Soil pH in Cass, ND: Lime or Sulfur?

Typical topsoil pH in Cass, ND

Typical topsoil in Cass, ND is pH 7.3 and calcareous, so sulfur won't lower it for long. For vegetable garden, choose alkaline-tolerant varieties and add compost rather than fighting the soil.

What Cass needs, by plant

• Beds or pots instead: lawn (cool-season grass), vegetable garden, tomatoes, potatoes, strawberries, roses, blueberries, azaleas and rhododendrons, blue hydrangeas, pink hydrangeas.

What to do next

If your test confirms pH near 7.3, consider raised beds for anything acid-loving; with 37% of soils here carrying free lime, sulfur will not hold.

How mixed the soil is

Of the 1,106,171 surveyed acres in Cass, ND, 62% are near neutral (6.5-7.3), 37% are alkaline (above 7.3), 1% are moderately acidic (5.5-6.5). Mapped soils run from pH 6.1 to 8.2, a spread of 2.1 units across 1,227 soil components. 62% of the land falls in one class, so the county figure is a fair first guess for most yards here.

Clay, organic matter and rates

Topsoil here averages 31.3% clay and 4.78% organic matter, which this site treats as clay. Moving it one pH unit takes about 11.5 lb of lime or 3.4 lb of sulfur per 100 sq ft. 37% of mapped components carry free carbonate (lime already in the ground), enough that sulfur gets neutralised before it does much.

Cass against the rest of North Dakota

pH 7.3 is 0.1 above the North Dakota median of 7.2. 45 of 53 North Dakota counties have more acidic topsoil. Nationally it is more alkaline than the US county median of 6.05.

Closest in pH within the state: Towner (7.27), Benson (7.28), Richland (7.28), Mountrail (7.29), Foster (7.31), Eddy (7.32), Walsh (7.38), Traill (7.39).

The range in North Dakota runs from Grant at 6.85 to Pembina at 7.5; Cass sits 69% of the way up.