Variables

Groups

1

2

3

4

N-rate (kg∙ha⁻¹)

<30

30 - 60

60 - 100

>100

MAP (mm)

<700

700 - 1100

>1100

MAT (˚C)

<16

16 - 22

>22

Soil texture

Clay

Loam

Sand

Soil pH

<6

6 - 7

>7

AP (mg∙kg⁻¹)

Extremely low

Low

Moderate

High

SOC (g∙kg⁻¹)

Extremely low

Low

Moderate

High