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Banana guide: conversion tables

Table 1: Conversion coefficients between nutrient forms

From

To

Multiply by

From

To

Multiply by

P

P2O5

2.29

P2O5

P

0.44

P

PO4

3.06

PO4

P

0.32

H3PO4

H2PO4

0.9898

H2PO4

H3PO4

1.01

K

K2O

1.20

K20

K

0.83

Ca

CaO

1.40

CaO

Ca

0.71

Mg

MgO

1.66

MgO

Mg

0.60

S

SO3

2.50

SO3

S

0.40

S

SO4

3.00

SO4

S

0.33

N

NH4

1.28

NH4

N

0.82

N

NO3

4.43

NO3

N

0.22

 

Table 2: Conversion coefficients between nutrient concentration expressions

From

Correspondent element (mg)

1 mmol

Correspondent element (mg)

Weight of ion

NH+

14 mg N

NH4+

14 mg N

18 mg NH4+

NO3

14 mg N

NO3

14 mg N

62 mg NO3-

H2PO4

31 mg P

H2PO4

31 mg P

71 mg P2O5

HPO2

31 mg P

HPO2

31 mg P

35,5 mg P2O5

HPO2-

15.5 mg P

K+

39 mg K

47 mg K2O

K+

39 mg K

Ca2+

40 mg Ca

28 mg CaO

Ca2+

20 mg Ca

Mg2+

24 mg Mg

20 mg MgO

Mg2+

12 mg Mg

SO42

32 mg S

48 mg SO4

SO2

16 mg S

Na+

23 mg Na

-

Na+

23 mg Na

CI

35.5 mg Cl

-

 

Table 3: Conversion coefficients between agronomic units

From

To

Multiply by

From

To

Multiply by

Acre

Hectare

0.405

Hectare

Acre

2.471

Kilogram

Pound

2.205

Pound

Kilogram

0.453

Gram

Ounce

0.035

Ounce

Gram

28.35

Short ton

Metric ton

0.907

Metric ton

Short ton

1.1

Gallon (US)

Liter

3.785

Liter

Gallon (US)

0.26

kg / ha

lb / acre

0.892

lb / acre

kg / ha

1.12

MT / ha

lb / acre

892

lb / acre

MT / ha

0.001