(i) It is a Rabi crop and a temperate crop.
(ii) It requires about 10-15° C temperature and a rainfall of 50-75 cms.
(iii) It requires well drained fertile soil.
(iv) Leading producers are Punjab, Haryana and Uttar Pradesh.
(v) It does not require much of labour.
(i) It is a Kharif crop and a tropical crop.
(ii) It requires more than 25°C temperature, high humidity with annual rainfall of above 100 cms.
(iii) It requires fertile alluvial soil with a clayey layer above.
(iv) Leading producers are West Bengal, Kerala and Punjab.
(v) It requires cheap labour for transportation.