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2. Acre-foot - Wikipedia

   en.wikipedia.org/wiki/Acre-foot

   Since an acre is defined as a chain by a furlong (i.e. 66 ft × 660 ft or 20.12 m × 201.17 m), an acre-foot is 43,560 cubic feet (1,233.5 m 3). There has been two definitions of the acre-foot (differing by about 0.0006%), using either the international foot (0.3048 m) or a U.S. survey foot (exactly ⁠ 1200 / 3937 ⁠ meters since

3. Acre - Wikipedia

   en.wikipedia.org/wiki/Acre

   One acre equals 1 ⁄ 640 (0.0015625) square mile, 4,840 square yards, 43,560 square feet, [2] or about 4,047 square metres (0.4047 hectares) (see below).While all modern variants of the acre contain 4,840 square yards, there are alternative definitions of a yard, so the exact size of an acre depends upon the particular yard on which it is based.

4. Section (United States land surveying) - Wikipedia

   en.wikipedia.org/wiki/Section_(United_States...

   After the Civil War, freedmen (freed slaves) were reckoned to be self-sufficient with "40 acres and a mule." In the 20th century real estate developers preferred working with 40-acre (16 ha) parcels. [2] The phrases "front 40" and "back 40," referring to farm fields, indicate the front and back quarter-quarter sections of land.

5. Public Land Survey System - Wikipedia

   en.wikipedia.org/wiki/Public_Land_Survey_System

   In the original Homestead Act of 1862, during the Lincoln administration, each settler was allocated 160 acres (0.65 km 2) of land, a quarter-section. Later amendments of the Homestead Act allocated more land, as much as 640 acres (2.6 km 2), a section. This was a good revision to apply to land that was drier or more desolate than the earlier ...

6. California reports the first increase in groundwater supplies ...

   www.aol.com/news/california-reports-first...

   The state saw 4.1 million acre-feet of managed groundwater recharge in the water year ending in September, and an 8.7 million acre-feet increase in groundwater storage, California’s Department ...

7. Lot and block survey system - Wikipedia

   en.wikipedia.org/wiki/Lot_and_block_survey_system

   A contemporary plat map used in the lot and block system. The lot and block survey system is a method used in the United States and Canada to locate and identify land, particularly for lots in densely populated metropolitan areas, suburban areas and exurbs.