Table 3.

Standardized regression coefficients between strategies (independent variables) and model outputs (dependent variables).

Output	NEm_Req 1	Forage_TDN	PPI	Forage_Yield
Production
– Cycling in first 21 days	0.06	−0.02	−0.96	0.03
– Pregnancy percentage	0.03	−0.03	−0.59	0.05
– Calved in first 21 days	0.06	0.00	−0.77	0.03
– Cull cow age	0.04	−0.05	−0.51	0.08
– Replacement heifers required	−0.02	0.04	0.46	−0.03
– Actual weaning weight	−0.66	0.58	0.14	−0.07
– Supplement used per cow	0.71	−0.58	0.07	0.22
– Winter feed used per cow	−0.47	0.44	−0.12	−0.65
– Total purchased feed per cow	0.31	−0.15	−0.11	−0.86
Efficiency
– Grazing days per hectare	0.11	−0.39	0.07	0.84
– Kg weaned per cow exposed	−0.53	0.47	−0.31	−0.04
– Kg weaned per grazed hectare	−0.54	0.47	−0.27	−0.05
– Dry matter intake per kg weaned	0.65	−0.50	0.20	0.13
Economic
– Revenue per cow	−0.51	0.45	−0.14	−0.04
– Supplement cost per cow	0.70	−0.57	0.06	0.22
– Winter feed cost per cow	−0.35	0.32	−0.11	−0.47
– Purchased feed cost per cow	0.24	−0.15	−0.06	−0.32
– Replacement cost per cow	−0.22	0.20	0.37	−0.06
– Interest expense per cow	0.15	−0.09	0.04	−0.32
– Total variable cost per cow	0.15	−0.09	0.04	−0.31
– Returns per cow 2	−0.36	0.27	−0.09	0.26
– Returns per grazed hectare 2	−0.36	0.28	−0.10	0.26
– Annual ROI	−0.35	0.27	−0.11	0.26

¹ NEm_Req = herd base net energy for maintenance requirement; Forage_TDN = forage TDN multiplicative factor; PPI = postpartum interval; Forage_Yield = forage yield multiplicative factor. ² Returns are calculated as revenue minus variable costs (i.e., returns over variable costs).