Table 4.

Analysis of variance (ANOVA)

Columns	Factors	DOF	Sum of sqrs.	Variance	F-ratio	Pure sum	% contribution
1	C/N ratio	1	0.795	0.795	0.258	2.541	5.183
2	K+/Ca2+	1	7.553	7.553	2.451	4.471	9.037
3	INTER COLS 1 × 2	1	7.602	7.602	2.467	4.52	9.136
4	Mg2+/Na+	1	2.27	2.270	0.736	5.346	12.945
5	INTER COLS 1 × 4	1	1.365	1.365	0.443	3.976	10.151
6	INTER COLS 2 × 4	1	26.812	26.812	8.700	23.731	47.960
Other error		1	3.081	3.081			5.588
Total		7	49.481				100