 
nitrate was 27.4 bushels per acre, and for all plats receiving none, it was 
16.4 bushels, a difference of 11 bushels in favor of the plats receiving 
nitrogen. The data obtained from this experiment tend to show that 
stem rust was affected but little, even though the morphology and 
physiology of the wheat plants were affected considerably by fertilizers. 
GENERAL OBSERVATIONS, 1918 TO 1922 
After 1917, observations were made on permanent tenth-acre tripli¬ 
cated plats of the division of soils of the University of Minnesota, at the 
Crookston substation, and observations were made one year on similar 
