Soybean and Clay Cowpea Grown for Forage Production in the Subtropics

Fig. 2. Iron clay pea (Vigna unguiculata) is a warm season legume grown as a cover crop or with corn (Zea mays) as a forage in southeastern U.S.



Image from Crop Management article:
Soybean and Clay Cowpea Grown for Forage Production in the Subtropics