id	keyword
american_scientific_journal-5693	humic
american_scientific_journal-5693	seedlings
american_scientific_journal-5693	application
american_scientific_journal-5693	acids
american_scientific_journal-5693	root
american_scientific_journal-5693	mass
american_scientific_journal-5693	alternative
american_scientific_journal-5693	quality
american_scientific_journal-5693	commercial
american_scientific_journal-5693	plant
american_scientific_journal-5693	height
american_scientific_journal-5693	area
american_scientific_journal-5693	journal
american_scientific_journal-5693	leaf