When Kentucky farmers finish stripping the 1963 tobacco crop they will have 176,000 tons of tobacco stalks worth $2 million on their farms.
These stalks will contain 9.8 million pounds of nitrogen, 932,000 pounds of phosphorus (2 million pounds of P2O5) and 13 million pounds of potassium (15.6 million pounds of K2O). Equal amounts of these plant nutrients bought in commercial fertilizers in 1963 would have cost more than $2 million.
Corder, George D. and Miller, Harold F., "Tobacco Stalk Production, Value and Use" (1963). Agronomy Notes. 153.