Soil property	P		Calloway	Roxana	Dapue	Creldon
Sand (g∙g⁻¹)	<0.01		0.09d^†	0.44a	0.20c	0.24b
Silt (g∙g⁻¹)	<0.01		0.79a	0.47d	0.74b	0.67c
Clay (g∙g⁻¹)	<0.01		0.12a	0.10b	0.07c	0.09b
pH	<0.01		7.46a	6.17b	5.77d	6.03c
Electrical conductivity (dS∙m⁻¹)	<0.01		0.17b	0.11d	0.19a	0.13c
Total C (%)	<0.01		1.14c	0.28d	2.57a	1.65b
Total N (%)	<0.01		0.11c	0.03d	0.2a	0.1b
C:N ratio	<0.01		10.0c	10.5b	11.8a	11.5a
Soil organic matter (%)	<0.01		2.6c	0.7d	4.2a	3.4b
NO₃-N (mg∙kg⁻¹)	<0.01		10.6c	9.0d	35.8a	15.3b
NH₄-N (mg∙kg⁻¹)	<0.01		5.3c	6.4b	17.9a	19.5a
Water-soluble concentrations (mg∙kg⁻¹)
P		<0.01	1.8d	11.9a	5.7b	3.5c
K		<0.01	6.2c	44.8a	19.7b	20.3b
Ca		<0.01	58.8b	34.0d	83.0a	43.7c
Mg		<0.01	8.9c	21.7a	16.7b	16.3b
S		<0.01	12.0a	4.9c	12.2a	9.5b
Na		<0.01	19.5a	4.1d	4.8c	5.9b
Fe		<0.01	1.5d	49.7a	1.9c	12.6b
Mn		<0.01	0.12d	0.57c	2.2a	1.7b
Zn		<0.01	0.52b	0.33c	0.90a	0.47bc
Cu		<0.01	0.03c	0.08a	0.06b	0.04c
Mehlich-3-extractable concentrations (mg∙kg⁻¹)
P		<0.01	11.4d	93.3a	41.7b	17.0c
K		<0.01	46.1d	145.3a	102.0c	113.0d
Ca		<0.01	2006a	933d	1601b	1115c
Mg		<0.01	276.3b	194.3d	216.0c	328.0a
S		<0.01	12.0b	5.7c	17.0a	13.0b
Na		<0.01	29.8a	10.0b	7.7c	10.4b
Fe		<0.01	303.8a	200.7b	139.3c	112.0d
Mn		<0.01	244.3a	32.9c	98.7b	101.3b
Zn		<0.01	2.6c	2.4c	30.9a	4.2b
Cu		<0.01	1.6b	1.1c	2.6a	1.2c
Total-recoverable concentrations (mg∙kg⁻¹)
P		<0.01	342.9c	370.7b	426.3a	248.0d
K		<0.01	597d	1730a	1436b	1160c
Ca		<0.01	2424a	1440c	2251b	1494c
Mg		<0.01	1318c	2433a	1202d	1372b
S		<0.01	137.2c	42.3d	245.7a	154.0b
Na		<0.01	61.6a	52.7b	26.7c	25.7c
Fe		<0.01	16705a	8340c	11059b	18023a
Mn		<0.01	1337a	177d	687c	1163b
Zn		<0.01	32.9b	22.3c	97.0a	31.3b
Cu		<0.01	6.3b	4.2d	9.0a	4.7c