Table 3.

Nitrogen (N), organic carbon (Org. C) and organic matter (O.M.) contents of B. pseudomallei positive and negative samples; U: Mann-Whitney’s U test; n: sample size; significance level: NS: non significant; *p < 0.05, **p < 0.01.

	N (g kg−1)			Org. C (g kg−1)			O.M. (g kg−1)
	Positive	Negative	U	Positive	Negative	U	Positive	Negative	U
April 2011	0.29	0.47	260*	2.37	4.56	260.5*	4.11	7.90	261*
n	25	33		25	33		25	33
June 2011	0.38	0.56	53NS	3.14	5.56	47NS	5.44	9.62	47NS
n	6	25		6	25		6	25
Nov. 2011	0.33	0.53	106NS	2.80	5.28	104.5NS	4.85	9.13	105NS
n	13	26		13	26		13	26
April 2012	0.30	0.51	238**	2.60	5.03	242.5*	4.5	8.70	243*
n	32	25		32	25		32	25