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  • noun

Synonyms for A-horizon

the top layer of a soil profile


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References in periodicals archive ?
In the study area, the geometric mean concentration of SOC in A-horizon soils was 1.
As the leaching and mineralisation intensity weakened along this gradient, the mean SOC content and mean SOC density of A-horizon soils increased; from Latosols to Latosolic Red soils to Ted soils, SOC content increased from 0.
There is consistent evidence within the south-western M24/11 A-Horizon that beach shell sediment was redeposited and spread extensively over many square metres.
However, a stepwise regression with more variables (such as slope, A-horizon clay content, or bulk density) also indicated cover as the only significant predictor.
Overall, however, the loss of A-horizon thickness is greatest from 1934 to 1968, averaging close to 10 in (25 cm) during that time period.
In the topsoil moder changes into raw humus (Orm) and in the sour A-horizon As eluviation begins by podzolization: AsEp (not so clearly visible in the photo).
The plant humus of both ground litter and of the recently formed A-horizon are similar.
The average thickness of the A-horizon was equal to 17.
Physical and chemical properties of bulk samples of the A-horizon sand and the B-horizon clay-rich subsoil from Coonalpyn and Bordertown, South Australia Values in parentheses represent standard deviation Soil horizon Dry bulk density % Clay % Sand (kg [m.
55 cm, respectively), the solum proved accumulative at the expense of silt in the A-horizon and silt and clay in the Bw-horizon altogether by 14% of initial sandstone (Table 5).
5 cm %C, pH, and P retention, and A-horizon total C, total N, exchangeable Ca, and A-horizon thickness were plotted.
As mentioned in 1980, in the second of the series of what are now the ISCO Conferences, improving conditions for organic activity in soils is likely to have benefits in terms of accelerated formation of the A-horizon, better crop growth and less runoff and erosion, with increased likelihood of soils' productivity being sustainable well into the future.
A-horizon throughflow is the dominant pathway for P and DOC in texture-contrast soils with: (1) a sandy loam A horizon 40-65 cm deep, (2) an A-horizon hydraulic conductivity [is greater than] 2.