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Mostrando publicaciones 1-20 de 25
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A soil water indicator for a dynamic model of crop and soil water interaction
Water scarcity is a critical issue in agriculture, and the development of reliable methods for determining soil water content is crucial for effective water management. This study proposes a novel, theoretical, non-physiological ...
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Adoption of irrigation scheduling: Role of extension and training in central Chile
Jara-Rojas, Roberto; Engler, Alejandra; Adasme-Berríos, Cristian; Carrasco-Benavides, Marcos ; Ortega-Farías, Samuel; Mediavilla, Winston (2018)This article applies a Logit regression model to examine the factors that contribute to the adoption of irrigation scheduling by smallscale farmers in Central Chile. Socio-economic and productive information was collected ...
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An analysis of seed colour during ripening of cabernet sauvignon grapes
This case study examines seed colour during ripening using an exhaustive colorimetric analysis. The aim was to associate the chemical ripening with the seed colour in order to estimate the ripening stages of Cabernet ...
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Assessment of an automated digital method to estimate leaf area index (LAI) in cherry trees
Carrasco-Benavides, Marcos ; Mora, Marco ; Maldonado, Gonzalo; Olguín-Cáceres, Jeissy; von Bennewitz, Eduardo ; Ortega-Farías, Samuel; Fuentes, Sigfredo (2016)study was carried out during two growing seasons to evaluate the performance of a digital photography method to estimate the leaf area index (LAID) of cherry tree cultivars. The trial comprised 10 ‘Bing’ and 10 ‘Sweetheart’ ...
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Assessment of atmospheric emissivity models for clear-sky conditions with reanalysis data
Morales-Salinas, Luis; Ortega-Farias, Samuel; Riveros-Burgos, Camilo; Chávez, José L.; Wang, Sufen; Tian, Fei; Carrasco-Benavides, Marcos ; Neira-Román, José; López-Olivari, Rafael; Fuentes‑Jaque, Guillermo (2023)Atmospheric longwave downward radiation (Ld) is one of the significant components of net radiation (Rn), and it drives several essential ecosystem processes. Ld can be estimated with simple empirical methods using atmospheric ...
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Automated computation of leaf area index from fruit trees using improved image processing algorithms applied to canopy cover digital photograpies
Mora, Marco ; Avila, Felipe; Carrasco-Benavides, Marcos ; Maldonado, Gonzalo; Olguín-Cáceres, Jeissy; Fuentes, Sigfredo (2016)Leaf area index (LAI) is a critical parameter in plant physiology for models related to growth, photosynthetic activity and evapotranspiration. It is also important for farm management purposes, since it can be used to ...
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Calibration and validation of an aerodynamic method to estimate the spatial variability of sensible and latent heat fluxes over a drip-irrigated Merlot vineyard
Carrasco-Benavides, Marcos ; Ortega-Farías, Samuel; Morales-Salinas, Luis; Poblete-Echeverría, Carlos ; Chavéz, José L. (2017)A study was carried out to calibrate and validate the aerodynamic temperature method for estimating the spatial variability of the sensible (H) and latent (LE) heat fluxes over a drip-irrigated merlot vineyard located in ...
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Canopy architecture assessment of cherry trees by cover photography based on variable light extinction coefficient modelled using artificial neural networks
Leaf area index (LAI) is one of the most important parameters in physiological and functional plant models to estimate tree canopy vigor and photosynthesis. However, LAI requires either destructive or indirect methods for ...
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Comparison of the absolute and relative difference spectral indices to estimate burn severity: the case of endangered nothofagus alessandrii (ruil)
Gajardo, John; Espinoza-Meza, Sergio; Yáñez, Marco; Carrasco-Benavides, Marcos ; Ormazábal, Yony; Mena, Carlos; Gómez, Persy; Garrido, Pedro (2022)Accurate information is needed about burn severity caused by fires to design strategies for ecosystem recovery. The Mediterranean zone of Chile holds a high level of plant endemism. In summer 2017, nearly half a million ...
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Effects of decreasing levels of n amendments on organic “granny smith” apple trees
The effect of decreasing levels of organic N-fertilization on fruit production, mineral composition and fruit quality was evaluated in organically cultivated “Granny Smith” apples trees. Treatments included the application ...
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Effects of different irrigation levels on plant water status, yield, fruit quality, and water productivity in a drip-irrigated blueberry orchard under Mediterranean conditions
Ortega-Farías, Samuel; Espinoza-Meza, Sergio; López-Olivari, Rafael; Araya-Alman, Miguel; Carrasco-Benavides, Marcos (2021)As blueberries are susceptible to water stress and their future cultivation in semiarid Mediterranean areas will be challenged by drought, irrigation management strategies will be needed to optimize water productivity and ...
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Effects of four irrigation regimes on yield, fruit quality, plant water status, and water productivity in a furrow-irrigated red raspberry orchard
Ortega-Farias, Samuel; Espinoza-Meza, Sergio; Lopez-Olivari, Rafael; Araya-Alman, Miguel; Carrasco-Benavides, Marcos (2022)Due to drought intensification in Mediterranean-type climates, raspberry growers need to implement irrigation scheduling to save water without decreases in yield and fruit quality. A study was performed to evaluate ...
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Effects of regulated post-harvest irrigation strategies on yield, fruit quality and water productivity in a drip-irrigated cherry orchard
Carrasco-Benavides, Marcos ; Espinoza-Meza, Sergio; Olguín-Cáceres, Jeissy; Muñoz-Concha, Diego; von Bennewitz, Eduardo ; Ávila Sánchez, Carlos; Ortega-Farías, Samuel (2020)We evaluated the effects of different post-harvest irrigation strategies on yield, fruit quality and quantity, and water productivity (WP) of sweet cherry trees, over a two-growing season experiment. The fruits were evaluated ...
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Estimation of water requirements for a drip-irrigated apple orchard using Landsat 7 satellite images
Carrasco-Benavides, Marcos ; Ortega-Farías, Samuel; Ortega-Salazar, Samuel; De la Fuente-Sáiz, Daniel; Allen, Richard; Kilic, Ayse (2017)A study was carried out to evaluate the METRIC (Mapping EvapoTranspiration at high Resolution with Internalized Calibration) model to estimate water requirements or actual evapotranspiration (ETa) for a drip-irrigated apple ...
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Improved albedo estimates implemented in the METRIC model for modeling energy balance fluxes and evapotranspiration over agricultural and natural areas in the Brazilian Cerrado
Silva Oliveira, Bruno; Caria Moraes, Elisabete; Carrasco-Benavides, Marcos ; Bertani, Gabriel; Verola Mataveli, Guilherme Augusto (2018)In this study we assessed METRIC (Mapping Evapotranspiration at high Resolution with Internalized Calibration) model performance to estimate energy balance fluxes and evapotranspiration (ET) in two heterogeneous landscapes ...
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Increasing the shelf life of post-harvest table grapes (Vitis vinífera cv. Thompson Seedless) using different packaging material with copper nanoparticles to change the atmosphere
Loyola-López, Nelson; Carrasco-Benavides, Marcos ; Duarte Duarte, Pablo H.; Arriola-Herrera, Mariela (2017)An effective way to control post-harvest rotting of table grapes is the use of sulfur dioxide (SO2 ). However, under certain conditions, the use of SO2 can cause significant loss, mainly associated with bleaching of the ...
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Influence of provenance origin on the early performance of two sclerophyllous Mediterranean species established in burned drylands
Espinoza-Meza, Sergio; Yañez, Marco A.; Martínez, Eduardo; Carrasco-Benavides, Marcos ; Vaswani, Suraj A.; Gajardo, John; Magni, Carlos R. (2021)Forest restoration have had limited success due to intense and prolonged droughts in Mediterranean-type ecosystems. In this context, knowledge of growth and physiology in seedlings of different provenances can be useful ...
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Mathematical modeling of fruit trees' growth under scarce watering
As a consequence of the Global Warming, the decrease in water resources is a problem that affects the agricultural systems worldwide. In particular, the Global Warming has produced a sustained decrease in precipitation in ...
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Monthly calibration of Hargreaves–Samani equation using remote sensing and topoclimatology in central-southern Chile
Carrasco-Benavides, Marcos ; Morales-Salinas, Luis; Ortega-Farías, Samuel; Riveros-Burgos, Camilo; Neira-Román, José; López-Olivari, Rafael (2017)Reference evapotranspiration (ETo) has a key role in irrigation scheduling. In this sense, the Hargreaves–Samani equation (HS) is a reliable and widely used method to estimate ETo. The HS equation just requires temperature ...
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Parameterization of the satellite-based model (METRIC) for the estimation of instantaneous surface energy balance components over a drip-irrigated vineyard
Carrasco-Benavides, Marcos ; Ortega-Farías, Samuel; Lagos, Luis Octavio; Kleissl, Jan; Morales-Salinas, Luis; Kilic, Ayse (2014)A study was carried out to parameterize the METRIC (Mapping EvapoTranspiration at high Resolution with Internalized Calibration) model for estimating instantaneous values of albedo (shortwave albedo) (αi), net radiation ...