Table 3 Correlations between examined methods in terms of K content in the soil.

From: The effect of broadcast struvite fertilization on element soil content and microbial activity changes in winter wheat cultivation in southwest Poland

Variable

Correlations determined by correlation coefficient when significant at P < 0.05000 N = 72

Average

Standard deviation

K Egner–Rhiem

K Mehlich 3

K Yanai

K Egner–Rhiem

8.04

1.33

1.00

0.39

− 0.22

K Mehlich 3

111.2

17.68

0.39

1.00

− 0.37

K Yanai

88.97

27.83

− 0.22

− 0.37

1.00

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