Table 3.

Effect of biochar and compost on N, P and K availability and uptake.

Treatments	N	P	K
Available soil nutrients (mg kg−1)
Control	70 ± 3c	16 ± 2b	650 ± 22b
BIC1	75 ± 4bc	17 ± 2b	750 ± 25a
BIC2	87 ± 3a	22 ± 2a	774 ± 27a
COM1	80 ± 3b	20 ± 3a	780 ± 22a
COM2	88 ± 4a	21 ± 3a	760 ± 21a
BIC1 + COM1	90 ± 5a	22 ± 2a	750 ± 23a
Nutrient concentrations in plant shoots (g kg−1)
Control	25 ± 2b	4.8 ± 0.2c	15 ± 0c
BIC1	29 ± 2a	5.4 ± 0.2b	17 ± 1b
BIC2	30 ± 3a	6.5 ± 0.1a	18 ± 1a
COM1	28 ± 3a	6.0 ± 0.3a	16 ± 1b
COM2	31 ± 3a	6.2 ± 0.3a	18 ± 1a
BIC1 + COM1	30 ± 3a	6.3 ± 0.1a	18 ± 1a

Means (± SD, n = 5) denoted by the same letter indicate no significant difference according to Tukey’s multiple range tests at p < 0.05.