Table 2. Effects (F-value) of cut, age and their interaction on the yields (mg/m²) of Cu, Fe, Mn and Zn in lucerne.

Treatment	df	Biomass	Cu	Fe	Mn	Zn
Cut	2	20.109 (P < 0.001)	4.155 (P = 0.026)	31.835 (P < 0.001)	30.898 (P < 0.001)	43.759 (P < 0.001)
Age	4	12.946 (P < 0.001)	2.912 (P = 0.039)	4.923 (P = 0.004)	7.029 (P < 0.001)	10.101 (P < 0.001)
Cut × Age	7	2.470 (P = 0.042)	4.488 (P = 0.002)	1.678 (P = 0.155)	2.409 (P = 0.046)	6.045 (P < 0.001)

Note:

F-values (P-values) were shown as the results. It was determined by two-way analysis of variance. The significant difference was at P < 0.05.