id	keyword
american_scientific_journal-5154	soil
american_scientific_journal-5154	macrofauna
american_scientific_journal-5154	agriculture
american_scientific_journal-5154	conservation
american_scientific_journal-5154	maize
american_scientific_journal-5154	bean
american_scientific_journal-5154	sole
american_scientific_journal-5154	tillage
american_scientific_journal-5154	study
american_scientific_journal-5154	count