S1

S2

S3

N

Source

Rainfall

250 - 350 mm

150 - 250 mm

350 - 600 mm

75 - 150 mm

>600

<75 mm

[20]

Temperature

30˚C - 21˚C

18˚C - 21˚C

15˚C - 18˚C

<15˚C

>30˚C

[21]

Soil pH

6.2 - 7.2

5 - 6.2

7.2 - 8.0

>8.0

<5.0

[14] [22]

Drainage

Well-drained

Imperfectly drained

Poorly drained,

Rapidly drained

Very poorly drained

[14] [23]

Texture

Loam

Sandy Loam

Clayey

Very clayey

Extremely sandy

-

[14] [23]

CEC

>10 meq/100g

5 - 10 meq/100g

0 - 5 meq/100g

-

[14] [22]

Depth

>50 cm

30 - 50 cm

<30 cm

[14] [23]

Altitude

0 - 1600 m

1600 - 2000 m

-

>2000 m

<0 m

[14] [22]