land surveying under the Public Land Survey System (PLSS), a section is an area nominally one square mile (2.6 square kilometers), containing 640 acres (260 hectares), with 36 sections making up one survey township on a rectangular grid. The primary grid pattern is of quarter sections ( 1⁄ 2 mi × 1⁄ 2 mi (800 m × 800 m)). Satellite image of crops growing in Kansas, mainly using center pivot irrigation.
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