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Effect of adding phosphorus (P) and potassium (K) to nitrogen (N) fertilisation on the agronomic efficiency of applied N (AEN) and yield for various crops in India Adapted from Ghosh et al. (2015)
| Crop | Yield | AEN | ||
|---|---|---|---|---|
| (t ha–1) | (kg grain kg N–1) | |||
| N alone | N+PK | N alone | N+PK | |
| Sorghum | 1.27 | 1.75 | 5.30 | 12 |
| Pearl millet | 1.05 | 1.65 | 4.70 | 15 |
| Wheat | 1.45 | 2.25 | 10.8 | 20 |
| Rice (wet season) | 3.28 | 3.82 | 13.5 | 27 |
| Maize | 1.67 | 3.23 | 19.5 | 39 |
| Rice (summer) | 3.03 | 6.27 | 10.5 | 81 |
| Sugarcane | 47.2 | 81.4 | 78.7 | 228 |
