Irrigation ditches-Trenches dug into land to allow water to flow, sometimes at a great distance from its source. This provides water for crops and for humans.
The cottonwood tree (Populus fremontii) grows 40 to 80 feet in height. It has a broad open crown of widely spreading branches. Cottonwoods grow only in wet soil and are found along lakes, riverbanks and irrigation ditches throughout the southwest.
 See also: Irrigation, Soil, Light, Level, Spring
  
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