134 
The Coeorado Experiment Station 
ANALYSES OF BEETS. SEASON 1911. 
CXLVIII 
CXLIX 
CL 
CLI 
Variety . 
E R 
E R Check 
Z R 
Z R Check 
Date of sampling. 
26 Oct. 
26 Oct. 
26 Oct. 
26 Oct. 
Nitrate applied per acre. 
. 750 pounds 
None 
750 pounds None 
Average weight of beets. 
. .877.3 gram 1030.0 grams 
915.0 grams 
776.8 grams 
Av. weight of beets, trimmed. 
.708.8 grams ! 
572.5 grams 
760.7 grams 
661.8 grams 
Percent 
Percent 
Percent 
Percent 
Sugar in beets. 
. 14.50000 
16.10000 
15.10000 
16.70000 
Coefficient of purity. 
. 78.40000 
81.30000 
80.70000 
83.50000 
Dry substance. 
. 20.92000 
22.56000 
21.37000 
23.52000 
Total nitrogen. 
0.18678 
0.14850 
0.16830 
0.12276 
Proteid nitrogen. 
0.09319 
0.08579 
0.08765 
0.08104 
Ammonic nitrogen. 
0.00198 
0.00079 
0.00449 
0.00198 
Amid nitrogen. 
0.01135 
0.00647 
0.00515 
0.00264 
Amino nitrogen. 
0.03266 
0.03929 
0.03190 
0.03848 
Nitric nitrogen . 
0.02270 
0.00600 
0.01444 
0.00253 
Press Juice According 
to Rucmpler. 
Total nitrogen. 
0.17036 
0.13236 
0.15074 
0.11030 
Albumin nitrogen. 
. 0.05956 
0.05564 
0.05491 
0.04927 
Propetone nitrogen. 
0.01176 
0.00025 
0.00490 
0.00245 
Peptone nitrogen . 
9 
0.00392 
0.00416 
0.00417 
It would possibly be better to discuss the analyses of the 1911 
samples just given in the next paragraphs, but I shall postpone this 
to make place for some other analyses. 
THE EEEECTS OE DEFOLIATION. 
Our efforts in 1910 to obtain some definite measure for the 
effects of leaf-spot upon the yield and general qualities of beets did 
not give us results which could be interpreted as conclusive of any¬ 
thing though we obtained the record of 127 fields. We found that 
many of these fields gave good yields of both beets and sugar and 
we could discover no relation between the severity of the attack and 
either the yield of the beets or the percentage of sugar. We did, 
however, observe that low yields of beets seemed to be associated 
with higher percentages of sugar. While this was generally true it 
was not always so. Beets from one section of the valley (Arkan¬ 
sas) could not be compared with those from other sections from the 
same valley for higher yields and percentages were the rule in some 
sections as compared with others. 
An instance was given of a field which had been very severely 
attacked, the date of the attack is not known to me, but the field 
samples showed 16 or more percent of sugar, though the foliage 
was practically all destroyed. I take it that the injury caused by 
leaf-spot is due to its destruction of the leaves. 
The data at my command relative to the effects of defoliating 
beets are not concordant. The results probably vary greatly with 
the stage of development of the beet, the age of the leaves removed, 
their number, etc. The leaf-spot destroys the oldest leaves first and 
the young leaves escape the attack for some time or altogether. This 
was markedly the case with our nitrate beets in 1910; so much so, 
