Landscape Planning for “Kubratovo 1” Sand and Gravel Deposit Located on Alluvial Meadow Soil, Sofia Region, Bulgaria

The paper presents results of landscape planning and investigation on Fluvisols. The object is “Kubratovo 1” sand and gravel deposit, Bulgaria. Soil samples were taken from twenty- one soil profiles at a depth of 0-20 cm, 20-40 cm, 40-60 cm, 60-80 cm, and 80-100 cm. The changes in physicochemical properties were investigated at different soil depths and the relationships between different soil characteristics were tested. There are statistically significant positive or negative regressions. There are regression relationships between the soil texture fractions and bulk density, total porosity, soil organic matter, total Kjeldahl nitrogen, available phosphorus and available potassium.