Table 2 Correlation coefficients between TN and its fractions.

From: The influence of a year-round tillage and residue management model on soil N fractions in a wheat-maize cropping system in central China

Parameter

TN

PON

MBN

WEON

Mineral N

TN

1

    

PON

0.964**

1

   

MBN

0.989**

0.968**

1

  

WEON

0.956**

0.945**

0.976**

1

 

Mineral N

0.607**

0.545*

0.535*

0.478*

1

  1. TN: soil total nitrogen, PON: particulate organic nitrogen, MBN: microbial biomass nitrogen, WEON: water-extractable organic nitrogen. **Significant at P < 0.01, *Significant at P < 0.05.
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