The papers presented support the summaries of McBratney and Odeh (1997) and Jetter and Kok (2014), who stated during the detailed evaluation of the present state of fuzzy modelling, that fuzzy systems and models may be the important research methods of the future. "Soft" computing methods are gaining ever more ground in the field of soil, agricultural and environmental sciences. The possibility of setting boundaries that are not defined as categories with precisely set, distinctive definitions, and of working with data that are not easily quantifiable and insecure presents a great advantage. Provided a satisfactory mathematical and interdisciplinary research background is available, this is a comparatively simple, fast and cost-effective method, which is more exact than conventional ones, and which supplies results that can also be understood by laymen.