Average

Median

StDev

Rel Error vs. FeAlO

Average

Median

StDev

% Error vs. FeAlO

RFA (mg P/kg soil)

(%)

ICP (mg P/kg soil)

(%)

FeAlO

58.2

31.9

103.6

-

74.7

39.4

137.2

-

H3A-3

58.1

32.6

104.3

−0.2%

69.4*

38.7

130.9

−7%

M3

142.4*

84.8*

315.4

145%

155.9*

96.6*

330.9

109%

Water

10.8*

23.4*

31.9

−81%

14.9*

6.8*

42.4

−44%