Broad bean, alias south bean, hu dou, belong to bean family, pea genus, annual or more than the herbs.Broad bean is the third most
important winter food bean crop in the world.Broad bean nutrition value is higher, its protein content is 25%-35%.They are also
rich in sugar, minerals, vitamins, calcium and iron.In addition, as a nitrogen-fixing plant, broad beans convert natural molecular
nitrogen into nitrogen compounds, increasing soil nitrogen content