Definitions for "Acidic soil"
When the soil's pH is below 7,0
Soil acidity affects a plant's ability to absorb nutrients. Acidic soil has a pH of less than 7.0 -- A soil with a pH of about 7.5 to 6.0 is mildly acidic; 6.0 to 5.0 soils are moderately acidic; and below that, soil is considered highly acidic. Plants growing in acidic soil are less able to absorb nitrogen, phosphorus, and potassium. Areas of heavy rainfall will often have acidic soils. In addition to adding organic material, soil can be made less acidic by liming.
Soils with a pH less than 7.