Resembling a work of modern art, variegated green crop circles cover what was once shortgrass prairie in south-western Kansas.

在堪萨斯州的西南部，曾经的短草牧场因为被圆形的饲料作物田地点缀而变得斑驳起来，整张图片宛如一幅美妙的现代艺术作品。

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The mourners filed carefully between the muddy rows of lustrous green wheat, careful not to trample the young crop.

哀悼者在长满绿油油麦苗的田垄之间小心行进，以免践踏到幼嫩的庄稼。

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When I was there earlier this month, the gorgeous green crop was galloping from pond to pond as far as the eye could see.

WSJ: Watercress, Springtime's Superfood

The software makes estimates on acres planted and projected yields by analyzing the soil color, how green the crop is and the rate at which the color changes.

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Many African countries are looking to the crop-driven "green revolution" of Asia for ideas, but Ms Sibanda points out that what Africa needs is a "rainbow" revolution.

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