title: Determig the reference value of Cesium-137 specific activity on arable slopes in the periglacial area of the Upper Oka basin: application of satellite images, GIS and soil agrochemical indicators
abstract: The paper deals with the issues of determining the reference value of specific activity of cesium-137 of Chernobyl origin when applying the radiocesium method to assess the loss of gray forest soil in the areas of spread of the microrelief of paleocryogenic origin in the periglacial region of the upper Oka basin. Paleocryogenic microrelief is recognized in spring satellite imagery available on Google EarthTM. The necessity of choosing a reference plot for a specific field that differs in microre
journal: InterCarto InterGIS