			Mean change in EC^c (dS∙m⁻¹)			Mean change in pH^d
Ratio	EC^a	pH^b	Marigolds	Sunflowers	Tomatoes	Marigolds	Sunflowers	Tomatoes
^e
	0.6	5.7	−0.3	−0.4	−0.2	+0.2	+2.8	+0.1
	1.2	5.3	−0.1	−0.4	+0.3	+1.6	+1.1	+0.4
	2.2	4.9	+1.4	+1.2	+1.3	−0.5	−0.9	+0.1
	4.0	4.6	+3.5	+3.3	+2.7	−0.7	−1.2	−0.3
/P^e
	0.6	5.7	−0.3	−0.2	−0.4	+0.6	−0.3	+1.2
	1.2	5.5	−0.1	−0.1	−0.4	+1.1	+0.3	+1.1
	2.2	5.3	+1.5	+1.4	+0.8	+1.2	−0.9	+0.4
	4.0	4.5	+3.5	+2.8	+2.9	−0.6	−0.6	−0.3
/P^e
	0.6	5.4	−0.3	−0.2	−0.1	+0.1	+1.0	+0.8
	1.2	5.4	0.0	−0.1	+0.2	+1.1	+1.2	+0.8
	2.2	5.2	+1.3	+1.2	+1.5	−0.6	−0.4	−1.5
	4.0	5.0	+1.5	+2.9	+3.1	−1.0	−1.1	−0.3