Wool growth responses in Drysdale and high and low staple tenacity Romney sheep to nutrient supplementation in autumn

Maintenance diets containing two levels of energy (9.6 v. 11.5 MJME per kg DM ) and two levels of protein (10.7 v. 2 1.7 g nitrogen per kg DM) were fed to four groups, each of ten Romney (five low and five high staple tenacity) and four Drysdale yearling rams, for six weeks