id	keyword
afs-146997	reference category
afs-146997	production
afs-146997	farming
afs-146997	farms
afs-146997	fertilizers
afs-146997	finland
afs-146997	income
afs-146997	variables
afs-146997	farmers
afs-146997	regression
afs-146997	areas
afs-146997	method
afs-146997	education
afs-146997	economy
afs-146997	use
afs-146997	survey