Table 6.

Chromium concentration in soil, root, and shoot of studied maize cultivars NK-8441, P-1543, NK-8711, and FH-985 with the application of biochar in tannery polluted Kasur and Sialkot soils.

Soil	Biochar	Maize Variety	Soil (μg g−1)		Root (μg g−1)		Shoot (μg g−1)
			Cr (III)	Cr (VI)	Cr (III)	Cr (VI)	Cr (III)	Cr (VI)
K soil	0%	NK-8441	28.4 ± 0.83 m	12.2 ± 0.40 fg	132 ± 5.00 i	65 ± 2.78 hi	105 ± 4.00 ij	50 ± 2.15 jk
		P-1543	33.5 ± 0.93 kl	14.3 ± 0.42 c–e	102 ± 5.07 kl	50 ± 1.56 jk	79 ± 3.40 kl	38 ± 2.08 lm
		NK-8711	23.2 ± 0.81 n	10.0 ± 0.38 h–j	168 ± 5.38 gh	80 ± 3.46 fg	130 ± 5.13 gh	61 ± 1.34 g–i
		FH-985	18.2 ± 0.77 o	7.9 ± 0.35 kl	197 ± 6.83 ef	99 ± 2.60 de	161 ± 4.78 d–f	74 ± 2.23 d–f
	3%	NK-8441	49.7 ± 1.05 ef	8.7 ± 0.32 jk	82 ± 5.35 l	42 ± 2.80 k	66 ± 4.72 l	32 ± 2.17 m
		P-1543	55.2 ± 1.1 cd	10.8 ± 0.38 g–i	53 ± 3.19 m	27 ± 2.69 l	41 ± 2.89 m	21 ± 1.60 n
		NK-8711	44.1 ± 0.96 gh	6.5 ± 0.30 l	112 ± 7.02 jk	56 ± 2.18 ij	92 ± 5.73 jk	43 ± 2.13 kl
		FH-985	39.0 ± 0.86 ij	4.3 ± 0.29 m	141 ± 5.61 hi	73 ± 3.29 gh	120 ± 4.16 g–i	56 ± 1.66 h–j
S soil	0%	NK-8441	40.4 ± 0.93 hi	17.1 ± 0.49 b	233 ± 5.37 cd	103 ± 3.30 cd	185 ± 4.80 cd	81 ± 1.68 cd
		P-1543	45.6 ± 1.04 fg	19.4 ± 0.52 a	204 ± 4.70 e	88 ± 2.74 ef	155 ± 4.95 ef	68 ± 2.72 e–g
		NK-8711	34.9 ± 0.91 jk	14.9 ± 0.46 cd	263 ± 6.58 b	121 ± 2.24 b	214 ± 5.45 b	94 ± 1.73 b
		FH-985	29.6 ± 0.85 lm	12.8 ± 0.43 e–g	307 ± 4.89 a	142 ± 3.24 a	251 ± 4.91 a	110 ± 2.51 a
	3%	NK-8441	62.2 ± 1.09 b	13.6 ± 0.41 d–f	174 ± 4.44 fg	82 ± 2.84 fg	140 ± 4.83 fg	64 ± 2.20 f–h
		P-1543	67.4 ± 1.06 a	15.7 ± 0.43 bc	143 ± 6.24 hi	65 ± 2.07 hi	110 ± 3.48 h–j	51 ± 1.60 i–k
		NK-8711	57.0 ± 0.96 c	11.4 ± 0.37 gh	207 ± 4.99 de	99 ± 2.27 de	166 ± 6.37 de	76 ± 1.89 de
		FH-985	50.7 ± 0.93 de	9.2 ± 0.32 i–k	236 ± 5.65 bc	115 ± 3.35 bc	200 ± 4.65 bc	91 ± 2.15 bc

The values are mean ± S.E. (n = 3). Mean values with different alphabetical letters are significantly different (p < 0.05) according to Tukey’s HSD test; K: Kasur soil; S: Sialkot soil.