id	keyword
american_scientific_journal-6913	value
american_scientific_journal-6913	composting
american_scientific_journal-6913	result
american_scientific_journal-6913	control
american_scientific_journal-6913	days
american_scientific_journal-6913	growth
american_scientific_journal-6913	materials
american_scientific_journal-6913	pcm5
american_scientific_journal-6913	stem
american_scientific_journal-6913	difference