الرعايه
Black gram is an erect annual herb with hairy leaves and narrow seed pods of 4-6 cm length. The stem is branched and the plant has a bushy appearance. The plant is based on a well-developed taproot. India produces approximately 1.5 million tons of gram seeds per year, with other big producers being Myanmar and Thailand.
التربة
Ideal soil types are rich black vertisols or loamy soils that are well-drained and have a pH of 6-7. However, if lime and gypsum are added to the soil, Vigna mungo can withstand acidic soils down to a pH of 4.5. The crop is sensitive to saline and alkaline soils. It is drought-tolerant and grows best in semi-arid areas.
المناخ
Vigna mungo can be found in tropical areas of Asia, Madagascar and Africa. The plant is primariliy distributed in lowlands but can be found up to 1800 m above sea level. It grows best during the dry seasons in temperatures ranging from 25°C to 35°C.