The German Thünen Institute has found that co-cultivation of maize and beans can be beneficial for silage production. The research, supported by the National Program for Organic Farming, shows that the amount of crude protein per unit area is higher when these plants are grown together, especially under organic farming conditions. The presence of beans in silage feed improves its digestibility. German organic farmers consider this a acceptable alternative, and the institute recommends that the proportion of beans should not exceed 20 percent and weed control should be applied before germination.