Criteria

Unit

Optimal

Suboptimal

Inadequate

Average Annual

Temperature

˚C

25 - 30

18 - 24

30 - 35

>than 35

Annual Rainfall

mm

1000 - 2000

650 to 1000

2000 to 2500

Less than 650

Higher than 2500

Altitude

msnm

0 - 1500

1500 - 2000

Higher than 2000

Soils

Types

Fluvisols

Regosols

Luvisols

Nitisols

Andosols

Phaeozem

Castañozems

Cambisols

Solonchak’s

Leptosols

Vertisols

Gleysols

Arenosols

Calcisols

Texture

Types

Loamy

Sandy

Clay

Depth

m

1

1 to 0.5

pH

Indicator

5.5 to 6.5

5.0 to 5.4

6.5 to 7.5

>than 7.5

Light Hours

Hours

Higher than 3000

2500 to 3000

Less than 2500

Drainage

Types

Good

Good

Deficient