Modern Concepts & Developments in Agronomy How Much Humus Does the Arable Land Need? Martin Körschens* Förderverband e. V., Lauchagrund 1, Goethestadt Bad Lauchstädt, Germany *Corresponding author:Martin Körschens, Submission: March 24, 2023;Published: April 12, 2023 DOI: 10.31031/MCDA.2023.12.000796 ISSN 2637-7659Volume12 Issue 5