<p>Hammond K. J. 2011. Methane emissions from ruminant livestock fed white clover and perennial ryegrass forages. PhD Thesis, Massey University, Palmerston North, New Zealand.</p>
<p><strong><a href="https://mro.massey.ac.nz/handle/10179/2853">Read more</a></strong> (external link)&nbsp;</p>