Territorial and temporal extension of the results of long-term field experiments

Abstract

Agronomic experiments resemble dialogues with the plant, the soil, and the studied medium in general. The results of long-term field experiments are only valid for a given territorial unit and a given time interval, so if they are to be used by the agronomic advisory service as an exact scientific basis for a larger area and for a longer period, the measured point and minute information must be extended and validated in space and time. The paper emphasizes the unavoidable necessity of this extension, summarizes the limitations and difficulties, introduces various alternative solutions and discusses their practical applicability.