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Series 1936, No. 10 Issued January 1942
SOIL SURVEY OF MAVERICK COUNTY, TEXAS
By HOWARD M. SMITH, Division of Soil Survey,l Bureau of Plant Industry, United States
Department of Agriculture, in Charge, and R. M. MARSHALL and I. C. MOWERY, Texas
Agricultural Experiment Station
Area inspected by WILLIAM T. CARTER, Inspector, District 4
United States Department of Agriculture in cooperation with the
Texas Agricultural Experiment Station
CONTENTS
Page Page
County surveyed -------
---------------
1 Soils and crops-Continued.
Climate -.--------------------------------
9 Soils of moderate to low productive capacAgricultural
history and statistics----------
11 ity--------------
-----------------
36
Soil-survey methods and definitions---------
15 Medium-textured soils ----------------
36
Soils and crops ----
16 Maverick clay loam -------------
36
Soils of high to moderate productive capac
Zapata silty clay loam ------------
37
ity ----------
21 Sandy soils -
-----------------
38
Medium-textured soils -------
-----
21 Laredo loamy very fine sand-------
38
Laredo silt loam---------
--------
21 Clay soils--
-----------
-----
38
Laredo loam.----------
-----
22 Leonaclay ------------------
38
Laredo silty clay loam --
----
22 Maverick clay ---------------------
39
Uvalde silty clay loam-
--
23 Miscellaneous soils and land types unsuited
Uvalde silty clay loam, high phase ---
24 to cultivation.------
-----------
40
Reagan silty clay loam ..--------
25 Zapata fine sandy loam -----------
40
Monteola clay loam -------------
25 Zapata loam-----------
-----
41
Reagan loam
-----
26 Reagan gravelly loam---------------
41
Reagan loam, colluvial phase------
27 Webb gravelly fine sandy loam --
42
Light-textured soils -----
-------
27 Randall clay -------------
---
42
Laredo very fine sandy loam---------
27 Rough stony land -------------. 43
Laredo fine sandy loam
-------
28 Rough broken land ----------
43
Alluvial soils, undifferentiated------
29 Land uses and agricultural methods -----
43
Webb fine sandy loam -----
---
29 Productivity ratings-.. ---
47
Maverick fine sandy loam ------
31 Correlation of soil types with native vegetation 51
Crystal fine sandy loam--
----
--
31 Irrigation ---------------
----
53
Clay soils --
----------------------
33 Morphology and genesis of soils.---------
56
Uvalde clay ----------
-----
33 Summary ------
---------------------
60
Monteola clay ----
-----
-----
34 Map.
COUNTY SURVEYED
Maverick County is in southwestern Texas, adjacent to the Rio
Grande, the international boundary between the United States and
Mexico (fig. 1). It is part of that section of Texas locally referred
to as the Winter Garden district. Eagle Pass, the county seat and
largest city, is a port of entry from Mexico, on the Rio Grande at the
western edge of the county, opposite Piedras Negras, Coahuila,
Mexico. It lies about 150 miles southwest of San Antonio, the
regional metropolis, and 280 miles northwest of Corpus Christi, the
nearest seaport on the Gulf of Mexico. The area of the county is
1,278 square miles, or 817,920 acres.
The county lies in the southwestern part of the Rio Grande Plain,
a smoothly undulating to gently rolling subdivision of the Coastal
Plain province, which extends southeastward from the Edwards
Plateau to the Gulf of Mexico. The general regional slope is southeasterly.
In places within the county the normal plain has been
modified through earth movements that caused faults. These faults
are apparent on the surface, in the form of bluffs near the Rio
I The field work for this survey was done while the Division was a part of the Bureau
of Chemistry and Soils.
1