Nitrogen fertilization has minimal influence on rhizosphere effects of smooth crabgrass (Digitaria ischaemum) and bermudagrass (Cynodon dactylon)
Biao Zhu, Kevin Panke-Buisse, Jenny Kao-Kniffin
J Plant Ecol . 2015, (4): 390 -400 .  DOI: 10.1093/jpe/rtu034