Table 2.
Analysis of variance results for years, tillage system, and crop system.
| Yield (kg/ha) | Straw biomass (kg/ha) | Harvest index (HI) | |
|---|---|---|---|
| Year | *** | n. s | *** |
| 2014–2015 | 856 a | 1521 | 0.36 a |
| 2015–2016 | 820 a | 1451 | 0.36 a |
| 2016–2017 | 373 b | 1685 | 0.18 b |
| Tillage | n. s | n. s | ** |
| CT | 674 | 1731 | 0.28 b |
| MT | 696 | 1390 | 0.33 a |
| NT | 679 | 1537 | 0.30 ab |
| System | *** | *** | n. s |
| ROT | 781 a | 1803 a | 0.30 |
| MON | 585 b | 1303 b | 0,31 |
| Y*T | n. s | n. s | n. s |
| Y*S | n. s | n. s | n. s |
| T*S | n. s | n. s | n. s |
| Y*T*S | n. s | n. s | n. s |
Mean values for yield, straw biomass and Harvest Index (HI).
Different letters in each column indicate a difference between treatments according to HSD Tukey’s Test with 95% probability level (p < 0.05); *** = 0.05; ** = 0.1; * = 0.5
CT conventional tillage, MT minimum tillage, NT no tillage, ROT rotation, MON monoculture, Y year, T tillage, S system.