Maize Seedlings in Greenhouses. Recent papers by Kifle and Laing showed that diazotrophs isolated from Maize tissue and Maize-associated soil have the potential to promote growth of this important crop when used to inoculate seeds prior to planting (Kifle and Laing, 2016a,b). The fact that the authors focused their studies on diazotrophs presumes that the biological nitrogen fixation (BNF) is k...