Potential ammonia-sensitive forest — Old forest soil

Forests where there was also forest according to the Science Society map around the 1780s. In these areas there may have been forest for more than 200 years. Due to the potentially long forest continuity, these areas are included in the assessment of forest sensitivity.1780年左右，依据科学学会（Science Society）地图标注为原有林地的森林区域。此类区域的林地存续时长或已超过200年。鉴于其潜在的长期森林连续性，这些区域被纳入森林敏感性评估范畴。