Mineral†

Fayetteville

Kibler

Ratio‡

F test§

Optimum range¶

P

0.3

0.4

1.14

NS

0.1 - 0.5

K

2.1

2.3

1.05

NS

0.5 - 0.6

Ca

1.1

1.1

0.95

NS

0.2 - 1

Mg

0.3

0.4

1.43

***

0.1 - 0.4

S

0.3

0.3

0.98

NS

0.25 - 0.3

Fe

126

179

1.42

**

50 - 250

Mn

61

40

0.66

**

20 - 500

Zn

34

43

1.27

*

25 - 150

Cu

10

9

0.99

NS

5 - 20

B

27

42

1.56

***

20 - 60