sea salt farm at samut sakhon, thailand. organic sea salt. evaporation and crystallization of sea water. raw material of salt

abstract agriculture asia background beautiful brine chloride crystal crystallization evaporation farm field flake food heap industrial industry iodine land landscape material mine mineral nacl natural nature ocean organic original pile pool process production raw refined row sakhon salt salty samut science scrub sea sodium solar source spa summer system thailand traditional travel treatment water white