Pigeonpea (Cajanus cajan (L.) Millsp) belongs to a group of leguminous crops
called pulses. The pulse legumes, are those species harvested traditionally for their mature
seeds, and are a major source of dietary proteins and feed products throughout the world.
They are especially important as human food in those regions where animal proteins are
scarce (Norton et al., 1985). Their introduction into a feeding regime based on cereals or
tubers balances the latter and combats protein deficiency linked malnutrition, which is
frequent in the developing countries, especially in West Africa (Borget 1992).