Buffering refers to the capacity of a material to withstand changes in either pH or salinity, often as a consequence of water quality.
With the same rate of lime the net change in pH is lower in Irish peat compared to other peat. Irish peat is more buffered against pH change, which can lead to nutrient deficiencies/toxicities in growing media. In a practical sense this means that Irish peat is superior to younger peats for protecting the plant from the effects of poor quality water.
Buffering action of Irish peat illustrated by pH change in response to lime.
Irish R2=0.9841 Swedish R2=0.9771 Baltic R2=0.9814