30 
Bulletin 57. 
Sulphate of potash..1058 pounds 
Muriate of potash.1098 “ 
Complete fertilizer. 985 “ 
Kainit.1048 “ 
Nothing. 896 “ 
Average of fertilized plots.1047 “ 
Average of unfertilized plots. 896 “ 
Gain from fertilization.14 per cent. 
Under ordinary prices this gain of fourteen per cent 
would just about pay the cost of the fertilizer, but it is 
•evident that part of the difference in crop is due to differ¬ 
ences in the character of the ground, so that it would be 
hardly safe to say that the whole of the gain of fourteen 
per cent was due to the fertilizer. 
IV. SUGAR BEETS. 
A —SUBSOILING FOR SUGAR BEETS. • 
A test was made of the effect of subsoiling the land for 
sugar beets as compared with simple plowing. The subsoil¬ 
ing was done with a Secretary plow to the depth of fourteen 
inches, the rest was plowed eight inches deep with a com¬ 
mon stirring plow. The field was divided into six equal 
strips, alternately plowed by the two methods. The field 
was subsoiled in May and planted the same day. The re¬ 
sults are given in the following table: 
Plot. 
Treatment. 
Crop Per 
1 
Plowed 
2960 
2 
Subsoiled 
6880 
3 
Plowed 
5860 
4 
Subsoiled 
4554 
5 
Plowed 
4040 
6 
Subsoiled 
4400 
The average of the three plots merely plowed is a crop 
of 4287 pounds of sugar beets, while the three plots subsoiled 
gave a crop of 5278 pounds. This is an apparent increase of 
23 per cent as the result of subsoiling. 
A second trial made in the same way with four plots 
gave 
Plot. 
Treatment. 
1 
Plow r ed 
2340 
0 
Subsoiled 
2300 
3 
Plowed 
1470 
4 
Subsoiled 
1956 
The average of the plowed plots is 1905 pounds and of 
