id	keyword
american_scientific_journal-7133	watershed
american_scientific_journal-7133	soil
american_scientific_journal-7133	land
american_scientific_journal-7133	denkyira
american_scientific_journal-7133	use
american_scientific_journal-7133	degradation
american_scientific_journal-7133	food
american_scientific_journal-7133	drainage
american_scientific_journal-7133	erosion
american_scientific_journal-7133	cover
american_scientific_journal-7133	runoff
american_scientific_journal-7133	surface
american_scientific_journal-7133	engineering
american_scientific_journal-7133	stream
american_scientific_journal-7133	journal