Table 1. Selected characteristics of the animal manures used in this study.

Manure	pH†	Al‡	Ca	Fe	Mg	Mn	P	C	N	C/N Ratio§
		g kg−1 dry weight						mg kg−1
Dairy manure	8.3	0.97	17.4	1.3	11	0.2	7	39	2	20
Swine manure	8.2	0.87	51.1	1.1	10	0.4	32	37	3	12
Broiler litter	6.4	0.59	24.2	0.7	7.6	0.2	14	36	5	7

Note:

^†pH was determined on a 10:1 water (mL) to dry matter ratio (g).

^‡Total elements in three animal manures determined by microwave digestion in concentrated HNO₃ and H₂O₂ and detection by ICP-OES

^§Total nitrogen and carbon in three animal manures determined by Vario MACRO CN.