id	keyword
american_scientific_journal-10206	loam granular
american_scientific_journal-10206	silt loam
american_scientific_journal-10206	soil
american_scientific_journal-10206	nutrient
american_scientific_journal-10206	10yr
american_scientific_journal-10206	clay loam
american_scientific_journal-10206	silty
american_scientific_journal-10206	journal
american_scientific_journal-10206	research
american_scientific_journal-10206	huambo
american_scientific_journal-10206	luanda
american_scientific_journal-10206	sciences
american_scientific_journal-10206	province
american_scientific_journal-10206	technology
american_scientific_journal-10206	engineering
american_scientific_journal-10206	7.5r
american_scientific_journal-10206	mean
american_scientific_journal-10206	range
american_scientific_journal-10206	coatings
american_scientific_journal-10206	vol
american_scientific_journal-10206	asrjets
american_scientific_journal-10206	volume