John Fenton, manager of a 7,000-acre estate in Humberside, is working with a Danish combine harvester manufacturer, Dronningbourg, on a method of using computers to map levels of fertility in different parts of a field. ..... It never occurs to most of us that a field of wheat is anything but a uniform whole. But the crop produced in one part of a field can be three times that of another.
――東京大学 〔4〕―(B)――94年