Faba bean requires a cool season for best development. It is grown
as a winter annual in warm temperate and subtropical areas; hardier
cultivars in the Mediterranean region tolerate winter temperatures
of -10°C without serious injury whereas the most hardy European
cultivars can tolerate up to -15°C (Robertson, 1996). "It can be
grown anywhere and does not winterkill. Well-adapted to wetter
portions of cereal-growing areas of western Canada and elsewhere.
Tolerates nearly any soil type; grows best on rich loams. Moderate
moisture supply is necessary" (Duke, 1981). They are considered to
be the least drought resistant of legume crops; however, cultivars
with high water use efficiency have been developed at ICARDA
(Robertson, 1996). "Moisture requirement is highest about 9-12
weeks after establishment. Faba bean is more tolerant to acid soil
conditions than most legumes. Can be grown in nearly all parts of
the United States without liming. Growing seasons should have
little or no excessive heat, optimum temperatures for production
range from 18 to 27°C (65-85°F)" (Duke, 1981). Rainfall of 650-1000
mm per annum evenly distributed is ideal (Kay, 1971). The maturity
period ranges from 90-220 days depending upon the cultivars and
climatic conditions (Bond et al., 1985).
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