Visual soil evaluation: reproducibility and correlation with standard measurements
Titel:
Visual soil evaluation: reproducibility and correlation with standard measurements
Auteur:
van Leeuwen, Maricke M.W.J. Heuvelink, Gerard B.M. Wallinga, Jakob de Boer, Imke J.M. van Dam, Jos C. van Essen, Everhard A. Moolenaar, Simon W. Verhoeven, Frank P.M. Stoorvogel, Jetse J. Stoof, Cathelijne R.