Anatree, Acacia albida: A nitrogen-fixing tree. The pods can be eaten by cattle, and crops can be grown under it.

African Marigold, Khakibos, Tagetes spp.: An annual flowering plant that is a general insect repellent. It is especially good at repelling moths and fleas indoors, and pumpkin flies outdoors.

Comfrey, Symphytum spp.: A leaf crop that is more than just a vegetable. It has many medicinal uses and is a useful component of compost.

Cowpea, Vignea sinensis: An annual nitrogen-fixing ground cover. It protects the soil and produces abundant seeds that are a rich source of protein for human consumption.

Vetiver grass. Vetiveria zizanioides: A tall, coarse drought-tolerant grass that is non-invasive. When grown in hedges, it controls sheet erosion, and allows run-off to soak into the soil.

Honey locust, Gleditsia triacanthos: A fast-growing, nitrogen-fixing tree, well suited to cool, dry zones. It produces abundant seeds relished by livestock, and makes an excellent meal or flour.

Lavendar, Lavendula soica: A medicinal herb that is said to relieve headaches, sunstroke, stress and over-excitement. It has insect repelling properties indoors and helps to repel cabbage fly when grown with cabbages.

Leucaena, Leucaena spp.: These are nitrogen-fixing trees of varying heights that can be coppiced. They produce abundant seeds, which are eaten by cattle and goats. The leaves can be eaten by chickens, and can be used for green manuring or making compost.

Lucerne. Medicago sativa: A nitrogen-fixing multi-stemmed herb which is a good fodder crop. It is rich in vitamins A. C, K and E, and untreated seeds can be sprouted for use in salads.

Pigeon pea, DahI. Cajanus cajan: A small nitrogen-fixing tree that can be used as a wind break when planted closely. The seeds are a rich source of protein for human consumption.

Tagasaste. Chamaecvtisus proliferus: A small nitrogen-fixing tree that produces heavy yields of valuable livestock fodder. The leafy branches can be cut and fed directly.