Feb. 9, 1924 
Effect of Fertilizers on Stem Rust of Wheat 
3&7 
Table XIII.— The effect of fertilizers on the height of plants in inches; on the yield , in 
kilograms , of seed and straw; and on the ratio of seed to straw , of Marquis in igiy in 
the commercial fertilizer plats on the Quinn farm , St. Paul, Minn. 
Straw height, seed and straw 
weight, and ratio of seed to 
straw. 
Fertilizer. 
Kind. 
Amount 
per acre. 
Pounds. 
Height of straw.... 
Weight of seed. 
Weight of straw.... 
Ratio, seed to straw 
Height of straw.... 
Weight of seed. 
Weight of straw.... 
Ratio, seed to straw 
Height of straw. ... 
Weight of seed. 
Weight of straw.... 
Ratio, seed to straw 
1, 000 
$00 
Height of straw.... 
Weight of seed. 
Weight of straw.... 
Ratio, seed to straw 
None. 
Fertilizer, kind and amount (pounds) per acre. 
Sodium nitrate. 
None. 
Sodium 
nitrate. 
1,000 
500 
250 
500 
500 
40 
44 
44 
35 
36 
3 2 
42 
40 
2. 2 
3*9 
2 * 5 
i *3 
2. 2 
2. 0 
3*6 
3*6 
12.8 
13-7 
11. 0 
6-5 
6.5 
5*3 
11. 7 
ii *5 
li: 5-3 
i: 3 - 5 
1:4.4 
1:5 
i **3 
l i:2 * 7 
1 ** 3*3 
1:3. 2 
39 
39 
45 
39 
39 
38 
42 
41 
3 -o 
2. 6 
3 *o 
2.7 
2.7 
2. 8 
3*9 
3*4 
9.9 
13. 8 
12.4 
8. 1 
8. 4 
8. 4 
12. 8 
12. 4 
li: 3*3 
i-’ 5*3 
1:4. 1 
1:3 
1:3. 1 
i *'3 
i: 3*3 
1:3.6 
40 
40 
36 
35 
35 
33 
36 
38 
3-3 
3*4 
2. 6 
1.9 
2.1 
2. 1 
3-6 
3*5 
12. 1 
10.3 
8. 4 
5-6 
6. 2 
5-9 
11. 1 
11. 2 
1:3* 2 
1:3 
1:3. 2 
1:2. 9 
1:3 
1:2. 8 
1:3. 1 
1:3. 2 
33 
39 
40 
33 
38 
37 
37 
37 
3 -o 
3*3 
3*3 
2. 6 
2. 7 
2 * 5 
3*4 
i *5 
10. 8 
ii *5 
10.5 
7*3 
7*4 
7 * 1 
11. 1 
11. 2 
.1:3*6 
1:3 
1:3.2 
1:2. 8 
1:2. 7 
1:2.8 
1:3.2 
i: 7*5 
500 
250 
500 
250 
Potassium chlorid. 
Fertilizer, kind and amount (pounds) per acre. 
The plants in the plats fertilized with sodium nitrate tillered better, 
were more vigorous, and yielded better than those on the plats which 
had received no nitrogen. The average yield from the nitrate plats 
was 35.8 bushels per acre, while that from those receiving no nitrogen 
was 25.8 bushels, a difference of ten bushels in favor of the plats fertilized 
with nitrogen. The ratios of seed to straw were quite uniform. The 
effect of sodium nitrate on yield was quite different from that in the plats 
on University Farm. Here there was a difference of 9.2 bushels in favor 
of the plats not receiving nitrogen, while on the Quinn farm there was a 
difference of 10 bushels in favor of the plats receiving nitrogen. Evidently 
the soil on the Quinn farm was deficient in available nitrogen, while that 
on University Farm was not. 
The data in Table XIV show also the correlation between the fertilizers 
applied and the percentages of “yellow-berry” and protein in the seed. 
The average percentages of yellow-berry and protein content of the seed 
for all plats which received applications of sodium nitrate are 14.5 per 
cent and 14.7 per cent, respectively, compared with 67 per cent and 12.8 
per cent, respectively, as the averages for all plats which received no 
