id	keyword
american_scientific_journal-2543	water
american_scientific_journal-2543	systems
american_scientific_journal-2543	nutrient
american_scientific_journal-2543	plants
american_scientific_journal-2543	hydroponic
american_scientific_journal-2543	aeroponics
american_scientific_journal-2543	farming
american_scientific_journal-2543	aquaponics
american_scientific_journal-2543	irrigation
american_scientific_journal-2543	agriculture