Lucerne (Medicago sativa) is also known as 'alfalfa', which means 'best fodder' - and this says it all. Lucerne is the king of fodder, yielding a large volume of high quality hay that's rich in protein.
Lucerne belongs to the legume family, which means that, working with soil bacteria called rhizobia, it is able to fix nitrogen to make it available for plant growth.
In South Africa, lucerne is grown under irrigation and as a dryland crop. Because it is a semi-permanent crop that covers the entire soil surface, errors made while establishing a planting are difficult to rectify.