
Fig. 1. Linear regressions (P
0.01) of rumen escape N (g kg-1 N) on (A) heating degree days >35°C, (B) 30-d average temperature, and (C) maximum internal bale temperature. Data from 1998 are represented by
; data from 1999 are represented by
. In each case, intercepts associated with regression lines for 1998 and 1999 differed (P < 0.0001), but slopes did not (P
0.638).