Conservation of natural resources in South Texas is basically a modern development that parallels the evolution of the Soil Conservation Service and other federal agricultural agencies. Since the World War II era, Hispanic producers have played an important role in adopting new conservation practices to conserve and enhance the value of their lands. Initially, the region was a natural grassland devoted to ranching, but farm development in the early twentieth century led to a sharp increase in irrigated farmland along the Rio Grande. Conservation practices during the long period of extensive ranching were ineffective. As a result, by the twentieth century much of the grasslands were turned into brushland due to overgrazing, the disuse of fires to suppress weeds and useless shrubs, soil compaction, and soil and wind erosion. Hispanic farmers and ranchers had to be convinced that new practices were beneficial. The cooperation of SCS, ASCS, and other agencies facilitated the work of introducing new practices, such as disking, root plowing, seeding of new grasses, and range management practices. Farmers also benefited from new practices. Construction of Falcón Dam in 1954 was a great boost to water conservation and flood control. The last forty years have seen a rapid growth in wildlife ranches and the sale of rangelands to prosperous professionals and businessmen and women. At present, three thousand Hispanic producers are dedicated to conserving their water and soil resources, adapting to these two new developments.

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11 Noe Martinez, personal interview, Rios Community, Duval County, Texas, July 3, 2001
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Angel Vela, "Report on Soil Conservation Work in Starr County," MA thesis, Texas College of Arts and Industries (now Texas A&M University-Kingsville, 1952), 84–86, 93
Antolin Gonzales Jr., interview, Harlingen, Texas, June 23, 2001
Gonzales served as a conservationist in various locations in South Texas from 1970 to June 2001
Evan J. Quiros, interview, Laredo, Texas, June 8, 2001
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13 Omar J. Garza, interview, Rio Grande City, Texas, Nov. 3, 2000
14 Evan J. Quiros, interview, Laredo, Texas, June 8, 2001
17 Jacqueline E. Timm , "Rio Grande Flood Control," in
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Dick D. Heller Jr., "International Falcon Reservoir," in
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20 Rafael Guerra, interview; Carlos Guerra, personal communication, July 3, 2000
21 Guerra Jr., interview, July 14, 2001.
22 Nelda Garcia, interview, La Bandera, Jim Wells County, Texas, July 12, 2001.
23 Alejandro Montemayor Jr., interview, San Jose Community, Duval County, Texas, July 19, 2001.
24 Uvaldo Salinas, interview, El Sauz, Texas, June 2, 2001
Salvador Salinas, interview, Temple, Texas, July 20, 2001
26 Monte Mucho Soil and Water Conservation District, Annual Report, Aug. 31, 1996, n.p., Aug. 21, 2000, n.p.
Saenz, interview; Alvaro Luna, personal communication, Laredo, Texas, June 13, 2001
Arturo Ibarra, personal communication, Rio Grande City, June 27, 2001
Erasmo Montemayor, personal interview, Hebbronville, Texas, July 3, 2001
Zaragoza Rodriguez III, personal communication, Nov. 26, 2003
28 Juan M. Campos, M.D., interview, Sharyland, Texas, July 14, 2001
Guerra Jr., interview, July 14, 2001
29 Lehmann, Forgotten Legions, 137-40,149-50