Long-term trajectories of the C footprint of N fertilization in Mediterranean agriculture (Spain, 1860–2018)

The authors are grateful to the Spanish Ministry of Economy and Competitiveness (AgroSceNA-UP, PID2019-107972RB-I00), the Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria of Spain (MACSUR02-APCIN2016-0005-00-00) and the Comunidad de Madrid, Spain (AGRISOST-CM S2018/BAA-4330). E Aguilera is supported by a Juan de la Cierva research contract from the Spanish Ministry of Economy and Competitiveness (IJC2019-040699-I and FJCI-2017-34077). L Lassaletta is supported by Spanish Ministry of Economy and Competitiveness (MINECO) and European Commission ERDF Ramon y Cajal Grant (RYC-2016-20269), Programa Propio from UPM, and acknowledges the Comunidad de Madrid (Spain) and structural funds 2014-2020 (ERDF and ESF). A Sanz-Cobena gratefully acknowledges the Autonomous Community of Madrid and UPM for their economic support through the research project APOYOJOVENESNFW8ZQ-42-XE8B5K. All authors are grateful to this project for covering the publication fees. The authors are very grateful to the Spanish Ministry of Agriculture for gathering and providing detailed information with respect to crop production and management. The authors gratefully acknowledge the two anonymous reviewers for their constructive and useful suggestions.