id	keyword
american_scientific_journal-3104	factor
american_scientific_journal-3104	soil
american_scientific_journal-3104	erosion
american_scientific_journal-3104	land
american_scientific_journal-3104	c factor
american_scientific_journal-3104	risk
american_scientific_journal-3104	isiukhu
american_scientific_journal-3104	mean
american_scientific_journal-3104	cover
american_scientific_journal-3104	catchment
american_scientific_journal-3104	river