Dr B P Louw, Director, and Mr W A Berry, Deputy Director, in the KwaZulu-Natal
Department of Agriculture and Environmental Affairs, for commissioning this
work, as well as for their encouragement and support.
Hygrotech Seeds (Pty) Ltd, McDonalds Seeds (Pty) Ltd, and Starke-Ayres
(Pty) Ltd, for information on the most popular cultivars currently being
grown.
Iona Hendry, for compiling and editing the manuscript, as well as for her
patience in handling the numerous alterations and rewrites required by the
authors.
Richard Bell, for sub-editing the manuscript.
Many other colleagues and friends, for their assistance and support.