158 The Colorado Experiment Station 
European beets. The Lauchstaedt beets grown with a complete 
mineral manure, showed for the seven year average 0.06923 percent 
in the beet, and beets grown without any fertilizer showed as an 
average for the same period 0.05479 percent. The samples given by 
Strohmer and Fallada with and without fertilizers give an average 
of 0.07155 percent in the beets. A few of our samples are as rich 
or richer even than these averages indicate, but the greater number 
of them are materially lower. The percentages of dry substance 
and its ash content together with the percentage of phosphoric acid 
in the pure ash are the factors which give us these figures. In our 
beets these factors are different from those of the European beets. 
The percentage of dry substance in our beets is materially lower, as 
a rule, the ash is somewhat higher, the phosphoric acid in the pure 
ash is very much lower. In the analyses of pure ashes given by 
Strohmer and Fallada, the lowest percentage given for phosphoric 
acid and calculated on the pure ash is 12.53 and the highest is 19.66. 
Of 50 .idles of Colorado beets analyzed in connection with this bul¬ 
letin, only two have shown in the pure ash as much as 12 percent of 
phosphoric acid, these contained 12.515 and 12.076. The average 
of the 5 j determinations using the nearest whole figure in the second 
decimal place is 6.78 percent. It is just to state that 13 of these 
samples were grown on very bad ground, but when these beets have 
been deducted, the average is only 8.07 percent, while the average 
of the Strohmer-Fallada samples is 15.6 percent. The pure ash of 
the Montana beet analyzed contained 16.536 percent. 
The potassic oxid in our beets is higher than in the European 
beets. In these latter its average is not far from 0.17 percent, 
while in ours it is seldom as low as 0.22 and reaches as high as 0.54, 
ranging mostly between 0.26 and 0.44. 
In regard to the sodic oxid nothing can be said, it seems to be 
as erratic in the European beets as in ours, and without relation to 
the sugar in the beet. 
Our beets contain very little lime, usually a trifle over one-half 
as much as the European beets, but they contain rather more mag¬ 
nesia. The ratio of these two substances in the European beets is 
approximately 1:1, the calcic oxid being slightly in excess, but with 
our beets this ratio is approximately 1 :2. 
The chlorin is extremely variable in the ashes which can some¬ 
times, but not always, be attributed to the presence of a large amount 
of it in the soil. 
Among the subordinate constituents we often find less iron and 
alumina than is given for the European beets; on the other hand, 
manganese is seldom if ever given in their analyses. I do not re¬ 
member to have seen it given at all. Ruempler, Die Nichtzucker- 
stoffe der Rueben, p. 31, says “Caesium and Manganese have been 
