Saline irrigation

Some comments from below the video

#  Isn't it a problem that the salt level of the land increases to a level that the land becomes unusable? This has been a problem in south of Iran where the water from Karun river has some salt and after a few decades, most of the farm land has been damaged beyond repair.

#  Over a number of crop cycles, the salt concentrations will be reduced, by the crops that take up the salts. The carrots, for example.  The water is being deliberately and selectively salinated, to provide a scientific base, from which to make observations and recommendations.