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This paper concerns the characteristics of agricultural land problems in multi-farming areas. The production structure of these areas includes various types of arable land, farm forms and localities. It is necessary to draw up a typical type of agricultural land fluidity considering these factors. By analysis of statistical data about land fluidity in the field, it is noticeable that vegetable-introducing farms purchased a large amount of land. In addition, these purchasing prices were relatively high. According to the field survey into these types of farms, it was found that a new type of farm management such as an agricultural corporation is assuming these lands.

A thin-film limiting current type oxygen sensor with graded-composition layer electrodes has been developed. Sensor resistance was governed by the electrode interface resistance. However, it was not clear whether anode or cathode effects were dominant. In this study, three kinds of electrodes with different interface structures (laminated, mixed, and graded-composition layers) were applied to anode and cathode, and their influences on sensor resistance were investigated. The sensor using the graded-composition layer electrodes showed the lowest resistance, as well as excellent low-temperature activity and stability. The sensor with the laminated electrode for cathode and the graded-composition layer for anode showed interface resistance 50% lower than the inverse configuration. Anode performance was a governing factor in overall sensor resistance.