It is customary to maintain a leaching fraction to avoid salinity. In the Tevatronic system increasing irrigation depth is equivalent to a leaching fraction.
An alternate approach is to irrigate precisely and apply periodically an extra volume of water for leaching, when needed. Precise irrigation reduces salt and fertilizer input and periodical leaching can be as efficient as continuous leaching while wasting less water. Pepper was successfully irrigated with 2.8-3.5 dSm water