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

Table 6

Multivariate analysis for the soil micronutrients contents related with the soil sample years and parthenium biochar dosages.

Sources of variations	DF	Cu (mg/L)		Zn (mg/L)		Mn (mg/L)		Fe (mg/L)
		MS	P	MS	P	MS	P	MS	P
SSY	1	0.94		0.02		5.4		14.7
PBD	5	1.67		0.69		3.5		45.6
	5	0.19		0.007		0.33		0.75
Error	24	0.12	—	0.018	—	0.1	—	2.9	—
Mean	0.42	—	0.74	—	2.4	—	8.1	—	—
R-square (R^2)	0.78	—	0.89	—	0.90	—	0.77	—	—

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