TABLE 2.

Integrated effect of biochar and nitrogen application on chemical properties of soil during 2019–2020.

Biochar	Nitrogen	Soil pH	SOC (g kg–1)	NO${}_3^{-}$-N (mg kg–1)	NH${}_4^{+}$-N (mg kg–1)	TP (g kg–1)	AK (mg kg–1)
B0	N0	6.37 f	3.89 e	9.54 h	4.48 gh	0.32 k	109.24 f
	N75	6.46 e	4.06 e	12.44 fg	4.81 fgh	0.33 jk	107.90 f
	N225	6.43 ef	3.92 e	17.66 d	5.76 defg	0.38 hij	111.48 f
	N450	6.41 ef	4.11 e	21.04 c	6.09 def	0.38 hij	109.93 f
B15	N0	6.74 cd	6.84 d	13.54 efg	4.97 efgh	0.36 ij	128.10 e
	N75	6.67 d	7.05 d	18.16 d	6.50 de	0.39 ghi	127.05 e
	N225	6.75 c	7.25 d	24.54 b	6.25 def	0.40 fgh	129.96 e
	N450	6.69 cd	7.15 d	25.11 b	8.76 b	0.42 fg	128.39 e
B30	N0	6.91 b	11.39 c	13.66 efg	4.19 gh	0.42 fg	156.36 d
	N75	6.89 b	11.38 c	15.70 de	6.20 def	0.44 ef	162.28 c
	N225	6.86 b	12.49 c	24.21 b	6.80 cd	0.46 de	158.20 cd
	N450	6.87 b	11.35 c	27.74 a	10.49 a	0.50 bc	159.12 cd
B60	N0	7.14 a	16.02 b	11.70 gh	4.01 h	0.46 de	170.26 b
	N75	7.13 a	16.62 b	14.91 ef	5.42 defgh	0.47 cd	176.19 a
	N225	7.16 a	17.88 a	23.22 bc	6.19 def	0.52 ab	179.35 a
	N450	7.09 a	16.08 b	28.44 a	8.34 bc	0.54 a	176.83 a
F-values and significance level
Biochar		553.67***	685.67***	32.92***	6.99*	153.68***	1065.81***
Nitrogen		1.54 ns	2.16 ns	206.77***	37.06***	33.54***	1.99 ns
Biochar × Nitrogen		1.64 ns	1.01 ns	2.79*	2.36*	0.76 ns	1.48 ns

B0, 0 t ha^–1 biochar; B15, 15 t ha^–1 biochar; B30, 30 t ha^–1 biochar; B60, 60 t ha^–1 biochar; N0, 0 kg ha^–1 nitrogen; N150, 150 kg ha^–1 nitrogen; N300, 300 kg ha^–1 nitrogen, and N450, 450 kg ha^–1 nitrogen. SOC, soil organic carbon; NO${}_3^{-}$-N, nitrate nitrogen; NH${}_4^{+}$-N, ammonium nitrogen; TP, total phosphorus; and AK, available potassium. Different letters within the columns show a significant difference between the treatments at p = 0.05 according to the LSD test, and asterisks represent a significant difference at *p < 0.05, **p < 0.01, ***p < 0.001 level; ns, not-significant.