Changes in agrophysical properties of fallow brown podzolic soils in the Primorsky Region. M.L. BURDUKOVSKII, P.A. PEREPELKINA, V.I. GOLOV

Abstract

Changes in agrophysical properties of fallow brown podzolic soils in the Primorsky Region. M.L. BURDUKOVSKII, P.A. PEREPELKINA, V.I. GOLOV (Federal Scientific Center of the East Asia Terrestrial Biodiversity, FEB RAS, Vladivostok).

Changes in aggregate structure and bulk density of brown podzolic soils during their postagrogenic evolution have been studied in the successions on abandoned agricultural fields 2-, 10-, 20- and 30-years old (Yakovlevsky and Anuchinsky Districts in the Primorsky Region of the Russian Far East). Soil macroaggregates were separated with the sieve (dry sieve) to seven aggregate size fractions, i.e.>10, 10–5, 5–2, 2–1, 1–0.5, 0.5–0.25 and <0.25 mm. The bulk density of the soil was determined by the gravimetric method. Mature fallows have a significantly better structure and characterized by an increase of agronomically valuable aggregates and a decrease in mean weight diameter and bulk density in comparison with their younger analogues. The most significant changes are noted in the 30-year-old fallow soils. Such studies have not been previously conducted in the Primorsky Region of the Russian Far East.