Lime recommendation is made on the basis of a . . . . . . . . inch furrow slice

Answer: Option C

The lime recommendation is made based on a 6 inch furrow slice. These are based on the pH goal.
The lime recommendation is defined as the amount of agricultural limestone or other basic material needed to increase the pH of the soil from an unacceptably acidic condition to a value that is considered optimum for the desired use of the soil.