Effects

Salinization of rivers pollutes downstream fresh water and renders it unfit for fresh-water uses [domestic and agriculture].

Salinization may pollute lakes and their closed [endorheic] basins.

Salinization eventually renders unfeasible or impractical the agricultural enterprise.

Solution

Collect agricultural wastewaters.

Treat agricultural wastewaters properly [a difficult and expensive undertaking].

Dispose of agricultural wastewaters in the ocean [some people oppose even this].

Farm close to the ocean to cut down cost of transport.

Make end users [people] pay for the increased cost of growing crops in a sustainable fashion.

Research how to effectively desalinize agricultural wastewaters.