Kertész M., and T. Tóth. 1994. Soil survey based on sampling scheme adjusted to 
local heterogeneity. Agrokémia és Talajtan. 43:113-132

The aim was to map the soil and vegetation of a salt-affected landscape in order 
to provide reliable information for the management of a nature conservation 
area. The target variable was the catena position which integrates knowledge on 
the soil and vegetation. Efficient mapping requires the utilization of knowledge 
about relationships between the variables mapped. Spatial autocorrelations and 
between-attributes correlations were treated separately. Regarding the former, a 
formal solution is suggested taking spatial heterogeneity into consideration by 
designing sampling of uneven spatial density according to the satellite image of 
the pilot area. Regarding the latter, the determination of easly measurable 
chemical properties were chosen, i.e. pH, pNa and EC, utilizing their 
correlations with very important but tedious SAR measurements, and samples were 
only taken from the top 30 cm. The close relation between natural-seminatural 
vegetation and soil properties can be used to estimate the latter if plant 
associations are identified. It is intended to apply the probabilistic approach 
in the interpolation of the catena position types and in the prediction of soil 
properties. The use of remotely sensed images is planned not only in sampling 
design but in determining catena positions as well.