Table 1: Effects of tillage, N application and different seasons on anthesis wheat dry matter yield (kg ha-1 mm-1)*.
Year | Conventional till (CT) | No-till (NT) | Year mean | ||
No N added (N0) | 75 kg N ha-1 (N75) | No N added (N0) | 75 kg N ha-1 (N75) | ||
1992 | 5790 | 5930 | 5530 | 6810 | 6015 |
1993 | 3400 | 3820 | 2840 | 3520 | 3395 |
1994 | 2750 | 3960 | 2590 | 4070 | 3343 |
1995 | 2180 | 2140 | 2590 | 2120 | 2258 |
1996 | 4160 | 5040 | 2880 | 4350 | 4108 |
Mean | 3656 | 4178 | 3286 | 4174 | 3824 |
*Treatment effects: least significant difference at P < 0.05; year, 1550; N, 980; year × N, 1620; tillage × N, 1520. Tillage, year × tillage, and year × tillage × N interactions were not significant.