Land use changes and runoff affect the distribution of soil nutrients and 137Cs.
Loss of SON, SOC and 137Cs is related to soil loss by water erosion and tillage.
The effect of soil redistribution on SOC dynamics is evidenced in the study field.
Distribution of grain size fractions is linked to SOC, SON and 137Cs patterns.
Reduced tillage practices favor the increase of soil nutrients in topsoils.