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Port Silt Loam is the state soil of Oklahoma. This type of soil is reddish in color due to the weathering of reddish sandstones, siltstones, and shales of the Permian period. It is a medium-textured alluvial soil deposited along flood plains. Port Silt Loam can be found in 33 of the 77 counties in Oklahoma and covers around one million acres ...
By 1930, Rand McNally had two major road map competitors, General Drafting and Gousha, the latter of which was founded by a former Rand McNally sales representative. The Rand McNally Auto Chum, later to become the ubiquitous Rand McNally Road Atlas, debuted in 1924. The first full-color edition was published in 1960 and in 1993, it became fully ...
In the US, a Basic Trading Area is a geographic region defined originally in the Rand McNally Commercial Atlas and Marketing Guide and used by the FCC where a Personal Communications Service can operate. [1] It consists of the counties surrounding a city designated as the basic trading center. [2]
A map of the McClellan–Kerr Arkansas River Navigation System. The McClellan–Kerr Arkansas River Navigation System (MKARNS) is part of the United States inland waterway system originating at the Tulsa Port of Catoosa and running southeast through Oklahoma and Arkansas to the Mississippi River. The total length of the system is 445 miles (716 ...
Topsoil is composed of mineral particles and organic matter and usually extends to a depth of 5-10 inches (13–25 cm). Together these make a substrate capable of holding water and air which encourages biological activity. There are generally a high concentration of roots in topsoil since this is where plants obtain most of their vital nutrients.
The Geography of Oklahoma encompasses terrain and ecosystems ranging from arid plains to subtropical forests and mountains. Oklahoma contains 10 distinct ecological regions, more per square mile than in any other state by a wide margin. [1] It is situated in the Great Plains and U.S. Interior Highlands region near the geographical center of the ...
A new study ranking the cleanest and dirtiest lakes in the U.S. places three Oklahoma lakes among the top 10 dirtiest lakes in the country.
Auto trail. The system of auto trails was an informal network of marked routes that existed in the United States and Canada in the early part of the 20th century. Marked with colored bands on utility poles, the trails were intended to help travellers in the early days of the automobile. Auto trails were usually marked and sometimes maintained ...
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