Robuta

https://www.internationalbulletins.com/intjour/index.php/jah/article/view/2107

THE SIGNIFICANCE OF CONSTANT COVERING OF THE SOIL SURFACE. | Journal of Agriculture & Horticulture

soil surface significance constant covering journal

https://www.berlin.de/umweltatlas/en/soil/impervious-soil-coverage/2005/download/

Impervious Soil Coverage (Sealing of Soil Surface) 2005 - Berlin.de

impervious soil coverage sealing surface