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Mostrando publicaciones 1-13 de 13
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A smart crop water stress index-based io T solution for precision irrigation of wine grape
Fuentes-Peñailillo, Fernando; Ortega-Farías, Samuel; Acevedo-Opazo, Cesar; Rivera, Marco; Araya-Alman, Miguel (2024)The Scholander-type pressure chamber to measure midday stem water potential (MSWP) has been widely used to schedule irrigation in commercial vineyards. However, the limited number of sites that can be evaluated using the ...
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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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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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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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Characterization of stomatal density and size of different vitis vinifera L. cultivars growing in mediterranean climate conditions
Espinoza, Sergio; Ortega-Farías, Samuel; Ahumada-Orellana, Luis (2024)The stomatal traits of 13 red and white grapevine cultivars of Vitis vinifera L. established in a cultivar collection garden in central Chile were characterized in this study. The cultivars examined were ‘Cabernet Franc’, ...
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Consumer preferences and willingness to pay for organic apples
García, Leidy; Cerda, Arcadio A.; Ortega-Farías, Samuel; Ubilla, Álvaro M. (2012)Este estudio provee información de comercialización, con respecto a las preferencias y disposición a pagar por manzanas orgánicas. Específicamente, los objetivos de este estudio fueron determinar la disposición a pagar ...
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Effect of irrigation cut-off strategies on yield, water productivity and gas exchange in a drip-irrigated hazelnut (Corylus avellana L. cv. Tonda di Giffoni) orchard under semiarid conditions
Ortega-Farías, Samuel; Villalobos-Soublett, Emilio; Riveros-Burgos, Camilo; Zúñiga, Mauricio; Ahumada-Orellana, Luis (2020)An experiment was conducted to evaluate the effect of irrigation cut-off (ICO) strategies on yield components, water productivity (WP), and gas exchange in drip-irrigated hazelnut (Corylus avellana L., cv. Tonda di Giffoni) ...
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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 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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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 ...
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Remote sensing model to evaluate the spatial variability of vineyard water requirements
Ortega-Farías, Samuel; Fonseca, D.; De la Fuente-Sáiz, Daniel; Kilic, Ayse; Ortega-Salazar, Samuel; Allen, Richard; Carrasco-Benavides, Marcos (2017)The main agricultural areas of Chile will face a significant reduction of rainfall (between 20-40%) due to the global climate change. Also, Chile is periodically affected by the climatic phenomenon of “La Niña” (ENSO), ...