Classification of soils of Negoreloye forestry station

Abstract

Classification of soils is to be done by codes, which indicate the productivity (bonitet), the reference (prospective) tree species, soil evaluation in points and the index shows class of forests (1st – forest of insufficient moisture, 2nd – of excessive moisture). In a forest station there have identified 16 types of soils by codes: from IIIP561to IIIAl142. Soil IP771(60,7 %) is prevailing. Soils IIP681 and IаP891 occupy a much smaller area (13%). In the second class of forests, which account for 12% of the most frequently occurring soils IP772(6.4%) and IIP682(2.7%). The average score of forest stands is 45 and that of soils is 75 points. With an average stand density of 0.72 the stands evaluation is below the maximum by 55 points (100 – 45), due to the group of forests it is lower by 2 (100 – 98), due to site conditions by 23 (98 – 75), due to stand density by 21 (75 – 54) and due to species composition by 9 points. Forest productivity may be increased by 30 points by controlling the species composition and stand density.