Land qualities

S₁

(100 - 85)

S₂

(84 - 60)

S₃

(59 - 40)

N₁

(39 - 20)

N₂

(19 - 0)

Climate (c):

Annual rainfall (mm)

1800 - 2500

1250 - 1799

1000 - 1250

500 - 1000

< 500 > 2500

Mean annual temp (^oC)

24 - 33

20 - 22

> 33 < 20

any

Any

Relative humidity (%)

70 - 75

65 - 70

50 - 65

30 - 50

< 30

Topography (t)

Slope (%)

0 - 3

4 - 8

9 - 16

16 - 45

> 45

Wetness (w):

Flooding

F0

F1

F2

F3

F4

Drainage

WD

MWD

MD

PD

VPD

Soil physical properties (s):

Texture

CL, SCL, L

SCL

SCL - LFS

Any

C, Cs,

Structure

blocky

any

any

any

massive, single grain

Depth (cm)

> 100

50 - 100

25 - 49

20 - 25

< 25

Fertility (f):

Cation exchange capacity (cmol_ckg^-1)

> 10

6 - 10

< 6

any

Any

Base saturation (%)

> 35

< 20

any

any

Any

pH (H₂O)

6.5 - 7.0

5.5 - 6.0

< 5.5; > 7.0

< 4; > 7.0

< 4; > 7.0

Organic carbon (gkg^-1), 0 -15 cm

> 8

< 8

-

-

-

Available P (mgkg^-1)

> 22

13 - 22

7 -13

3 - 7

< 3

Exchangeable K (cmol_ckg^-1)

> 0.5

0.3 - 0.5

0.2 - 0.3

0.1 - 0.2

< 0.1

Exchangeable Mg (cmol_ckg^-1)

2 - 5

1 - 2

< 1

< 1; > 5

Any

Exchangeable Ca (cmol_ckg^-1)

10 - 15

5 - 10

1 - 5

< 1; > 5

Any