Burdukovskii M.L., Perepelkina P.A., Golov V.I.
Vestnik of the Far East Branch of the Russian academy of sciences 2020; (1): 60-65
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.
