Indicator | Type | x1 | x2 | Function |
SOM (g∙kg−1) | M (x) | 6 | 20 |
|
TN (g∙kg−1) | M (x) | 0.3 | 1.2 | |
AP (mg∙kg−1) | M (x) | 5 | 15 | |
AK (mg∙kg−1) | M (x) | 40 | 200 | |
EC (mS∙cm−1) | L (x) | 0.2 | 4 | |
BD (g∙cm−3) | L (x) | 1.25 | 1.55 | |
Clay % | R (x) | 5 | 40 | |
pH | R (x) | 5.5 | 9.5 |