Evaluating Slow Pyrolysis of Parthenium hysterophorus Biochar: Perspectives to Acidic Soil Amelioration and Growth of Selected Wheat (Triticum aestivum) Varieties

Table 4

Summary of two-way ANOVA results for the soil chemical properties in terms of soil sample years and parthenium biochar dosages.

Source of variations	DF	pH (H2O)		pH (KCl)		EC (ms/cm)		Ca (cmol^+/kg)		K (cmol^+/kg)		Na (cmol^+/kg)		Mg (cmol^+/kg)		CEC(cmol^+/kg)		AvP (ppm)		OC (%)
		MS	P	MS	P	MS	P	MS	P	MS	P	MS	P	MS	P	MS	P	MS	P	MS	P
SSY	1	3.17		4.02		2.14		85.5		34.0		0.3		41.1		268.5		4285.7		5.2
PBD	5	4.9		4.04		1.6		25.9		35.7		0.2		8.9	p > 0.05	73.6		2561.7		1.84
	5	0.14		0.05		0.15		6.5		2.7		0.009		2.5		11.9		227.8		0.34
Error	24	0.26	—	0.28	—	1.015	—	1.11	—	11.16	—	0.002	—	2.6	—	2.3	—	19.8	—	0.0016	—
Mean		7.1	—	6.44	—	0.01	—	15.4	—	4.5	—	0.59	—	6.2	—	26.24	—	48.3	—	1.5	—
R-square (R^2)		0.82	—	0.78	—	0.97	—	0.90	—	0.89	—	0.81	—	0.60	—	0.92	—	0.97	—	0.97	—

SSY, soil sample years; PBD, parthenium biochar dosages; MS, mean square; P, probability level; and DF, degree of freedom.