20 The Colorado Experiment Station 
K 2 0, superphosphate, total phosphoric acid 13.19 percent, water- 
soluble 8.35 percent, citrate soluble 2.11 percent. The waste lime 
carried potash 0.27, phosphoric acid 1.90, and nitrogen 0.075 P er_ 
cent. Ten tons of this lime carried 380 pounds of phosphoric acid, 
50 pounds of potash and a small amount of nitrogen. The burnt 
lime was practically pure and its action as a fertilizer would be that 
of caustic lime. Our soils are already alkaline so there would be no 
soil acidity to correct and its benefit if any would probably be attrib¬ 
uted to its action on the potash minerals or on the organic matter in 
the soil. 
The composition of the stockyard manure is sufficiently indi¬ 
cated by its content of nitrogen, potash and phosphoric acid which 
was as follows: nitrogen 0.598, potash 0.89 and phosphoric acid 
0.82 percent and a ten-ton dressing of such manure added to each 
half-acre, nitrogen 119.6 pounds, potash 17.8 pounds, and phos¬ 
phoric acid 16.4 pounds. In addition to these and probably of con¬ 
siderable importance, is 2,800 pounds of organic matter which is 
finely divided and easily incorporated with the soil. 
The crops of 1910 ought to show the residual effects, if any, 
of the 1909 applications, plus that of the applications of 1910. There 
was applied to plot 28 for instance in 1909, P. 55, K. 65, N. 100, 
CaO 2 tons; in 1910, P. no, K. 130 and no nitrate or lime, but the 
effects of the lime applied in 1909 should still be felt in 1910. The 
crop in 1909 was 9.3 tons per acre, in 1910 11.9 tons, an increase of 
2.6 tons. In the case of plot 15 there were added in 1909, 10 tons 
stockyard manure, K. 65, N. 100, in 1910 the same except that no 
manure was added. In 1909 the crop was 15.2 tons, in 1910 14.2 
tons, a slight decrease in crop with practically the same percentage 
of sugai. 
The results obtained in these two years, 1909 and 1910, show r 
a slight benefit accruing from the application of the fertilizers. The 
results are, however, so irregular, whether we estimate the benefits 
in tons of beets or pounds of sugar per acre, that the application of 
fertilizers does not commend itself. We usually, in discussing a 
subject of this kind, consider the more favorable results, as they tend 
to show the possibilities of the practice, and excuse less favorable 
ones on a variety of grounds. We also are apt to take tonnage of 
beets as our measure of the effects produced, but the amount of 
sugar produced is a much better one. In 1909 we had only four 
plots that produced 4,000 or more pounds of sugar per acre. The 
maximum yield was 5,825 pounds. The plot that produced this 
showed an exceptionally high tonnage, 7.3 tons more than the next 
best yield. The fertilizers applied to this plot were phosphoric 
acid, P 2 Or, 7.2 pounds, potash IC 2 0 31.72 pounds and nitrogen N. 
13.60 pounds, burnt lime 2 tons, with 10 tons stockyard manure 
