id	keyword
ajoaa-556	energy
ajoaa-556	apple
ajoaa-556	mechanization
ajoaa-556	production
ajoaa-556	level
ajoaa-556	economic
ajoaa-556	total
ajoaa-556	use
ajoaa-556	inputs
ajoaa-556	productivity
ajoaa-556	journal
ajoaa-556	orchards