i 8 The Colorado Experiment Station 
the plots which give the best returns had in every case received a 
dressing of farmyard manure at the rate of 20 tons per acre. While 
I do not consider this season’s results at all satisfactory and do not 
intend to discuss them, I will simply point out that the interpreta¬ 
tion of these results would be very difficult, viz., plots 17 and 24, 
both in the west half of the field, received the same kinds of fertil¬ 
izers except that 17 had received a dressing of stockyard manure; 
plot 17 yielded 21.9 tons to the acre and 24 yielded 13.1 tons. I 
think it wholly unsafe to argue that this difference in the yield was 
due to the stockyard manure. In the other pair of experiments, in 
which the same fertilizers were employed, we have a difference, it 
is true, in favor of the combination of stockyard manure and min¬ 
erals but in this case the difference is only 0.4 of a ton, besides the 
yields are very small, 9.3 and 8.9 tons per acre. 
If we consider the percentage of sugar in the beets we do not 
find the results much more satisfactory. There is in this respect 
one thing evident, namely, that in regard to the percentage of sugar 
the east half was the better without any relation to the fertilization. 
We cannot justly state, so far as these experiments go, that the fer¬ 
tilizers have either increased or decreased this factor in the crop, or 
rather we can show either according to our choice of samples. These 
unsatisfactory results cannot be attributed to a different history for 
the two portions of the field, nor to differences in preparation, in 
time of planting, irrigation, cultivation, harvesting or testing, nor 
yet to hail, to insects, or to fungi which attacked or injured one half 
more than the other. 
These experiments were repeated in 1910 on the same ground 
with but little variation in details and none in the plan of experi¬ 
mentation. The results are tabulated below. In 1909 twelve of 
the plots, six in either half, were dressed with stockyard manure at 
the rate of 20 tons to the acre or 10 tons to each half-acre, but no 
stockyard manure was applied in 1910, neither was the application 
of either the burnt lime or waste lime repeated in 1910, as the respec¬ 
tive plots had received 4, 10 and 20 tons of these matrials per acre 
in 1909. The west half of the field received the same treatment as 
in 1909 except as already stated. The numbers are the same as 
before, 12-25 inclusive represent the west and 26-39 the east half. 
This year again the results show a better yield on the west than 
on the east half, but the difference is much less than in 1909. The 
beets from the east half, however, are not richer in sugar than those 
from the west half as they were the preceding season. Plots 16 and 
iy produced the heaviest crops of beets and sugar in both years, 
while plots 14 and 15 rank close to them. It is a question in my 
mind whether this may not be due to differences in the productive¬ 
ness of the different plots rather than to the effects of the fertilizers 
