id	keyword
american_scientific_journal-4452	soil
american_scientific_journal-4452	leaching
american_scientific_journal-4452	pesticide
american_scientific_journal-4452	potential
american_scientific_journal-4452	som
american_scientific_journal-4452	clay
american_scientific_journal-4452	risk
american_scientific_journal-4452	high
american_scientific_journal-4452	texture
american_scientific_journal-4452	classes