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• Zimmermann, A. and Britz, W., 2016. European farms’ participation in agri-environmental measures. Land Use Policy, 50, pp.214-228.

• Pers Comm refs (May and June 2020): Dr Anne Boghal, Senior Soil Scientist, ADAS; Jim Egan, Kings, Technical Adviser; Dr Alastair Leake, Director of Policy & Allerton Project; Andrew Wells, Agricultural Consultant, Arable Alliance Ltd; John Williams, Principal Soil Scientist, ADAS
• Internet addresses:https://lbst.dk/landbrug/efterafgroeder-og-jordbearbejdning/efterafgroeder/