Fe forms were selectively extracted from the air-dried fine earth
fraction (ADFE, particle diameter <2mm).
Mobile Si contents varied between 0.3 and 28[micro]g [g.sup.-1] fine earth
, whereas contents of adsorbed Si ranged from 1.2 to 39 [micro]g [g.sup.-1].
Soils are divided into two categories: fine earth
and coarse fraction.
The major minerals observed in the fine earth
fractions are shown in Table 6.
Air-dried soil samples were separated into fine earth
and coarse fragment fractions on a 2-mm screen, and ca.
Lead shot corrosion products were observed to develop rapidly into crusts surrounding individual Pb pellets, with concurrent increases in Pb in the soil solution and in the soil fine earth
To ensure a steady flow of water, "open" the well by removing the fine earth
or sand particles around the drive pump.
Bulk samples collected from the profile were sieved into five size fractions (<2, 2-4, 4 8, 8 16, and >16mm) to separate rock clasts and Fe nodules of different sizes from the fine earth
Total dry ([[rho].sub.t]) and fine earth
(<2 mm) ([[rho].sub.f]) bulk densities were determined.
The aim of our study was to reveal the effects of impervious surfaces in urban areas on SOC, microbial activity, and functional diversity of the fine earth
(<2 mm soil as separated by sieving) under different land-use types.
First, fine earth
dry bulk density (DBD) and available water content (AW) for the soil profiles were calculated using pedotransfer functions (PTFs) from qualitative soil descriptors (e.g.