io6 The Colorado Experiment Station 
50.0 percent. As I have elsewhere stated, we have, with the appli¬ 
cation of 500 pounds of sodic nitrate per acre, clearly reached the 
limit of its beneficial action and probably passed it and as clearly 
passed the limit of profit. I have made this digression from the 
orderly presentation of our results because of the exceptional results 
obtained by the application of 250 pounds of sodic nitrate per acre 
to this land 
While the table presents our best samples of beets for 1910, it 
will be recognized that they show a strong tendency toward low per¬ 
centages of sugar, high percentages of nitric nitrogen and high 
ratios for the injurious nitrogen and injurious ash per 100 of sugar. 
Some of them, moreover, are reasonably high in total nitrogen, and 
the ratio of the total nitrogen to the injurious nitrogen per 100 of 
sugar varies from 2.5 in the best Colorado sample to about 3.0 in the 
others. It is clearly stated in the table that these best samples in¬ 
clude some grown with fertilizers, but those grown with fertilizers 
are not better than those grown without them, sample No. 3 ex¬ 
cepted, for which reason I have ventured to include these best sam¬ 
ples in one table, which exhibits the best results obtained in 1910 
without fertilizers on well conditioned land from both the physical 
and chemical standpoints, as well as the best results obtained with 
fertilizers on the same kind of land. 
The following table presents some further results obtained with 
combinations of potash, phosphoric acid, and nitrogen. The tables 
previously given state these results more in detail but the data here 
given serve our present purpose better. All of these experiments 
were carried out at Rocky Ford in co-operation with the American 
Beet Sugar Company and all of these samples were harvested 11 
Oct. 1910. 
There was no plot in this series to which sodic nitrate alone 
had been applied. None of these samples shows any betterment in 
quality due to the fertilizers used and neither the yield nor the 
percentage of sugar was improved. On the contrary, it was, in the 
main, depressed. The total nitrogen in two cases is rather high, in 
the other cases it is only moderately so. The nitric nitrogen, the 
injurious nitrogen and the injurious ash are quite high. The nitric 
nitrogen is lower in four cases than in the check sample, which is 
No. 5 in the preceding table. The injurious ash has been decidedly 
increased and while the potash and phosphoric acid applied separate¬ 
ly seem to have depressed the injurious nitrogen, it was increased in 
all of the other samples. I have already stated that I believe that 
variations in the properties of the soils of these half-acre plots is a 
factor which ought not to be left wholly out of our reckoning. 
We have given among our best beets two samples grown with 
the application of sodic nitrate 250 and 500 pounds respectively. 
