H. Mackenzie

The Effects of Soil pH on Elymus Repens Growth and Tissue Nutrients

J. Dekker, K. Chandler, H. Mackenzie, 2011 .

Ammelide and ammeline as non-protein nitrogen supplements for sheep.

H. Mackenzie, I. V. Rensburg, 1968 .

Melamine for sheep

H. Mackenzie, 1966 .