Soil quality grades*

Indicator method

Index

I II III IV V

<0.545

0.545 - 0.584

0.584 - 0.631

0.631 - 0.678

>0.678

TDS

IQI

<0.438

0.532 - 0.438

0.602 - 0.532

0.602 - 0.675

>0.675

MDS

<0.370

0.370 - 0.404

0.404 - 0.436

0.436 - 0.472

>0.472

TDS

NQI

<0.264

0.264 - 0.340

0.340 - 0.385

0.385 - 0.427

>0.427

MDS