coarse fragment

[′kȯrs ′frag·mənt]

(geology)

A rock or mineral fragment in the soil with an equivalent diameter greater than 0.08 inch (2 millimeters).

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References in periodicals archive ?

The key uses field morphological properties (texture, pedality, colour, coarse fragment content) to map the spatially diverse materials that strongly affect plant growth and the success of mine pit rehabilitation (Tables 1 and 2).

Properties of regolith beneath lateritic bauxite in the Darling Range of south Western Australia

Coarse fragment content varied from 40 to 55 percent (by volume) and rooting depth extended up to 30 cm (12 in) (Lord, 1984).

Cattle grazing effects on plant species composition and soil compaction on rehabilitated forest landings in central interior British Columbia

Carbon stock for a layer of soil is the product of organic carbon content (C%), bulk density (BD, g/[cm.sup.3]), coarse fragment content (CF, %), and thickness (cm), representing the mass of carbon per area over a specified depth (t/ha of carbon) (Ellert et al.

Meeting bulk density sampling requirements efficiently to estimate soil carbon stocks

where ROKF is the coarse fragment factor as defined by Simanton et al.(1984), [C.sub.e] and [P.sub.e] are event values for the USLE C and P factors, and [X.sub.e] is selected from:

Event erosivity factor and errors in erosion predictions by some empirical models

Percentage weight of the coarse fragments was measured, and percentage of coarse fragment by volume was calculated as described by Delgado (1998).

Use of site-specific management zones to improve nitrogen management for precision agriculture

The shapes of the coarse fragments (d [greater than or equal to] 9.5 mm), medium fragments (4.75 [less than or equal to] d < 9.5 mm), fine fragments (0.075 mm [less than or equal to] d < 4.75 mm), and tiny fragments were plate, flake, sand, and power, respectively.

Experimental Study of Influence of Support Failures on Rockbursts under True-Triaxial Condition

Soil samples were analysed to determine particle-size distribution (hydrometer method), calcium-carbonate equivalent (HCI treatment or titrimetric method), organic matter content (Walkley-Black method), soil reaction (saturated paste), percentage of coarse fragments (by volume), and bulk density (by cylinder method) (Soil Survey Staff 1996).

Generalisation of continuous models to estimate soil characteristics into similar delineations of a detailed soil map

Fine spoil was a silty material from lagoon sedimentation resulting from the process of coal washing, without coarse fragments. Coarse spoil was the sieving remnant, containing 89% by weight coarse fragments (93% of these 2-6 cm), mainly limestone mixed with gypsum and lignite (this is the same spoil employed by the mine company to construct the banks).

Reclamation of steeply sloping coal spoil banks under Mediterranean semi-arid climate

Coarse fragments (diameter > 2 mm ) within the sample were screened out and weighed.

Soil quality of harvested and grazed forest cutblocks in southern british Columbia

The coarse fragments were measured and used to correct the bulk density.

Prediction of three key hydraulic properties in a soil survey of a small forested catchment

Some of these coarse-textured soils have a significant amount of coarse fragments, which usually increases with depth (USDA-SCS 1973; USDA-SCS 1988).