1. The effects of feeding plant materials on feed efficiency and gas emissions in dairy cattle Open Access Author: Heilman, Stephanie P. Title: The effects of feeding plant materials on feed efficiency and gas emissions in dairy cattle Area of Honors: Animal Sciences Keywords: essential oilssecondary plant metabolitesoreganorumendairy cattle File: Download Thesis_Stephanie_Heilman.pdf Thesis Supervisors: Gabriella Anne Varga, Thesis SupervisorGabriella Anne Varga, Thesis SupervisorTroy Ott, Thesis Honors Advisor