Soil pH in Seward, NE: Lime or Sulfur?

Typical topsoil pH in Seward, NE

Typical topsoil in Seward, NE is pH 6.14, already right for vegetable garden (6-7). Test before adding anything.

What Seward needs, by plant

• Already in range: lawn (cool-season grass), vegetable garden, strawberries, roses, pink hydrangeas.
• Just outside, test first: tomatoes (off by 0.1), potatoes (off by 0.1), azaleas and rhododendrons (off by 0.1).
• Sulfur: blueberries 2.5 lb/100 sq ft over 2 applications; blue hydrangeas 2.1 lb/100 sq ft over 2 applications.

What to do next

If your test lands near 6.14, you can skip lime and sulfur for lawn (cool-season grass), vegetable garden, tomatoes, potatoes, strawberries, roses, azaleas and rhododendrons, pink hydrangeas.

How mixed the soil is

Of the 365,809 surveyed acres in Seward, NE, 78% are moderately acidic (5.5-6.5), 18% are near neutral (6.5-7.3), 5% are alkaline (above 7.3). Mapped soils run from pH 5.5 to 7.9, a spread of 2.4 units across 300 soil components. 78% 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 26.1% clay and 2.6% organic matter, which this site treats as loam. Moving it one pH unit takes about 7 lb of lime or 2.3 lb of sulfur per 100 sq ft. 6% of mapped components carry free carbonate (lime already in the ground).

Seward against the rest of Nebraska

pH 6.14 is 0.61 below the Nebraska median of 6.75. 10 of 93 Nebraska counties have more acidic topsoil. Nationally it is more alkaline than the US county median of 6.05.

Closest in pH within the state: Thayer (6.1), Cass (6.11), Gage (6.12), Nuckolls (6.14), Otoe (6.17), Pawnee (6.2), Adams (6.23), Saunders (6.23).

The range in Nebraska runs from Fillmore at 5.88 to Scotts Bluff at 7.58; Seward sits 15% of the way up.