Agronomic Productivity of Lowland Rice: Impacts of Tillage and Nutrient Management in Barili, Cebu
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Abstract
Lowland rice (Oryza sativa var. NSIC RC222) under conventional (M1) and minimum (M2) tillage systems utilizing various fertilizer treatments (T1-control (no fertilizer application); T2 - Organic fertilizer at 2 t ha-1 (combination of rice straw compost, chicken manure dried, and carbonized rice hull at 1:1:1 ratio); T3 - Organic fertilizer (same as T2) + inorganic fertilizer at a rate of 60-30-30 kg/ha N-P2O5-K2O; and T4 - Inorganic fertilizer at the rate of 120-60-60 kg N-P2O5-K2O) was the subject of a split-plot study to evaluate the agronomic and yield performance of lowland rice under different tillage systems and nutrient management schemes. Results showed that Conventional Tillage and Minimum Tillage showed comparable effects on the growth and yield of lowland rice. Further, the application of integrated inorganic and organic fertilizers yielded significant results compared with treatments with no fertilizer application or organic fertilizer alone. However, comparable values were observed for T4 (inorganic application). Thus, the study offers rice producers a workable plan by recommending the use of combined inorganic and organic fertilizers with Minimum Tillage for rice production to preserve soil health and quality.
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