Eyhorn, Frank
Muller, Adrian
Reganold, John P.
Frison, Emile
Herren, Hans R.
Luttikholt, Louise
Mueller, Alexander
Sanders, Jürn
Scialabba, Nadia El-Hage
Seufert, Verena
Smith, Pete
Article History
First Online: 9 April 2019
Competing interests
: Frank Eyhorn serves as Vice-President of IFOAM — Organics International. The authors do not have any competing interests regarding the content of this article.