'. NTRY Dr. Karl D. Butler, Consultant to Ronald Graham, the Farm Editor. Farm and Food Dr. Butler Explains Formulas for Parity By DR. KARL D. BUTLER !parity price for beef cattle w An official reports just out $21.40 per indicates that the national ! The modern!zed par1ty form . . became effective on Jan. 1. 19 farm panty raho has dropped /for all commodities except whea to the lowest level since No- peanuts, cotton, and corn, su vember 1940. On Oct. 15, ject to the...