Table 1.
Details of the irrigated rice crops
| Cultivar |
Year |
Actual yield (t ha−1) |
Predicted potential yield (t ha−1) |
Transplanting date |
Panicle initiation (DAT) |
Crop Duration (days) |
Remarks |
|||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| IR72 | 1997 | 11·6 ± 0·7 | 11·4 | 27 Jan. | 43 | 102 | El Niño year (Sheehy et al., 2000) | |||||||
| 1998 | 11·6 ± 0·3 | 10·6 | 28 Dec. | 39 | 101 | Dry year (Sheehy et al., 2000) | ||||||||
| 1999 | 8·1 ± 0·2 | 8·9 | 4 Jan. | 38 | 105 | Average year (Sheehy et al., 2001) | ||||||||
| 2000 | 7·6 ± 0·1 | 9·1 | 10 Jan. | 42 | 107 | Unusually wet year (unpubl. data) | ||||||||
| 2001 | 7·8 ± 0·1 | 8·8 | 5 Jan. | 40 | 101 | Average year (Sheehy et al., 2004b) | ||||||||
| NPT | ||||||||||||||
| (IR65598-112-2) | 1997 | 11·6 ± 0·5 | 11·4 | 27 Jan. | 56 | 116 | El Niño year (Sheehy et al., 2000) | |||||||
| (IR65564-44-5-1) | 1998 | 12·0 ± 0·3 | 10·6 | 28 Dec. | 46 | 108 | Dry year (Sheehy et al., 2000) | |||||||
| (IR68011-15-1-1) | 1999 | 7·0 ± 0·2 | 8·9 | 4 Jan. | 53 | 114 | Average year (Sheehy et al., 2001) | |||||||
Yields are given at 14 % moisture content (86 % dry matter).
El Niño years in the Philippines are exceptionally sunny and dry.
Potential predicted yield is from the model given in Sheehy et al. (2004c).