The Intensive Monitoring of Forest Ecosystems (ICP-Forests Level II network) consists currently in 14 monitoring plots representing important Spanish Forest Ecosystems distributed throughout the Spanish mainland showing the most common forest situations of each country and representing rare or endemic situations.

The plot 30 Ps represents an Scots pine (Pinus sylvestris) forest located in Soria province. It is an 81 to 100 years old monoespecific regular forest, with a coverage of 85%. Climatic gradient is Supramediterranean. The topography is flat. The soil is made up of sandstones and conglomerates. it is chemically very poor and with limited thickness.