Abstract
The area studied is located in the arid zones of the States of Nuevo León and Coahuila, within the Don Martin irrigation district. It has an extension of 50,000 hectares of which, at present, only 16,000 are irrigated. The area is underlain predominantly by sedimentary rocks, mainly limestone and gypsum of the upper Tertiary. Climate is hot and arid, with mean precipitation of 490 mm and mean annual temperature of 22.4º C.
One of the reasons for carrying out this work was to recognize factors that have contributed to the genesis of soil formation in the area under study. The distribution and evaluation of salinity and/or sodicity of different soil units are characterized.
Natural vegetation has been greatly altered by man's influence and by overgrazing. Vegetation is characterized by mezquite (Prosopis glandulosa), (Boutelow trifida), and nopal (Opuntia leptocaulis, Cercidium texanum and Setairina). Crops are constituted by wheat, corn, sorghum, onion and cotton... In order to continue, download the full paper in PDF.
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