id	keyword
afs-71881	clay
afs-71881	soil
afs-71881	content
afs-71881	clay content
afs-71881	phosphorus
afs-71881	clay soils
afs-71881	peat
afs-71881	plants
afs-71881	finesand
afs-71881	uptake
afs-71881	effect