Tất cả lượng phân lân cần thiết thường được bón vào giai đoạn sạ hoặc ngay sau đó; lân có thể được bón dưới dạng SSP (0-16-0), DAP (18-46-0) hoặc NPK (20-20-15); Tính toán tỷ lệ phân lân dựa trên phương pháp cân bằng dinh dưỡng thường có tác dụng trong sản xuất lúa ngập nước vì đất ngập nước có xu hướng làm tăng lượng Phốt pho hữu dụng của cây trồng.
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