iq 8 The: Colorado Experiment Station 
modify the action of the nitrates, this action has not been obliterated 
or so far modified as to be rendered in the least doubtful. It will 
be noticed that the maximum effect was produced by the application 
of 1,000 pounds per acre, which is a small quantity compared with 
the quantities which we have found in many of our soils. We will 
support these analytical data in subsequent paragraphs by experi¬ 
ments showing the factory quality of these and other beets grown on 
bad ground and sold to the factory, in other words, commercial 
beets. We will, however, next consider the analytical results ob¬ 
tained with beets grown on bad ground. These results, like the 
preceding, have already been presented in detail. The first group 
of i esults pi esented the effects of the soil itself without any attempt 
to modify them by fertilizers. This soil was already known to me 
as one rich in nitrates and further, one in which the nitrates were 
not only spreading but the accumulation had already become so 
great in portions of it as to exterminate the Azotobacter. The order 
of these samples proceeds from the best to the worst portion of the 
field. The samples were harvested 3 Nov. 1910. 
No. 
1 
2 
4 
Total 
Nitric 
Injurious 
Sugar 
Nitrogen 
Nitrogen 
N per 
Percent 
Percent 
Percent 
100 Sugar 
13.2 
0.24930 
0.01936 
1.02880 
11.3 
0.15995* 
0.03249 
0.73900 
12.1 
0.23345 
0.05370 
1.04790 
8.6 
0.34510 
0.08337 
2.04840 
Injurious 
Ash per 
100 Sug. 
5.6292 
6.7379 
7.9285 
13.4330 
The next group presents the results produced by superphosphate 
applied at the rate of 1,000 pounds per acre. The order of the sam¬ 
ples has the same significance as in the preceding group and repre¬ 
sent corresponding sections as is the case with the succeeding table. 
No experiments were made with section four. 
Total Nitric Injurious Injurious 
No - Sugar Nitrogen Nitrogen N per Ash per 
Percent Percent Percent 100 Sugar 100 Sug. 
1 . 10-9 0.25860 0.04982 1.41290 7.1557 
2 . n - 8 0.24350 0.04621 1.40770 6.4939 
6 . 10.2 0.30675 0.07260 1.78290 9.0421 
I he supei phosphate has under the conditions obtaining in this 
soil produced decidedly bad results. The contrary to what we had 
expected. If the check rows had been separated from those treated 
^ ith supei phosphate by a space of even thirty feet we would try to 
believe tnat the action of the phosphate was in this case just what it 
lias proven to be in many other experiments, but that some other 
factoi had brought about the results. We have, however, no ex¬ 
planation, not even the size of the samples, to modify the conclusion 
that the action of the phosphoric acid was decidedly bad. All of the 
beets suffered from attack by leaf-spot, but all suffered alike and the 
*Other samples representing this section of the field taken 23 Sent and 11 
SSffiSrSiS&WdKl a " d " itrlC nitrog " e " 0 '» 3 ' 480 
