Zobrazeno 1 - 10
of 119
pro vyhledávání: '"Miguel Quemada"'
Publikováno v:
Remote Sensing, Vol 14, Iss 3, p 565 (2022)
Drought is a significant challenge to semiarid Mediterranean grasslands, Increasing the accuracy of monitoring allows improving the conservation and management of these vital ecosystems. Meteorological drought is commonly monitored by the Standard Pr
Externí odkaz:
https://doaj.org/article/7f7bc37cf19247b1866065946eee77d3
Autor:
Irene García-González, Chiquinquirá Hontoria, José Luis Gabriel, María Alonso-Ayuso, Miguel Quemada
Publikováno v:
Data in Brief, Vol 18, Iss , Pp 1327-1333 (2018)
In this data article we provide different field parameters of an agricultural irrigated system under Mediterranean conditions. These parameters represent the response of variables related to soil functionality to different cover crops. Soil and plant
Externí odkaz:
https://doaj.org/article/698addb8b911493bbe30036a6f4eae1f
Autor:
Osvaldo Salazar, Renato Diaz, Adriana Nario, Ximena Videla, María Alonso-Ayuso, Miguel Quemada
Publikováno v:
Agriculture, Vol 11, Iss 8, p 721 (2021)
Nitrogen (N) in a maize crop is a determining yield factor, but its negative impact on the environment is also known. Therefore, it is necessary to propose mitigation strategies that allow an improvement in the N fertilizer efficiency (NFE), such as
Externí odkaz:
https://doaj.org/article/74caa4802d9b4fa6aac399ebdc5252ef
Autor:
María D. Raya-Sereno, J. Ivan Ortiz-Monasterio, María Alonso-Ayuso, Francelino A. Rodrigues, Arlet A. Rodríguez, Lorena González-Perez, Miguel Quemada
Publikováno v:
Remote Sensing, Vol 13, Iss 7, p 1373 (2021)
Remote sensing allows fast assessment of crop monitoring over large areas; however, questions regarding uncertainty in crop parameter prediction and application to nitrogen (N) fertilization remain open. The objective of this study was to optimize of
Externí odkaz:
https://doaj.org/article/ff82b83fa6c74181b2a0b82da13856df
Autor:
Andrés F. Almeida-Ñauñay, Rosa María Benito, Miguel Quemada, Juan Carlos Losada, Ana M. Tarquis
Publikováno v:
Entropy, Vol 23, Iss 5, p 559 (2021)
Multiple studies revealed that pasture grasslands are a time-varying complex ecological system. Climate variables regulate vegetation growing, being precipitation and temperature the most critical driver factors. This work aims to assess the response
Externí odkaz:
https://doaj.org/article/295d58a98ada4ef69f479bc5e123af0a
Autor:
Luis Lassaletta, Alberto Sanz-Cobena, Eduardo Aguilera, Miguel Quemada, Gilles Billen, Alberte Bondeau, Maria Luz Cayuela, Wolfgang Cramer, Joris P C Eekhout, Josette Garnier, Bruna Grizzetti, Diego S Intrigliolo, Margarita Ruiz Ramos, Estela Romero, Antonio Vallejo, Benjamín S Gimeno
Publikováno v:
Environmental Research Letters, Vol 16, Iss 7, p 073002 (2021)
Worldwide, Mediterranean cropping systems face the complex challenge of producing enough high-quality food while preserving the quantity and quality of scarce water for people and agriculture in the context of climate change. While good management of
Externí odkaz:
https://doaj.org/article/37c123fea44c4c9cb7483ad2a82e4eb4
Publikováno v:
Remote Sensing, Vol 6, Iss 4, Pp 2940-2962 (2014)
Estimating crop nitrogen (N) status with sensors can be useful to adjust fertilizer levels to crop requirements, reducing farmers’ costs and N losses to the environment. In this study, we evaluated the potential of hyperspectral indices obtained fr
Externí odkaz:
https://doaj.org/article/ff4cf99f41b64989a40173bad9f4efc4
Autor:
Philip E. Dennison, Yi Qi, Susan K. Meerdink, Raymond F. Kokaly, David R. Thompson, Craig S. T. Daughtry, Miguel Quemada, Dar A. Roberts, Paul D. Gader, Erin B. Wetherley, Izaya Numata, Keely L. Roth
Publikováno v:
Remote Sensing, Vol 11, Iss 18, p 2072 (2019)
Remotely sensed data can be used to model the fractional cover of green vegetation (GV), non-photosynthetic vegetation (NPV), and soil in natural and agricultural ecosystems. NPV and soil cover are difficult to estimate accurately since absorption by
Externí odkaz:
https://doaj.org/article/e6097264c01d497994fe58c53b82101a
Autor:
Jose Luis Gabriel, Miguel Quemada, María Alonso-Ayuso, Jon I. Lizaso, Diana Martín-Lammerding
Publikováno v:
Sensors, Vol 19, Iss 18, p 3881 (2019)
Nitrogen (N) losses from agricultural systems increase air and water pollution, and these losses are highly correlated with the excessive fertilization. An adjusted N fertilization is then a key factor in increasing the N fertilizer efficiency, and l
Externí odkaz:
https://doaj.org/article/5380c2392404409399c4c364acdf63dc
Autor:
W. Dean Hively, Jacob Shermeyer, Brian T. Lamb, Craig T. Daughtry, Miguel Quemada, Jason Keppler
Publikováno v:
Remote Sensing, Vol 11, Iss 16, p 1857 (2019)
A unique, multi-tiered approach was applied to map crop residue cover on the Eastern Shore of the Chesapeake Bay, United States. Field measurements of crop residue cover were used to calibrate residue mapping using shortwave infrared (SWIR) indices d
Externí odkaz:
https://doaj.org/article/e5dc2d3c194b4bf989a1c0aca7adb5a7