In this paper the modeling of soil surface roughness by Boolean random
functions is presented. The interest of this class of functions is to
be able to model explicitly the cloddy aspect of the soil through the
use of primary functions. From a statistical point of view, the heigh
t distribution function for such models is easily got, so that classic
al estimation and modeling methods are available. The case of parametr
ic and non-parametric estimation of the intensity function, and the ca
se of the modeling of the non-stationarity induced by tilling;Ire pres
ented.