id	keyword
brj-23866	biogas
brj-23866	slurry
brj-23866	irrigation
brj-23866	et al
brj-23866	soil
brj-23866	biogas slurry
brj-23866	drip
brj-23866	china
brj-23866	content
brj-23866	drip irrigation
brj-23866	doi
brj-23866	wang