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2. Agricultural fencing - Wikipedia

   en.wikipedia.org/wiki/Agricultural_fencing

   In agriculture, fences are used to keep animals in or out of an area. They can be made from a wide variety of materials, depending on terrain, location and animals to be confined. Most agricultural fencing averages about 4 feet (1.2 m) high, and in some places, the height and construction of fences designed to hold livestock is mandated by law.

3. Center-pivot irrigation - Wikipedia

   en.wikipedia.org/wiki/Center-pivot_irrigation

   A satellite image of circular fields characteristic of center pivot irrigation, Kansas Farmland with circular pivot irrigation. Center-pivot irrigation (sometimes called central pivot irrigation), also called water-wheel and circle irrigation, is a method of crop irrigation in which equipment rotates around a pivot and crops are watered with sprinklers.

4. Glossary of agriculture - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_agriculture

   (pl.) aboiteaux A sluice or conduit built beneath a coastal dike, with a hinged gate or a one-way valve that closes during high tide, preventing salt water from flowing into the sluice and flooding the land behind the dike, but remains open during low tide, allowing fresh water precipitation and irrigation runoff to drain from the land into the sea; or a method of land reclamation which relies ...

5. Fence - Wikipedia

   en.wikipedia.org/wiki/Fence

   Typical agricultural barbed wire fencing Sioux Mems Pro2 Split-rail fencing common in timber-rich areas A chain-link wire fence surrounding a field Portable metal fences around a construction site A snow-covered vaccary fence near Ramsbottom in Greater Manchester, UK Between fence and hedge: Acanthocereus tetragonus, laid out as a "living fence", rural area, Cuba

6. Barbed wire - Wikipedia

   en.wikipedia.org/wiki/Barbed_wire

   As with any fence, barbed wire fences require gates to allow the passage of persons, vehicles and farm implements. Gates vary in width from 3.5 metres (12 ft) to allow the passage of vehicles and tractors, to 12 metres (40 ft) on farm land to pass combines and swathers.

7. Electric fence - Wikipedia

   en.wikipedia.org/wiki/Electric_fence

   Changes in laws. In some jurisdictions, certain types of electrical outputs for fences were unlawful until the 1950s or 1960s. In other areas, signage requirements and other restrictions limited usability. Many US cities continue to have outdated laws prohibiting electric fences to prevent agricultural fences from entering the city.