Methane yield and species diversity dynamics of perennial wild plant mixtures established alone, under cover crop maize (Zea mays L.), and after spring barley (Hordeum vulgare L.) - von Cossel, Moritz; Stelberl, Kathrin; Hartung, Jens; Pereira, Lorena Alves; Kiesel, Andreas; Lewandowski, Iris (Global Change Biology Bioenergy, 2019)