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Often associated with lowland heathlands, parklands or coastal cliffs, lowland acid grassland typically occurs on nutrient-poor, free-draining soils with a pH ranging from 4 to 5.5.ird species of conservation concern use acid grassland for breeding or wintering and include woodlark, stone-curlew, lapwing, chough, hen harrier and merlin. Adders and other reptiles bask on the bare ground, and small heath butterflies dance between flowers.
So important is the influence of the soil in determining which plants can grow that it is this characteristic that is used to describe the grassland. When grassland is called âneutralâ, âbase-richâ or âacidicâ, these terms are really describing the soil upon which the grassland has formed.Base-richâ soil is formed from rocks like limestone, serpentine and old red sandstone. Like them it is rich in calcium and other âbasesâ and supports plants which are âlime-lovingâ. This type of soil is uncommon in Scotland, and the base-rich grasslands it supports are of limited extent.