Table 3.

Soil pH and nutrient concentrations beneath red maple (Acer rubrum) trees at four urban sites in the eastern United States in spring 2007. Within a site and column, means following by different letters are significantly different (SAS PROC GLIMMIX, Fisher’s LSD P < 0.05). For treatment descriptions, see Materials and Methods.

Site	Treatment	pH	NO₃ (ppm)	P (kg/ha)	K (kg/ha)	Ca (t/ha)	Mg (kg/ha)	Zn (kg/ha)	Mn (kg/ha)	Cu (kg/ha)	B (kg/ha)
Anderson	C	6.1bc	1.3a	7.3b	182.2c	1.2b	132.8c	2.6b	45.7a	2.4b	0.7b
	AFM	6.7a	1.2a	22.4a	306.4a	1.9ab	355.5a	6.8a	60.0a	4.9a	1.3ab
	A	6.2bc	0.7a	6.9b	212.1bc	1.3b	141.5bc	2.5b	45.7a	2.9ab	0.6b
	F	6.0c	1.0a	9.2b	204.1b	1.2b	171.6bc	2.6b	54.7a	2.7b	0.6b
	M	6.5ab	1.2a	5.0b	233.3bc	2.2a	180.0b	4.0b	56.2a	2.0b	1.6a
Boston	C	5.7b	2.8ab	96.7b	126.4b	2.0cd	206.5c	10.0bc	44.6b	6.3a	0.6b
	AFM	6.6a	3.3ab	268.0a	167.1a	5.6a	364.7a	25.6a	66.1a	3.2b	1.0a
	A	5.8b	4.2a	100.7b	121.7b	1.9d	188.6c	7.8c	36.8b	6.2a	0.4c
	F	6.0b	4.1a	118.7b	124.1b	2.4bc	215.3bc	10.9bc	44.9b	6.3a	0.6b
	M	5.8b	1.9b	94.0b	115.2b	2.5b	239.6b	12.7b	57.1a	3.8b	0.6b
Myrtle Beach	C	7.2ab	1.9a	61.8ab	83.2a	5.2a	101.8b	3.6b	15.8b	0.7b	0.6a
	AFM	6.4b	0.9a	53.2ab	103.4a	6.8a	205.0a	5.3b	31.8a	0.8ab	0.7a
	A	7.3ab	1.6a	48.0b	84.7a	6.6a	134.0ab	4.8b	17.8b	0.8ab	0.6a
	F	6.2ab	1.2a	75.4a	102.9a	6.0a	132.7ab	9.0a	40.3a	1.6a	0.7a
	M	7.6a	1.3a	71.9ab	113.9a	6.3a	150.5ab	5.9b	17.4b	1.0ab	0.8a
Pittsburgh	C	6.1b	4.8a	97.6b	350.8ab	4.3a	409.7a	11.9a	77.4bc	1.8b	1.2bc
	AFM	5.9b	2.0c	134.8a	383.9ab	5.2a	406.3a	11.9a	111.2b	2.0b	1.7ab
	A	6.3b	3.9ab	117.9ab	320.5b	4.4a	467.2a	7.7b	67.8c	1.8b	1.1c
	F	4.8c	2.0c	88.7b	243.9c	4.8a	281.1b	10.5ab	168.9a	6.2a	0.6d
	M	6.8a	2.7bc	107.5ab	400.0a	5.7a	502.2a	8.0b	80.9bc	1.2b	1.8a