Table 4 Mean values of above-ground dry biomass yield (Mg ha⁻¹) and harvest index (%).

9.7 ± 0.8^c

8.7 ± 0.9^c

18.4 ± 0.8^c

46.1 ± 2.3^a

11.0 ± 1.2^ab

8.7 ± 0.5^c

19.8 ± 0.5^bc

45.0 ± 1.7^a

11.5 ± 1.0^ab

9.5 ± 0.3^b

20.9 ± 1.1^ab

46.7 ± 2.4^a

12.5 ± 1.8^a

10.3 ± 0.7^a

22.8 ± 0.7^a

46.4 ± 4.0^a

11.7 ± 1.7^ab

9.8 ± 0.2^ab

21.5 ± 1.9^ab

46.2 ± 3.4^a

12.2 ± 2.1^ab

9.8 ± 0.6^ab

22.0 ± 1.6^ab

45.9 ± 5.5^a

12.4 ± 0.5^a

9.7 ± 0.1^ab

22.1 ± 0.6^ab

44.9 ± 0.3^a

12.0 ± 0.7^ab

10.4 ± 0.1^a

22.5 ± 0.6^a

47.1 ± 2.2^a