id	keyword
afs-83441	soil
afs-83441	spring
afs-83441	fieldwork
afs-83441	yield
afs-83441	traffic
afs-83441	sowing
afs-83441	timing
afs-83441	intensity
afs-83441	penetration
afs-83441	effects
afs-83441	et al
afs-83441	resistance