Level of fertilization (kg N/ha)

Biomass (t DM/ha)

Total

(t DM/ha)

Means

(t DM/ha)

F₁

F₂

F₃

F₄

0

2.89^a

1.49^a

1.2^a

1.31^a

6.89^a

1.72^a

100

4.43^b

1.76^a

1.78^b

1.73^ab

9.7^b

2.42^b

200

6.22^c

2.38^b

1.78^b

1.72^b

12.3^c

3.07^c

SEM

0.44

0.14

0.10

0.11

0.71

0.18

p

0.001

0.017

0.004

0.049

0.001

0.001