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204 results on '"Quemada, Miguel"'

10. Cover crops do increase soil organic carbon stocks—A critical comment on Chaplot and Smith (2023)

Author

Poeplau, Christopher, primary, Liang, Zhi, additional, Don, Axel, additional, Seitz, Daria, additional, De Notaris, Chiara, additional, Angers, Denis, additional, Barré, Pierre, additional, Beillouin, Damien, additional, Cardinael, Rémi, additional, Ceschia, Eric, additional, Chenu, Claire, additional, Constantin, Julie, additional, Demenois, Julien, additional, Mary, Bruno, additional, Pellerin, Sylvain, additional, Plaza‐Bonilla, Daniel, additional, Quemada, Miguel, additional, and Justes, Eric, additional

Published
2024
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12. Comparison of nitrogen fertilisation recommendations of West European Countries

Author

Jordan‐Meille, Lionel, primary, Denoroy, Pascal, additional, Dittert, Klaus, additional, Cugnon, Thibaut, additional, Quemada, Miguel, additional, Wall, David, additional, Bechini, Luca, additional, Marx, Simone, additional, Oenema, Oene, additional, Reijneveld, Arjan, additional, Liebisch, Frank, additional, Diedhiou, Khady, additional, Degan, Francesca, additional, and Higgins, Suzanne, additional

Published
2023
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20. Fertigation

Author

Villalobos, Francisco J., Quemada, Miguel, Delgado, Antonio, Villalobos, Francisco J., editor, and Fereres, Elias, editor

Published
2016
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21. Control of Salinity

Author

Villalobos, Francisco J., Mateos, Luciano, Quemada, Miguel, Delgado, Antonio, Fereres, Elias, Villalobos, Francisco J., editor, and Fereres, Elias, editor

Published
2016
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23. Fertilizers

Author

Delgado, Antonio, Quemada, Miguel, Villalobos, Francisco J., Villalobos, Francisco J., editor, and Fereres, Elias, editor

Published
2016
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29. Sustainable sources of irrigation water and nitrogen are critical for the adaptation of European crop production to climate change

Author

George, Timothy S., Martre, Pierre, Ruiz-Ramos, Margarita, Cooper, Julia, Rempelos, Leonidas, Rodriguez, Alfredo, Cohan, Jean-Pierre, Quemada, Miguel, and Cammarano, Davide

Subjects
SolACEPB
Abstract

Climate change will affect the yield potential of crops in different ways in different regions of Europe. In much of Europe there will be increased yield potential for crops. However, in southern and eastern regions there will be a strong decline in yield potential. To maximise yield potential and mitigate against yield declines both irrigating and maintaining nitrogen input is important. There are also some positive benefits of cultivar selection and rotation, but these are less significant. To mitigate against the impact of climate change the main policy recommendation is to identify and promote sustainable sources of both water and nitrogen for crop production for future cropping systems.

Published
2022
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38. Nitrogen dynamics in cropping systems under Mediterranean climate: a systemic analysis

Author

Lassaletta, Luis, primary, Sanz-Cobena, Alberto, additional, Aguilera, Eduardo, additional, Quemada, Miguel, additional, Billen, Gilles, additional, Bondeau, Alberte, additional, Cayuela, Maria Luz, additional, Cramer, Wolfgang, additional, Eekhout, Joris P C, additional, Garnier, Josette, additional, Grizzetti, Bruna, additional, Intrigliolo, Diego S, additional, Ruiz Ramos, Margarita, additional, Romero, Estela, additional, Vallejo, Antonio, additional, and Gimeno, Benjamín S, additional

Published
2021
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42. Laboratory versus field calibration of capacitance probes

Author

Gabriel, Jose Luis, Lizaso, Jon I., and Quemada, Miguel

Subjects
Soils -- Electric properties, Capacitance meters -- Usage, Soil moisture -- Research, Earth sciences
Abstract

Capacitance probes (CP) based on responses to electromagnetic properties in soil are widdy used for monitoring soil volumetric water content ([[theta].sub.v]), but proper calibration is necessary to obtain reliable results. The objectives of this study were to: (i) compare errors in evaluating [[theta].sub.v] when using soil-specific equations as opposed to the manufacturer's default equation; (ii) compare the CP calibration equations obtained in the laboratory and in the field; and (iii) evaluate the accuracy of CP under field conditions using soil-specific equations as opposed to the manufacturer's default equation. Laboratory and field calibrations were conducted by fitting statistical relationships between readings from CP and [[theta].sub.v] measured from soil cores. The accuracies of the obtained calibration equations were evaluated under field conditions during two irrigation cycles. In both calibration studies, the manufacturer's default equation consistently overcalculated [[theta].sub.v] (RMSE > 0.044 [m.sup.3] [m.sup.-3]), whereas custom CP calibration equations provided accurate [[theta].sub.v] determinations (RMSE < 0.028 [m.sup.3] [m.sup.-3]). Even when [[theta].sub.v] was overestimated, the manufacturer's default equation was able to reproduce [[theta].sub.v] dynamics during irrigation. Therefore, if users are interested in relative differences in [[theta].sub.v], they may use the manufacturer's default equation. If absolute values are needed, however, soil-specific calibration is required. The accuracy of CP in monitoring [[theta].sub.v] under field conditions was slightly better using the laboratory calibration equation (RMSE = 0.019 [m.sup.3] [m.sup.-3]) rather than the field calibration equation (RMSE = 0.023 [m.sup.3] [m.sup.-3]). The use of a laboratory calibration is recommended given that it is easily reproducible, facilitates work planning, and minimizes uncertainties. Abbreviations: CP. capacitance probes; PVC, polyvinyl chloride. doi:10.2136/ssaj2009.0157

Published
2010

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