Λέξεις-κλειδιά:
article; corn; effluent; nonhuman; plant growth; plant leaf; sewage treatment plant; sludge; spectrophotometry; sunflower, Fertilizers; Greece; Helianthus; Sewage; Waste Management; Zea mays, fertilization; growth; land application; maize; sewage sludge; sunflower, Greece, Kos, Asteraceae; Helianthus; Helianthus annuus; Poaceae; Zea mays