Pigeon Peas

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Pigeon pea
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?Pigeon pea


Scientific classification
Kingdom: Plantae

Division: Magnoliophyta

Class: Magnoliopsida

Order: Fabales

Family: Fabaceae

Genus: Cajanus

Species: C. cajan




Binomial name
Cajanus cajan
(L.) Millsp.


The pigeon pea (Cajanus cajan, syn. Cajanus indicus) is a member of the family Fabaceae. Other common names are red gram, toovar, toor, togari, gandul, Congo pea, Gungo pea, and no-eye pea.

The cultivation of the pigeon pea goes back at least 3000 years. The centre of origin is most likely Asia, from where it travelled to East Africa and by means of the slave trade to the New World. Today pigeon peas are widely cultivated in all tropical and semi-tropical regions of both the Old and the New World.

Pigeonpea is an important grain legume crop of rainfed agriculture in the semi-arid tropics. The Indian subcontinent, Eastern Africa and Central America, in that order, are the world's three main pigeonpea-producing regions. Pigeonpea is cultivated in more than 25 tropical and sub-tropical countries, either as a sole crop or intermixed with such cereals as sorghum (Sorchum bicolor), pearl millet (Pennisetium glaucum), or maize (Zea mays), or with legumes, e.g. peanut (Arachis hypogaea). Being a legume, pigeon pea enriches soil through symbiotic nitrogen fixation.

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Uses
Pigeon peas are both a food crop (dried peas, flour, or green vegetable peas) and a forage/cover crop. The dried peas may be sprouted briefly, then cooked, for a flavor different from the green or dried peas.

In India, split pigeon peas (toor dal) are one of the most popular pulses—along with chickpeas (chana), urad and mung.

Pigeon peas are nutritionally important, as they contain high levels of protein (typically 22% in dahl) and the important amino acids methionine, lysine, and tryptophan. In combination with cereals, pigeon peas make a well balanced human food.

In some countries, such as the Dominican Republic and Hawaii, pigeon peas are grown for canning.

The woody stems of pigeon peas are used as firewood, fencing and thatch. In Thailand, pigeon peas are grown as host for scale insects which produce lac.

Pigeon peas are in some areas an important crop for green manure. They can after incorporation provide up to 40 kg nitrogen per hectare.

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Cultivation

Pigeon peas from Trinidad and TobagoIn most areas pigeon peas are grown in association with other row crops such as sorghum, millet, or maize. Pigeon peas can be of a perennial type, in which the crop can last 3-5 years (although the seed yield drops considerably after the first two years), or an annual type more suitable for grain production.

The crop is cultivated on marginal land by resource-poor farmers, who commonly grow traditional medium- and long-duration (5-11 months) landraces. Short duration pigeon peas (3-4 months) suitable for multiple cropping have recently been developed. Traditionally, the use of such input as fertilizers, weeding, irrigation, and pesticides are minimal, so present yield levels are low (average = 700 kg/hac). Greater attention is now being given to managing the crop because it is in high demand at remunerative prices.

Pigeon peas are very drought resistant and can be grown in areas with less than 650 mm annual rainfall.

World production of pigeon peas is estimated at 46,000 km2. About 82% of this is in grown in India.

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Categories: Faboideae | Tropical agriculture