"Livestock Nutrition Exam 2026: Comprehensive Guide to Mastering Feedstuffs and Additives"

Rye grain typically contains crude protein in the low-teens on a dry matter basis, usually around 12–14% CP. Among the options, 13% CP sits right in that common range, making it the best approximation. The other values fall outside the typical rye protein level: 9% is too low for a cereal grain, 11% is modestly low for rye, and 15% would be higher than what rye usually provides. Remember these values are reported on a dry matter basis, so moisture can shift the as-fed percentage, but 13% is a solid practical estimate for rye.