Tankage
Categories:
COMMERCIAL SOURCES OF PLANT-FOOD
The waste from the slaughter of animals goes into a product
called tankage. The refuse is cooked for removal of the fat, and then
ground. It may run high in nitrogen on account of the amount of meat in
the mixture, and it may be low in nitrogen and very high in phosphoric
acid by reason of the large amount of bone in the mixture. Only a
guarantee of analysis affords safety to the buyer. It is a relatively
slow and good fertilizer, and is used usually in connection with forms
of plant-food that are more quickly available.