Pea is an important frost-hardy, cool-season, nutritious leguminous vegetable
that is widely cultivated throughout the world. As a cool-season crop, it is
extensively grown in temperate zones; but it is restricted to cooler altitudes in
the tropics and winter season in the subtropics. It is a rich source of protein
(25%), amino acids, sugars (12%), carbohydrate, vitamins A and C, calcium
and phosphorus, apart from having a small quantity of iron. Peas being very rich in proteins are valuable for vegetable purposes.