id	keyword
american_scientific_journal-4792	week
american_scientific_journal-4792	soil
american_scientific_journal-4792	bone
american_scientific_journal-4792	npk
american_scientific_journal-4792	char
american_scientific_journal-4792	hydrocarbon
american_scientific_journal-4792	vol
american_scientific_journal-4792	fertilizer
american_scientific_journal-4792	journal
american_scientific_journal-4792	engineering
american_scientific_journal-4792	bacteria
american_scientific_journal-4792	bioremediation
american_scientific_journal-4792	research
american_scientific_journal-4792	bone char