. 1999 Jun;65(6):2758–2761. doi: 10.1128/aem.65.6.2758-2761.1999

TABLE 1.

Characteristics of plants and soil

Site and date sampled	Plant species	Soil pH	Fe concn in:			Organic carbon content of soil (%)^b	Soil composition
Site and date sampled	Plant species	Soil pH	H₂O^a (μM)	Plaque (μmol of Fe/g [dry wt])	Bulk soil (μmol of Fe/g [dry wt])	Organic carbon content of soil (%)^b	% Sand^c	% Silt	% Clay
Neutral tributary, July 1997	S. australis	6.25	65.9	6,256.6	2,544.0 ± 555.3	11.0 ± 0.3	70.3 ± 4.9	23.9 ± 7.1	5.85 ± 2.2
Acidic stream
October 1997	J. effusus	3.67	51.1	1,230.1	868.3 ± 122.0	6.7 ± 0.2	76.6 ± 3.9	14.4 ± 5.7	9.1 ± 1.8
	L. oryzoides	4.45	22.4	771.8	2,418.1 ± 116.3	11.0 ± 0.1	75.9 ± 1.7	12.0 ± 4.0	12.1 ± 5.6
	Unknown sedge	4.57	57.6	4,027.7	941.7 ± 81.3	4.9 ± 0.3	81.7 ± 1.8	7.7 ± 1.9	10.6 ± 0.1
November 1998	L. oryzoides	3.49	288.2	302.1

The dissolved-Fe concentration was determined by the ferrozine assay.

Determined by loss upon ignition in muffle furnace (8).

Soil texture was determined by the hydrometer method (9).