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The growth course properties of grey alder (Alnus incana (L.) Moench) on different site types are still insufficiently researched, especially, if to compare the forest and abandoned agricultural lands. Due to the species relatively high prevalence in private forest areas in Latvia, which according to the forestry statistics data, equaled 11% in 2023, it has crucial significance to the economy. The paper analyses 40-year-old grey alder stands on abandoned agricultural land, forest land, and forests along the rivers...

The forests of south-western part of Zemgale Plain in Latvia are characterized by Scots pine (Pinus sylvestris L.) stands on fertile, nutrient rich soils. The existing information about these sites suggests of the calcium carbonate rich loamy sand soils formed by moraine. The Scots pine stands in area of Tervete National Park reach age of 260 years. The oldest and biggest trees reach considerable dimensions – up to 70 cm in diameter and height of 47 m, thus exceeding the country's average indices. These are the ol...