id	keyword
afs-78169	n.s
afs-78169	plants
afs-78169	amf
afs-78169	content
afs-78169	mycorrhizal
afs-78169	substrate
afs-78169	concentration
afs-78169	effect
afs-78169	lettuce
afs-78169	selenium
afs-78169	phosphorus
afs-78169	dm-3