Rice straw biochar and NPK minerals for sustainable crop production in arid soils: a case study on maize-wheat cropping system

Table 6 Effect of single and combined applications of RSB and NPK mineral fertilizers on soil enzyme activities (urease, alkaline phosphatase and dehydrogenase)

	Summer season (maize)					Winter season (wheat)
	df	Sum of squares	Mean square	F	Sig	Sum of squares	Mean square	F	Sig
Urease enzyme activity
Between groups	5	6.444	1.289	61.376	< 0.001	7.595	1.519	65.636	< 0.001
Within groups	12	0.252	0.021			0.278	0.023
Total	17	6.696				7.873
Alkaline phosphatase enzyme activity
Between groups	5	1.419	0.284	1.476	0.268	1.934	0.387	1.677	0.215
Within groups	12	2.037	0.192			2.768	0.231
Total	17	3.726				4.702
Dehydrogenase enzyme activity
Between groups	5	0.138	0.028	84.525	< 0.001	0.13	0.026	70.096	< 0.001
Within groups	12	0.004	0			0.004	0
Total	17	0.142				0.134

ISSN: 2662-4044