Valley Of Mexico Research Articles

The Chinampa a Response to Climate Change: A Complex Model of Ancestral Wisdom for Urban Resilience

Introduction: In the context of climate change, cities face critical challenges in water management and sustainability. One of the most ingenious and adaptive procedures that has endured throughout history is that of chinampas, which is a model of sustainable agriculture, and reflects a way of life intimately connected with nature. Objective: Evaluate the possibility of incorporating the method based on the chinampas built by the Mexica culture in current cities to generate a complex model of urban resilience. Theoretical Framework: In the theoretical framework there are theories such as ecological utopia, dystopia, stationary urbanism addressed by Fernando Gaja, smart cities by Tim Campbell and sustainability from the perspective of Francisco Javier Aceves, in addition to the agroecology of Nicholls and the socioecological systems of Towers as main axes of analysis. Method: The methodology is based on complex systems from the approach of Edgar Morin and Rolando García, with stratification, and the application of different methods to form a complex unit that is a resilient city model with the use of chinampas. Results and Discussion: The excessive construction, pollution, traffic and various problems show an urban crisis that was drying up the basin of the Valley of Mexico and there are currently few areas where bodies of water and chinampas such as Xochimilco are still conserved with socio-ecological systems and agroecology. Research Implications: Urban resilience, which aims to recover from an impact caused by climate change to current cities, health, adequate habitability conditions, and natural resources, which is why searching for a resilient urban city model is a complex task. Originality/Value: It is based on the recovery of ancestral knowledge to reestablish healthy cities of the 21st century from sustainability and bioclimatics since chinampas are used by the Mexica culture in pre-Hispanic times.

The Maya Ajawtaak and Teotihuacan Hegemony c. 150–600 ce

This study considers the role played by Teotihuacan in the emergence of the office of the Classic Maya ajawtaak, or ‘lords’. I argue that the synthesis of this office at the site of Tikal was influenced by the building of Teotihuacan's Pyramid of the Feathered Serpent between about 180 and 230 ce. Prior to and in concert with this building's construction, Teotihuacanos orchestrated the sacrifice of an estimated 200 or more individuals, some number of whom resided beyond the Basin of Mexico before burial. Osteological traits consistent with origins in the Maya region are present among these sacrifices. The Pyramid of the Feathered Serpent features mirror and obsidian icons, which later grew to prominence in the self-presentations of the ajawtaak. I note that around the time of this monument's construction, Tikal's obsidian corpus changed in ways that paralleled similar, earlier changes that had occurred to obsidian procurement strategies at Teotihuacan. I conclude that from about 200 ce, some Classic ajawtaak observed the religion that cohered with the building of Teotihuacan's Temple of the Feathered Serpent. The ajawtaak occupied a unique positionality in Early Classic Mesoamerica that was neither essentially Teotihuacan nor essentially Maya, but a dynamic syncretism of the two ethnicities.

Long-lived topography of the Oaxacan Complex (southern Mexico) after the assembly of Pangea: Evidence from apatite fission-track dating

Understanding the exhumation history of ancient orogens is crucial for unraveling the tectonic and climatic forces that shape Earth's landscapes. Relict topography from ancient orogenic belts can persist on the surface for tens of millions of years, providing detritus to surrounding areas even without significant uplift events. This study examines the exhumation history of the Oaxacan Complex in southern Mexico, a Proterozoic peri-Gondwanan continental block located at the periphery of western equatorial Pangea during the l ate Paleozoic. This complex supplied detritus to extensional basins in southern Mexico throughout the Mesozoic and Cenozoic. We reinterpret existing apatite fission track (AFT) data from in situ samples of the Oaxacan Complex and add a set of detrital AFT data from modern sediments of the Peñoles River, which drains the northern Oaxacan Complex. The detrital AFT age distribution is continuous, ranging from ∼180 Ma to ∼50 Ma, without a predominant component age and showing a positive age-elevation correlation, suggesting a slow cooling history of the basement exposed in the drained area. QTQt thermal history modeling of the detrital AFT ages corroborates this slow cooling. Moreover, reinterpretation of in-situ AFT data from the literature confirms that the cooling history of the crustal block exposed in the northern Oaxacan Complex is characterized by a prolonged residence time in the Partial Annealing Zone of the apatite fission-track thermochronometer, spanning at least from the Triassic to the Paleogene. These results suggest that the Oaxacan Complex did not undergo any significant exhumation events after the Late Paleozoic assembly of Pangea, neither during the Triassic–Early Cretaceous rifting associated with Pangea breakup nor during development of the Late Cretaceous–Eocene Mexican Orogen. According to this scenario, we suggest that the post-collision relict topography of the Oaxacan Complex was likely sustained by isostatic rebound and lithological resistance, supplying sediment for tens of millions of years to the Mesozoic and Cenozoic basins of southern Mexico.

Carbon isotopic record of a platform-to-basin transect through the Permian Reef Complex (Guadalupian) in the Delaware Basin of Texas and New Mexico

The Guadalupian Permian Reef Complex of the Delaware Basin is one of the most studied carbonate reef systems of the Paleozoic. Despite extensive work on the carbonate sedimentology, sequence stratigraphy, and diagenetic history of the Delaware Basin, a high-resolution carbonate carbon isotope record along a platform to basin transect for the Capitanian (264.3–259.5 Ma, the youngest age of the Guadalupian Epoch) does not yet exist. The carbon isotopic record of the Delaware Basin is important because 1) it allows us to test hypotheses about controls on the carbon isotope proxy, 2) it provides constraints on how well modern carbonate platforms like the Great Bahama Banks serve as analogues for ancient carbonate settings, and 3) these types of restricted basins likely played an important role in Permian carbon cycling and the Capitanian extinctions.In this study we present 493 new Capitanian carbonate carbon isotopic values paired with a detailed sedimentological and sequence stratigraphic framework from the platform, slope, toe of slope, and deep basin of the Delaware Basin. The bulk of the new δ13C values fall within the range of previously reported unaltered carbonates from the basin, suggesting that these results record primary environmental processes and were not significantly altered by diagenetic overprinting. With this dataset, we test hypotheses about sources of carbon isotopic variability in shallow carbonate platforms. Our results indicate that in the Delaware Basin there are no systematic and resolvable depth or lateral gradients in carbon isotopic values, that δ13C values do not vary as a function of grain type, and that there is no resolvable relationship between carbon isotopic composition and sea level change. However, we do document statistically significant differences in δ13C distributions among facies associations which we attribute to the isotopic evolution of an upwelling water mass due to direct precipitation of mud along the slope. Our results support the idea that increasing carbon isotopic values through the Capitanian were driven by increased organic carbon burial in restricted basins.

Life history of Mexican species of the genus <i>Tlaloc</i> (Cyprinodontiformes, Profundulidae)

Fish of the genus Tlaloc are distributed from southern Mexico to Central America and are a distinctive example of the endemic fauna of the Mesoamerican highlands, which has been scarcely studied in Mexico. The present study provides basic life-history data for the species Tlaloc hildebrandi, T. candalarius, and T. labialis, which are native to the headwaters of the Grijalva-Usumacinta basin in southeastern Mexico. We collected 918 specimens to determine their Length-Weight Relationship (LWR), Relative Condition Factor (Kr), sex ratio, Gonadosomatic Index (GSI), fecundity, and size at first sexual maturity. Both sexes of all species had positive allometric growth, except for T. candalarius females (isometric). Mean Kr and sex ratio values differed significantly among species. Females’ GSI values differed significantly among species but were highest during the dry season in all three species. Absolute fecundity was positively correlated with standard length and weight. Sexual maturity was reached at different lengths among species. Based on these results, we suggest that all three species present an opportunistic life strategy, which is very common in fish of the order Cyprinodontiformes. These results represent a first contribution on the life-history of this group of fish and provide basic information that is fundamental to ensuring their conservation.

Gravity and magnetic study of the Xitle volcanic field, Basin of Mexico – Inferences on the pre-eruptive topography

Results of a gravity and magnetic study over a lava field in the southern Basin of Mexico are used to investigate on lava emplacement and pre-eruptive topography. The characteristics of lava flows depend on multiple factors, including the lava composition, effusion rate, rheology, fluid content and underlying terrain. The ∼2000 years old volcanic field, formed by seven flow units emplaced by the Xitle eruption, covers an extensive area >80 km2 characterized by topographic relief on the Ajusco volcano flank and surrounding plain. The study is conducted on the northern end of the volcanic field. The gravity and magnetic study is based on regional-residual separation, vertical and horizontal derivatives, reduced to the pole, analytical signal, spectral analysis and forward modeling. The regional gravity field shows two anomaly lows in the central sector, with the residual field showing trends of gravity highs. The residual magnetic anomaly is characterized by trends of magnetic highs associated to the lava field. Depths estimated from spectral analysis of gravity and magnetic anomalies show shallow sources at ∼22 m and ∼46 m, and deep sources at ∼469 m and ∼268 m, respectively. The underground sequence is modeled as a volcanoclastic succession of varying thickness. The first vertical derivatives, gradients and analytical signal enhance the anomalies associated to lava thickness variations. Joint gravity and magnetic analysis constraints the deep/shallow anomaly sources in the volcanic field and relations to pre-eruptive structure.

Array analysis of P-wave polarization data for constraining near-surface shear wave speeds: Aplication to theValley of Mexico seismic network

SUMMARY We present an array method for constraining near-surface shear wave speed values from P-wave polarization data. As the direction of P-wave particle motion is determined both by the incident ray parameter and the local surficial shear wave speed, the latter can be inferred from three-component seismic records if the ray parameter is estimated first. Previous studies have analysed data recorded at a single station from various earthquakes in order to estimate near-surface shear wave speed. In contrast, this paper analyses data recorded at an array of stations. As such, this method can estimate both ray parameter data for the recorded earthquakes and near-surface shear wave speed values at the studied sites. And as an advantage, the method can analyse records of local and regional earthquakes where ray parameter information cannot be reliably estimated using 1D reference velocity models. Additionally, by processing polarization data spanning multiple events and stations, our method provides robust estimates for near-surface shear wave speed values. We apply this array-based method to a seismic array covering the Valley of Mexico. Analysed records correspond to regional earthquakes with epicentral distances of roughly 300 km. The corresponding ray parameter values for all earthquakes were estimated from the delay of the seismic waves arrival throughout the network as all stations have a reliable time reference. Near-surface shear wave speed values estimated from the array-based polarization analysis are correlated with major geological features of the area such as the Trans-Mexican Volcanic Belt and the local basin. We also apply the presented method to a minimal data scenario. The flexibility of this method allows it to employ a single ray parameter value as input, producing robust estimates for near-surface shear wave speed values within our case study. This feature becomes useful in a variety of scenarios, such as utilizing seismic data lacking timing information. The presented method constitutes an accessible and inexpensive alternative to study shallow seismic structure, opening opportunities to expand and complement current tools and techniques to assess seismic hazards.

Assessment of the water quality in the coastal Yaqui valley (Mexico): implications for human health and ecological risks.

This study examines the water quality in the Yaqui Valley in Mexico, a semi-arid region impacted by mining, agriculture, and aquaculture. Contamination sources, health risks and ecological impacts are investigated. Freshwater was found to be contaminated by dissolved As, presumed to result from mining activities in the mountains. Drainage water revealed an overall contamination by dissolved As and by suspended particles enriched with Al, Fe and Mn, associated with runoff processes. Intermittent contamination of drainage water by Cu, K+, NO3- and PO43- is attributed to the use of fertilizers or pesticides. In the coastal area, drainage water contains high concentrations of Na, Ca, SO42- and Cl, related to salinization processes, as well as higher concentrations of dissolved As, related to solid/liquid interactions that are enhanced by salinization. This drainage water discharges into the bay, degrading the seawater quality and increasing ecological risks. Outputs of this study can serve as a reference for the protection of this economically important coastal ecosystem. Concerning health risks, this study demonstrates that groundwater is also contaminated by dissolved As, believed to be associated with transfers from the geological basement to the dissolved phase of water, and other major chemicals related to salinization processes. The findings indicate that ingesting the groundwater poses a significant risk to human health with a primary exposure risk associated with dissolved As, particularly among children. This study presents crucial data for the Yaqui population, water managers and researchers, and provides novel insights into the management and mitigation of the identified risks.

Techno-economic-environmental study of CO2 and aqueous formate solution injection for geologic carbon storage and enhanced oil recovery

As carbon capture, utilization, and storage (CCUS), carbon-dioxide enhanced oil recovery (CO2 EOR) has inherent shortcomings, such as inefficient oil recovery and carbon storage, and low storage security with mobile CO2. This paper presents a techno-economic-environmental analysis of using formate species, a product of CO2 electrochemical reduction, as an alternative carbon carrier for sequestration and EOR in a carbonate oil reservoir in the Gulf of Mexico Basin. CO2 injection, water-alternating-CO2 injection, and aqueous formate solution injection were compared using a compositional reservoir simulation model and an economic calculator. Formate solution injection yielded greater levels of oil recovery and net carbon storage, where the carbon-bearing species resided in the dense aqueous phase without having to rely on petrophysical trapping mechanisms (structural and capillary). The enhanced oil production, net carbon storage, and storage security can be promoted by providing formate-based CCUS with more incentives (e.g., greater tax credit) in comparison to CO2-based CCUS for EOR and the manufacture of chemicals and products. In establishing carbon storage incentive policies and regulations, policymakers should include alternative carbon carriers.

Holocene landscape transformation of lake basins of Central Mexico based on volcanic soil development: a first exploratory study from micromorphology to magnetic mineralogy

Holocene landscape transformation of lake basins of Central Mexico based on volcanic soil development: a first exploratory study from micromorphology to magnetic mineralogy

Space-based observations of tropospheric ethane map emissions from fossil fuel extraction

Ethane is the most abundant non-methane hydrocarbon in the troposphere, where it impacts ozone and reactive nitrogen and is a key tracer used for partitioning emitted methane between anthropogenic and natural sources. However, quantification has been challenged by sparse observations. Here, we present a satellite-based measurement of tropospheric ethane and demonstrate its utility for fossil-fuel source quantification. An ethane spectral signal is detectable from space in Cross-track Infrared Sounder (CrIS) radiances, revealing ethane signatures associated with fires and fossil fuel production. We use machine-learning to convert these signals to ethane abundances and validate the results against surface observations (R2 = 0.66, mean CrIS/surface ratio: 0.65). The CrIS data show that the Permian Basin in Texas and New Mexico exhibits the largest persistent ethane enhancements on the planet, with regional emissions underestimated by seven-fold. Correcting this underestimate reveals Permian ethane emissions that represent at least 4-7% of the global fossil-fuel ethane source.

Trace elements and heavy metal(loid)s triggering ecological risks in a heavily polluted river-reservoir system of central Mexico: Probabilistic approaches

The contamination of trace elements and heavy metal(loid)s in water bodies has emerged as a global environmental concern due to their high toxicity at low concentrations to both biota and humans. This study aimed to evaluate the ecological risk associated with the occurrence and spatial distribution of Mn, Fe, Co, Cd, Ni, Zn, Sb, As, Tl, Cu, Pb, U, and V in the heavily polluted waters of an important river-reservoir system (Atoyac River Basin) in central Mexico, using two-level tired probabilistic approaches: Risk Quotient based on Species Sensitivity Distribution (RQSSD) and Joint Probability Curves (JPCs). The concentrations of these elements varied widely, ranging from 0.055 μg L−1 to 9200 μg L−1 and from 0.056 μg L−1 to 660 μg L−1, in both total and dissolved fractions, respectively. Although geogenic and anthropogenic sources contribute to the presence of these elements in waters, the discharge of untreated or poorly treated industrial wastewater is the main source of contamination. In this regard, the RQSSD results indicated high ecological risk for Mn, Fe, Co, Ni, Zn, and Sb, and medium or low ecological risk for As, Tl, U, and V at almost all sampling sites. The highest RQSSD values were found downstream of a large industrial corridor for Co, Zn, Tl, Pb, and V, with Tl, Pb, and V escalating to higher risk levels, highlighting the negative impact of industrial contamination on biota. The JPC results for these elements are consistent with the RQSSD approach, indicating an ecological risk to species from Mn, Fe, Co, Ni, Zn, and Sb in waters of the Atoyac River Basin. Therefore, the results of this study offer a thorough assessment of pollution risk, providing valuable insights for legislators on managing and mitigating exposure.

Wastewater and agriculture in Mezquital valley (Mexico): analyzing alternatives from circular economy and ecological economy using bibliometric review

Given the water crisis worldwide, using wastewater in agriculture is an alternative because it employs around 70% of the planet’s freshwater despite the fact the implications of its use without prior treatment are diverse. The Mezquital Valley in Mexico is the second largest region in the World to use this type of water, and various disciplines have studied it for decades. Still, it has not been systematized to analyze the evolution of the impacts of its use in the region, nor has it been analyzed from a theoretical perspective. This work aim is analyzing the contributions of the Circular Economy and the Ecological Economy in order to provide an explanation of the problem and possible alternatives for using this vital resource. The theoretical analysis is supported by a schematic review of scientific articles published from 1990 to 2022 in the Scopus database, using bibliometric analysis.

Spatiotemporal distribution of sediment waves in the northern Gulf of Mexico Basin, USA

The northern Gulf of Mexico basin, known for its hydrocarbon potential and a myriad of geologic structures and processes, has been underexplored to understand deepwater sediment waves. The recent release of a vast amount of both 2D and 3D seismic data by the Bureau of Ocean Energy Management (BOEM) calls for a basin-wide identification of the sediment waves in the Gulf of Mexico.Integrating seismic, well-log, and high-resolution bathymetric data, this study identified sediment-wave fields on the seafloor as well as in the stratigraphic record. These sediment waves have an average wavelength of 798 m and an average wave height of 18 m. On the present-day seafloor, sediment waves are only located on the northwestern continental slope and eastward of the Bryant Fan area (south of Green Knoll). However, in the stratigraphic record, these bedform structures were found to be prevalent across the northwestern continental slope, northeastern continental slope, and continental rise. All of these sediment waves migrate upslope with crests that are perpendicular to the direction of basin-slope (i.e., parallel to the bathymetric contours). Thus, they are interpreted as cyclic-steps bedforms produced by supercritical sediment gravity flow processes. Investigations of these sediment waves have implications for petroleum geology, geohazard studies, oceanography, hydrodynamics, paleoclimate, and coastal engineering.

Impact of comorbidities on COVID-19 mortality in hospitalized women: Insights from the metropolitan area of the Valley of Mexico from 2020 to 2022

ObjectivesThis research summarizes the impact of the major comorbidities impacting hospitalized women with COVID-19 and their relation to death. MethodsPublic data from national databases (2020-2022) for hospitalized women, including identification data, hospitalization time, comorbidities, and intensive care unit (ICU) admissions, were analyzed. Women were stratified by age (split at 50 years). Binary regression models determined the correlation between comorbidities and COVID-19 with mortality, expressed as odds ratios. ResultsA total of 46,492 women were hospitalized, with 70.1% aged above 50 years. A total of 17,728 fatalities occurred, with 86.5% in the older age group. A total of 5.82% women required intensive care. The common comorbidities were pneumonia, hypertension, diabetes, obesity, and intubation. A total of 56.6% died within the 1st week; in the ICU, 65.7% died by week 2. In the logistic regression, diabetes and chronic kidney disease (CKD) were initially significant, followed by pneumonia and CKD (days 8-14), intubation and, ICU stay (beyond the 15th day). In the ICU, intubation impact worsened over time. ConclusionsOur study highlights the significant impact of comorbidities on COVID-19 mortality in women in the Valley of Mexico. Pneumonia, diabetes, CKD, and intubation were notably prevalent and correlated strongly with death in older women. Timely intubation improves survival, whereas delayed intubation increases mortality risk, particularly, in the ICU. Urgent targeted interventions are required, especially for older hospitalized women.

Geologic characteristics, exploration and production progress of shale oil and gas in the United States: An overview

We present a systematic summary of the geological characteristics, exploration and development history and current state of shale oil and gas in the United States. The hydrocarbon-rich shales in the major shale basins of the United States are mainly developed in six geological periods: Middle Ordovician, Middle–Late Devonian, Early Carboniferous (Middle–Late Mississippi), Early Permian, Late Jurassic, and Late Cretaceous (Cenomanian–Turonian). Depositional environments for these shales include intra-cratonic basins, foreland basins, and passive continental margins. Paleozoic hydrocarbon-rich shales are mainly developed in six basins, including the Appalachian Basin (Utica and Marcellus shales), Anadarko Basin (Woodford Shale), Williston Basin (Bakken Shale), Arkoma Basin (Fayetteville Shale), Fort Worth Basin (Barnett Shale), and the Wolfcamp and Leonardian Spraberry/Bone Springs shale plays of the Permian Basin. The Mesozoic hydrocarbon-rich shales are mainly developed on the margins of the Gulf of Mexico Basin (Haynesville and Eagle Ford) or in various Rocky Mountain basins (Niobrara Formation, mainly in the Denver and Powder River basins). The detailed analysis of shale plays reveals that the shales are different in facies and mineral components, and “shale reservoirs” are often not shale at all. The United States is abundant in shale oil and gas, with the in-place resources exceeding 0.246×1012 t and 290×1012 m3, respectively. Before the emergence of horizontal well hydraulic fracturing technology to kick off the “shale revolution”, the United States had experienced two decades of exploration and production practices, as well as theory and technology development. In 2007–2023, shale oil and gas production in the United States increased from approximately 11.2×104 tons of oil equivalent per day (toe/d) to over 300.0×104 toe/d. In 2017, the shale oil and gas production exceeded the conventional oil and gas production in the country. In 2023, the contribution from shale plays to the total U.S. oil and gas production remained above 60%. The development of shale oil and gas has largely been driven by improvements in drilling and completion technologies, with much of the recent effort focused on “cube development” or “co-development”. Other efforts to improve productivity and efficiency include refracturing, enhanced oil recovery, and drilling of “U-shaped” wells. Given the significant resources base and continued technological improvements, shale oil and gas production will continue to contribute significant volumes to total U.S. hydrocarbon production.

New records on the distribution of the Mexclapique, Girardinichthys viviparus (Bustamante, 1837) (Cyprinodontiformes, Goodeidae), an endangered species in Mexico

The “Mexclapique” Girardinichthys viviparus, is a goodeid endemic to the Valley of Mexico basin. This species is endangered following habitat alterations due to urbanization and pollution in central Mexico over the last 70 years, which has contributed to its population decline. From collections in the aquatic systems of Tlaxcala, 160 juveniles and adults of G. viviparus were captured (17.9–53.4 standard length) in six sites located in the upper basins of the Moctezuma and Atoyac rivers and extended its distribution to the east of the state of Tlaxcala in the Tecolutla River basin. Its presence in these sites may be the result of the processes of expansion, adaptation and establishment that the species has had in central Mexico, as well as the intercommunication through artificial channels in some of these lakes. These new records of G. viviparus are vital as they provide information about the prevailing populations in habitats in a region that has experimented with anthropogenic activities conjointly with the loss of aquatic systems. Besides, the lack of aquatic biodiversity preservation projects in Tlaxcala does not guarantee its long-term conservation.

Application of a water quality index (WQI) in the Ayuquila-Armería river basin in Mexico

Application of a water quality index (WQI) in the Ayuquila-Armería river basin in Mexico

Directional HVSR at the Chalco lakebed zone of the Valley of Mexico: Analysis and interpretation

This study delves into Horizontal-to-Vertical Spectral Ratio (HVSR) and directional HVSR (D-HVSR) using continuous 30-min ambient seismic noise (ASN) signals recorded at 68 sites in the Chalco lakebed zone of the Valley of Mexico (VM). Our aim is to explore the shallow stratigraphy and subsurface structures in that zone. The isoperiod map using the HVSR, and the ensuing velocity structure inversion reveals a basin of irregular shape and shallow depth in the surroundings. Additionally, we explore azimuthal effects by computing the D-HVSR by rotating the records to obtain the time series for a given direction. We found different polarizations at the measurement points, and focused on the frequencies in which the effect is more pronounced. The cases with significant polarizations at the dominant frequencies suggest an irregularity at the basement level. This is supported by preliminary synthetic results that uses the three-dimensional (3D) Indirect Boundary Element Method (IBEM) to assess the effects of interface irregularities like a channel or dike. In the present stage of development, the D-HVSR is a powerful tool to reveal the existence of lateral variations. The complexity of the lakebed zone response in the VM and its irregular characteristics show the potential of the D-HVSR approach as well as the need to deeply explore into the modeling for its better understanding and interpretation.

Explorando la eficiencia técnica de la producción agrícola en tres regiones de México

This work assesses the technical efficiency (TE) in agricultural production under irrigation of corn, alfalfa, sorghum, and plantain; the analysis is conducted for three hydrological subregions of Mexico: Río San Juan (north), Valley of Mexico (center) and Valle Bajo de Grijalva (South). The measurement was carried out by agricultural cycle (spring-summer, autumn-winter and perennial), and by land size. We use stochastic frontier analysis to corroborate whether the farmer's skills favor efficiency, with a production function that relates irrigated land as a basic element, and a set of explanatory socioeconomic variables. Despite limitations in the data, the results contribute to the knowledge of TE in Mexican agriculture. Indirectly, the contribution of irrigation is recognized, so identifying their economic relevance could help define strategies to improve agricultural production and support water management in agriculture.