The most important thing about organics is the health of the soil. Salts are a possible problem, but in sandy agricultural fields, that use only synthetic ferts, they are able to keep on improving the plant health and harvest.
Irrigating the desert, has demonstrated problems with salt buildup, but salts also wash away or time. I thought they floated in the water, but they also dissolve and end up in the ground water, along with the nitrites.
So as one increases organic matter and reduce the salt input, it is difficult to believe that most soils will be affected that much.
Now that I know that clay's texture(platelets) has nothing to do with water infiltration, percolation, or drainage,,, I wonder what does...