In Louisiana large quantities of tankage, cotton-seed meal, and acid phosphate are used to fertilize cane-fields.
Manufacturers claim that sulphate of ammonia and tankage would be better.
tankage may be used in part, and in it the nitrogen costs very little more per pound.
More often the tankage provided is insufficient, and thousands of barrels escape.
If half the required nitrogen per acre, or 4½ pounds, is wanted in tankage, 50 pounds of the tankage will supply it.
The manufacturer gets his supply of phosphoric acid from rock, bone, or tankage exactly as does the home-mixer.