Managing Salty Soils

How do I know if my soil is salty?

Signs include white crust on the surface, scorched leaf edges, poor germination and plants that wilt while the soil is moist. Patches often show first in low spots or where water evaporates quickly.

Symptoms overlap with other problems, so confirm with a soil test that measures salinity, usually reported as electrical conductivity. Ask the lab whether sodium is measured too.

Take samples from healthy and damaged areas separately, so you can compare the two. Note where white crust or poor growth appears and whether it follows slopes, low spots or irrigation lines. Patterns often point to the source and direction of the problem.

Where does the salt come from?

Sources include irrigation water that carries dissolved salts, a shallow or rising water table, heavy use of some fertilizers or manure, road deicing near the land and naturally salty parent soil. In dry climates, evaporation leaves salts behind at the surface.

Test your irrigation water as well as your soil, since it may be the main source.

Water quality changes over time. A well can become saltier after heavy pumping or drought, and a pond can concentrate salts as it evaporates. Retest water periodically, and ask your extension office what level is acceptable for your crops.

What is the difference between saline and sodic soil?

Saline soils have a high total salt level. Sodic soils have high sodium relative to other ions, which damages structure and causes crusting and slow drainage. Some soils are both. The fixes differ, which is why the lab details matter.

Ask your extension office to read the report with you and name which type you have.

Salt tolerance varies widely among plants. Some vegetables and fruit are quite sensitive, and some grasses and forages tolerate much more. Your extension office can give a list of crops by tolerance, which helps you choose while the soil is recovering.

• Saline problems are about salt concentration.
• Sodic problems are about soil structure and drainage.
• Treatment depends on which one you have.

How do I reduce salt in the root zone?

The central approach is moving salts below the roots with good-quality water, which needs soil that drains. If drainage is poor, flushing can fail or cause problems elsewhere. Fixing drainage often comes first and may need a professional.

Mulch reduces evaporation and surface salt buildup. Choose salt-tolerant crops while the soil recovers.

Irrigation method makes a difference. Drip systems place water at the root zone and reduce salt buildup compared with overhead spraying that wets foliage. Occasional deeper watering moves salts down, when the soil drains well and the water itself is of good quality.

What should I avoid?

Avoid adding more manure, fertilizer or amendments than the soil test supports, since many contain salts. Do not assume gypsum helps, because it only addresses sodium problems. Avoid shallow, frequent watering that leaves salts near the surface.

Dumping runoff or flush water onto neighbors or into streams can carry legal trouble, so ask your state or local water agency what is allowed.

How long does recovery take?

It can take seasons, and some sites need a drainage fix or a change of water source first. Retest annually to track progress and keep records of water quality, amendments and crop results.

Your NRCS office or extension agent can advise on drainage options and local programs.

Document everything. Photos, test results and notes on drainage and watering give you and your advisers something to work from. Salt problems rarely resolve in one season, and records show whether you are moving in the right direction.

When should I call in professional help?

Call your extension office or NRCS office when salt damage covers a large area, spreads year by year or appears with standing water and a high water table. Drainage work can involve engineering, permits and neighbors, and it should not be improvised.

Also seek advice if your irrigation water tests high in salts, since you may need a different source or a different crop plan. Professionals can read your tests and tell you whether recovery is realistic.

Neighbors and downstream users matter as well. Water that drains from a salty field can carry salts into ditches, ponds and shared irrigation. Talk with your conservation district about how to handle drainage responsibly, and ask which local rules apply before you move any water off your land.

Last reviewed: November 12, 2026. Written by the Homestead & Small Farm Editorial Team. See our editorial policy.