**Acknowledgements**

Research funded by project INIA‐RTA2009‐00122‐C03‐03 of the Spanish Ministry Economy and Competitiveness. The authors would also like to acknowledge the support provided by Junta de Extremadura and FEDER funds. Special thanks to the farmers, practitioners and experts that contributed to this research. The first author also acknowledges the pre‐doctoral financial support of the Fundación Fernando Valhondo Calaff
