Proper control brings positive returns 
Hofmeyr, Izak,The Dairy Mail, 14, 46-49 (2007),
publicationName = "Agri Connect (Pty) Ltd",
issn = "1561-4301",
abstract= "Stuart Mackenzie farms on the farm Loskop in the Karkloof Valley where around 400 ha is used for his milk production unit. The remaining 224 ha consists of wetland areas and mountains. He currently milks around 400 Holsteins and 230 Ayrshire cows, each group in its own parlour."
language="English",
type="Journal Article"