Sustainable Reuse of Dredged Soil as a Substrate Material by Improvement with Polyacrylamide, Straw, and Superabsorbent Polymer

Table 4

One-way analysis of variance for organic C; available N, P, and K; soil bulk density; total porosity; saturated water capacity; field capacity; and germination rate.

Items	Classification of variance	Sum of squares of deviation from mean	Mean square error	F
Organic C	PAM	1.152	0.288	1.102	0.4
	Straw	13.807	3.452	13.201	0
	SAP	4.083	1.021	3.903	0.03
Extractable N	PAM	1435.685	358.921	3.339	0.047
	Straw	1637.814	409.454	3.809	0.032
	SAP	597.03	149.258	1.388	0.296
Extractable P	PAM	4470.449	1117.612	1.204	0.359
	Straw	18121.042	4530.261	4.881	0.014
	SAP	3910.451	977.613	1.053	0.421
Extractable K	PAM	207349.274	51,837.318	1.891	0.177
	Straw	396860.139	99,215.035	3.62	0.037
	SAP	80137.184	20,034.296	0.731	0.588
Bulk density	PAM	0.012	0.003	0.891	0.499
	Straw	0.006	0.002	0.495	0.74
	SAP	0.283	0.071	21.705	0
Total porosity	PAM	93.784	23.446	2.016	0.156
	Straw	14.16	3.54	0.304	0.869
	SAP	450.42	112.605	9.683	0.001
Saturated water capacity	PAM	0.023	0.006	2.572	0.092
	Straw	0.003	0.001	0.31	0.866
	SAP	0.246	0.061	27.418	0
Germination rate	PAM	63.36	15.84	6.968	0.004
	Straw	29.76	7.44	3.273	0.049
	SAP	64.96	16.24	7.144	0.003