Salt Water and Crops

#1
I'm assuming it's bad - as it is to drink - so what methods are there to get the salt out, and perhaps use on crops? Who has tried such a method? How did it work out?
 
#2
There are some filters that can remove salt from salt water. Have you ever seen most people are farming using ground water and that would be more salty. Here in some of the areas where we get salty water from the ground.
 
#3
I heard in Facebook that a farm owner has cultivated so many vegetable plants using salt water. I am not sure how he done, but he might be a techie to grow plants with salt water.

Here most of the borewell water is salty and this is more problematic for drip irigation lines.