[Spatial variability of soil nitrogen and related affecting factors at a county scale in hilly area of Mid-Sichuan Basin].

Spatial distribution characteristics of soil total nitrogen ( TN ) and available nitrogen ( AN ) were analyzed by using geostatistical methods and the effects of the influencing factors were quantified by regression analysis based on 555 soil samples collected in RenShou county. The results showed that the contents of soil TN ranged from 0.34-2.

[Spatial variability of soil C/N ratio and its influence factors at a county scale in hilly area of Mid-Sichuan Basin, Southwest China].

Spatial distribution characteristics of soil C/N ratio and its affecting factors at a county scale in hilly area of Middle Sichuan Basin were analyzed based on field sampling. Result indicated that soil C/N ranged from 4.84 to 21.