90 The Colorado Experiment Station 
spectively as nitrates, or if we consider the nitrate to be sodic nitrate 
it gives us 3.4 pounds of sodic nitrate per each 100 pounds of sugar 
in these beets. The beets represented by Analysis XX were grown 
without the application of any kind of a fertilizer and we find the 
injurious nitrogen equal to 1.072 parts per 100 of sugar and the * 
nitric nitrogn equal to 0.3555, almost exactly one-third of the in¬ 
jurious nitrogen and each 100 pounds of sugar in these beets was 
accompanied by 2.133 pounds of sodic nitrate. These are the maxi¬ 
mum quantities found in these classes of beets, but they are very 
large, and we are certain that this was due in the one case to an appli¬ 
cation of 1,000 pounds of sodic nitrate per acre. The other also, 
though no nitrate was applied, must have had an excessive supply 
furnished by the soil itself as there is no evidence that the nitric 
acid is formed in the beet. An examination of our results shows 
our beets to contain from 0.032 which is our very lowest up to 3.4 
parts of nitrates calculated as sodic nitrate for each 100 parts of 
sugar. The French beet previously mentioned as carrying 16.8 per¬ 
cent of sugar and 0.049 percent if nitric nitrigen, carried only 1.760 
parts of sodic nitrate to 100 of sugar, which is only one-half as 
much as our maximum quantity. The sodic oxid in the ashes of 
these beets grown with nitre is very high, reaching a maximum of 
about 40.0 percent of the pure ash and nearly 0.25 percent of the 
weight of the fresh beet. It is lowest in the Michigan beet, of which 
it constitutes about 0.002 percent of the beet. It is likewise quite 
low in our Fort Collins standard beet and in those grown on new 
sod land at Holly, but is fairly high in those grown on the College 
Experiment Farm in 1911, 0.05 percent of the beet, and decidedly 
high in those grown in 1910, 0.129 percent. The chlorin in the 
beets grown on our plots with fertilizers is very high, constituting 
15 to 19 percent of the pure ash, that this may have been the carrier 
of the sodium is probable, but whatever the cause the sodic oxid is 
quite high. The lands on which these beets were grown are, as 
repeatedly stated, good lands and not seeped, alkalized lands, sur¬ 
charged with salts which may be considered injurious to vegetation. 
The maximum amount of chlorin found in the soil on which the 
experiments with fertilizers were made, was 0.038 percent for the 
total chlorin. The water soluble chlorin ranged from 0.008 to 0.021 
percent, the latter was found in the third foot of soil. Beets grown 
with sodic nitrate are always relatively rich in chlorin. 
The water-soluble in this soil is not exceptionally high for arid 
lands ; the surface foot showed 0.10 and 0.18, the second foot 0.32 
and 0.35 and the third foot 0.81 and 0.90 percent for two series of 
samples. These figures for the second and third foot, samples taken 
subsequently, were much higher. The water-soluble in this case is 
largely calcic sulfate. Our former studies of the sugar beet have 
