QMA’s Recommendations for Correcting Acidic Soil pH

How do you correct acidic soil?

Start with a soil test and the intended crop. A low pH can limit nutrient availability and, in some soils, increase the availability of manganese or aluminum to harmful levels. The appropriate correction depends on the soil and the plants you want to grow.

QMA reviews whether lime is the appropriate amendment for the intended crop, then identifies the appropriate amendments and calculated amounts for the actual growing area.

Select the amendment using the whole soil test

Calcitic agricultural lime supplies calcium and raises pH. Dolomitic lime also supplies magnesium, so it is appropriate only when that additional magnesium fits the soil’s needs. Wood ash can raise pH and add potassium, but its variable composition and overlapping nutrient contributions require careful review.

The lime amount depends on soil buffering, texture, organic matter, treatment depth, and the material’s calcium carbonate equivalent (CCE). Starting pH alone does not establish an exact dose. A buffer-pH or laboratory lime-requirement result can strengthen the estimate; where that evidence is unavailable, QMA identifies the uncertainty and uses a staged correction when appropriate.

Use a staged correction when the evidence calls for it

Strongly acidic soil may need an initial application followed by reassessment before adding more. The plan gives explicit application amounts and instructions. Retesting is not a routine QMA requirement; where staged correction warrants it, the plan explains when to retest at a comparable depth using comparable methods.

Compost is part of the picture when its composition is known

Compost may improve structure and organic matter, but its nutrient and liming effects vary by source. QMA does not assume that compost replaces a calculated lime requirement. If a customer provides a compost test and target organic matter percentage, QMA will review combined contributions and adjust the plan at no charge.

Match soil pH to the crop

Raising every soil to pH 6.5 is not appropriate for every crop. Blueberries and other acid-loving plants need different conditions. For a blueberry bed, QMA evaluates how to create suitable conditions, including elemental sulfur when supported by the soil evidence, with staged application and retesting where needed.

What your QMA plan provides

Your five-page Soil Amendment Plan explains what the soil test tells us, the appropriate amendments and calculated amounts, how to apply them, and the calculations and evidence behind the recommendations.