148 Soils of the Far Went. 



PECOS SERIES AND ASSOCIATED SOILS. 



These soils are derived from lacustrine deposits and stream 

 wash, and are usually very calcareous. 



Pecos conglomerate. — Sandy loam to a depth of 2 feet, containing 

 a liigh percentage of rounded gravel, resting upon conglomerate or 

 gravel beds. Bench land and bluffs. Soil derived from disinte- 

 gration of conglomerate beds; well drained and free from alkali 

 salts; readily transmits seepage waters. Not adapted to any agri- 

 cultural purpose at present. 



1 2 3 4 ' 



isoil (2) 3 56 17 18 



Acres. 

 Pecos Valley, N. Mex 11,680 



Pecos sand. — Fine sand, 6 feet or more in depth, except where 

 drifted over other formations. Lies along rivers by which it has 

 been transported from the mountains. The action of the wind has 

 extended the areas, and the surface is usually covered with dunes. 

 The soil is calcareous and contains small amounts of alkali, though 

 not enough to injure plants. Characteristic vegetation: Mesquite, 

 willow, canaigre, yucca, and cottonwood. Generally well drained. 

 Adapted to truck, fruit, melons, potatoes, and root crops. 



12 3 4 



Soil (1) 1 55 37 7 



Subsoil (1) 2 62 33 3 



Acres. 



Pecos Valley, N. Mex 2, 810 



Salt River Valley, Ariz i:<,960 



Solomonsville, Ariz (i, 720 



Pecos sandy loam. — Soil is a fine-grained gray sandy loam, 80 

 inches deep; sul)soil is a gray light loam, slightly heavier than 

 the soil. Occupies high, level valley land. Derived from lacus- 

 trine deposits; well drained and generally free from alkali. Recog- 

 nized as the best general farming land. 



1 i 3 4 



Soil (7) 3 46 25 IS 



Subsoil (1) 36 27 31 



Acres. 



Pecos Valley, N. Mex 24, 770 



Roswcll, N. Mex 11,540 



