Tóth T. és Kuti L. 2002. Numerical simulation versus repeated field instrumental 
measurements: a case study of monitoring salinity status in a native sodic 
grassland with shallow groundwater. Agrokémia és Talajtan. 51:243-252

Within a 300 x 600 m complex heterogeneous sodic grassland two tech-niques were 
compared for assessing soil salinity. The standard technique is based on 
repeated field instrumental measurements at 420 points. The alter-native 
technique was performed with the use of numerical simulation of salt 
accumulation carried out on 3 profiles. These profiles have been selected as 
representatives of the distinct classes, or map strata of salt accumulation, 
dis-tinguished with preliminary statistical clustering of the instrumental 
measuring points. Simulated values were extrapolated for the 3 strata 
distinguished. The maps obtained with the two techniques were statistically 
correlated. The use of numerical simulation is cost-effective. Further 
improvements are expected from a combination of improved numerical simulation 
and utilization of more strata.