Micronutrient content (mg kg⁻¹) of leaves at the end of the experiment as affected by growing medium.

Composted corn cobs (C), pyrolysed corn cobs (PC), pyrolysed garden wastes (PG), and Pindstrup sphagnum peat moss (P); PC (100%), C (100%), PG (100%), C (70%) + PG (30%), PC (70%) + PG (30%), P (50%) + C (35%) + PG (15%), P (50%) + PC (50%), P (50%) + PC (35%) + PG (15%), and P (50%) + C (50%).

Within a column, means followed by different letters are significantly different according to Duncan's multiple range test at P<0.05. The last row indicates the significance of medium according to the ANOVA:

*P<0.05;

**P<0.01 (n = 3).