A study on wetland rice growth over 30 years showed that continuous lack of phosphorus reduced grain yield, even with enough nitrogen and potassium. Adding more nitrogen and phosphorus increased grain yield, with phosphorus having a bigger impact. Using lower levels of nitrogen and phosphorus was more efficient, but efficiency decreased with higher levels. Not adding phosphorus decreased nutrient uptake. Increasing nutrient application levels increased total nutrient uptake per ton of grain. Nitrogen balance was always negative, while phosphorus balance was negative only in control plots. Imbalanced and inadequate fertilization affects wetland rice yield response to nutrients, even though phosphorus is not usually a limiting nutrient in Indian acid soils.