A-horizon


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Related to A-horizon: soil profile
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Noun1.A-horizon - the top layer of a soil profileA-horizon - the top layer of a soil profile; usually contains humus
A horizon
humus - partially decomposed organic matter; the organic component of soil
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Brexit, forever looming on the A-horizon, would make access to A-justice even more elusive.
Natural justice for the environment can be helped by specialist courts
SOC concentrations in A-horizon soils ranged from 0.04% to 5.03%, with a geometric mean of 1.18% and an arithmetic mean of 1.45%.
Storage and spatial patterns of organic carbon of soil profiles in Guangdong province, China
For example, in Tasman Bay (northern South Island) fieldwork, 5-12 cm thick alluvial gravel sediments are associated with A-Horizon Maori soils of the lower Waimea River catchment in and around Appleby, and at site N26/80 near Motueka River mouth (Figure 2; Barber 2010; Challis 1976).
Molluscan mulching at the margins: investigating the development of a South Island Maori variation on Polynesian hard mulch agronomy
For example, in the A-horizon, Cd loads heavily (0.778) on Factor 1 (i.e., Cd and Factor 1 are strongly associated), and lightly on Factors 2 (0.126) and 3 (0.198), and has a unique component of 0.339; the unique component usually contains error which is difficult to isolate.
Cadmium geochemistry of soils and willow in a metamorphic bedrock terrain and its possible relation to moose health, Seward Peninsula, Alaska
Cumulative runoff correlated with the coarse sand content in the A-horizon and organic carbon content in the top 30 mm of the soil (Table 6).
Nutrient losses under simulated rainfall from pasture plots in the great lakes district, New South Wales
Comparisons of A-horizon thickness, organic carbon content, and bulk density indicate that the A horizon depletion has greatly diminished from its earlier pace.
Status of the organic soils in the Scioto Marsh, Hardin County, Ohio (1)
One recognizes the relatively weakly developed BrownEarth horizon Be under the organic layer of moder Om and a sour A-horizon As.
Harmonic and disharmonic soil-type interference on Late Pleistocene and Holocene sediments in Northeast Germany/Hilispleistotseeni ja Holotseeni setetel kujunenud mullatuupide harmooniline ja disharmooniline seostatus Kirde-Saksamaal
By this time, the whole surface was covered with the forest floor beneath which the A-horizon had formed even in the absence of the ground vegetation (Table 1).
Rehabilited quarry detritus as parent material for current pedogenesis
tillage operations and water erosion, the whole A-horizon was displaced or washed out from the upper parts (summit, shoulder, backslope) of the hillslope and deposited in the lower parts (footslope, toeslope)--burying the original soil surface (Figure 5).
The effect of moldboard plow on tillage erosion along a hillslope
The average bulk density of all mixtures for both the Coonalpyn and Bordertown sites increased with increasing amounts of clay-rich subsoil aggregates mixed with the pure A-horizon sand (Table 2).
Size of subsoil clods affects soil-water availability in sand-clay mixtures
lack of structure in A-horizon, mottling, and charcoal flecking) but without rock mulching.
Soil nutrient analysis of Rapa Nui gardening
As a result of humus accumulation, the depth of the A-horizon (10YR3/1) is 8 cm; it is commonly rooted by fine and medium roots, and its boundary is gradually clear and smooth.
Current primary pedogenesis on Devonian sandstone in southern Estonia/Nuudisaegne primaarne mullateke Devoni liivakivil Louna-Eestis

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