Sugarcane (1) Sugar (1) Soils (1) Sewage--Purification (1) Research (1) Quality of products (1) Potassium (1) Phosphorus (1) Nitrogen (1) Months (1) Matter (1) Interest (1) Industrial productivity (1) Chance (1) Agriculture (1) Ability (1) Meses (1) Suelo (1) Fósforo (1) Interés (1) Potasio (1) Estudio (1) Calidad (1) Azúcares (1) Productividad (1) Nitrógeno (1) Investigación (1) Caña de azúcar (1) Azúcar (1) Azar (1)