id	keyword
agsci-623	urea
agsci-623	fertilizers
agsci-623	urea spraying
agsci-623	basal
agsci-623	application
agsci-623	rest
agsci-623	yield
agsci-623	stage
agsci-623	pod
agsci-623	initiation
agsci-623	days
agsci-623	plant
agsci-623	initiation stage