Soil properties and salt content of soil from Inland salt meadow near Radnevo town

M. Todorova, N. Grozeva, D. Dermendgieva
Abstract. One of the most representative localities of Inland salt meadows in the country is the Inland salt meadow near the town of Radnevo, Bulgaria. A soil unit of that salt meadow has not been a subject of any detailed study. The objective of the present paper is to study the properties, degree and type of salt content of the soil from Inland soil meadow. The survey was conducted in 2011 – 2012. For the purpose of the study in July 2011 a soil profile was made with a depth of 100 cm on a relatively dry, not waterlogged and centrally located study territory. Samples from the soil profile were taken from different depth: 0-10 cm, 10–20 cm, 20–30 cm, 30–40 cm, 40–50 cm, 50–60 cm, 60–70 cm and 70–80 cm. A total of 60 soil samples were also taken from the study territory from a depth of 0–20 cm in same period. Soil samples were analysed for electrical conductivity, pH, Cl -, HCO- and SO2- content. The main reasons leading to swamping and 3 4 soil salinization are the accumulation relief with non-draining plane and micro depressions in it, the poor drainage of underground filtration water, high level of groundwater and high content of clay in the soil which results in low permeability. The soil unit is Gleic Vertisol, surface waterlogged, saline of sulphate–chloride type.