“…Restoration of degraded lands that provide economic support to poor farmers and biomass production for bioenergy generation are of great concern (https://sustainabledevelopment.un.org; Singh, Awasthi, Singh, & Tewari, 2020). In this regard, biomass production on marginal and polluted lands using diverse perennial grasses is receiving special attention from scientists and policy makers across the world (Awasthi, Singh, & Singh, 2017; Gelfand et al, 2013; Singh, 2019; Tilman, Hill, & Lehman, 2006; Tilman, Reich, & Knops, 2006; Verma, Trivedi, Gupta, & Verma, 2017; Yang, Tilman, Furey, & Lehman, 2019). A few long term studies have focused on tall perennial grasses and have reported that diverse cropping systems with low inputs are more productive than monocultures with high inputs (Awasthi, Singh, Soni, Singh, & Kalra, 2014; Cardinale et al, 2007; Carruthers et al, 2019; DeHaan, Weisberg, Tilman, & Fornara, 2010; Tilman, Hill, & Lehman, 2006).…”