Keywords: monitoring land use Substances: 1-Naphthylacetic acid (PRPINYUDVPFIRX-UHFFFAOYSA-N) AMDOPH (IRTZMJWVZQYURE-UHFFFAOYSA-N) 2-Amino-4-methoxy-6-methyl-1-3-5 triazine (NXFQWRWXEYTOTK-UHFFFAOYSA-N)