subsoil

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subsoil

the soil below the plough layer, which is relatively infertile.

Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

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References in periodicals archive ?

Typically in these soils, the sandy A horizon with <5% clay experiences severe water repellence at the soil surface, plus low fertility, and the clay-rich subsoil experiences poor soil structure.

Size of subsoil clods affects soil-water availability in sand-clay mixtures

* Development and demonstration of practical methods that growers can use to identify, avoid, and manage hostile subsoils;

Combating Subsoil Constraints: R&D for the Australian grains industry

Consequently, the characteristics of subsoil could be different from those of the surface layer.

Mobility of Cd, Pb, Cu, and Cr in some Estonian soil types/ Cd, Pb, Cu ja Cr mobiilsus monedes Eesti muldades

The Eden soil also has slightly lower clay content than the lower subsoils of Switzerland or the fine-silty pedons.

Prospects for enhanced groundwater recharge via infiltration of urban storm water runoff: a case study

Surface residue management by no-tillage practices was complicated by the general need to subsoil for effective crop production (Campbell et al., 1974; Box and Langdale, 1984).

Crop yield and nitrogen accumulation response to tillage of a coastal plain soil

Geological Survey (USGS) in Denver, Colo., found that desert subsoils in parts of the Southwest contain large reservoirs of nitrates that had been previously unrecognized in desert nitrogen budgets.

Nitrates abundant in arid Southwest

Similar to the observation that the trend in C stock in the topsoils was not observed in the subsoils, Young et al.

Carbon stock in the solum of some coarse-textured soils under secondary forest, grassland fallow, and bare footpath in the derived savanna of south-eastern Nigeria

Bakker AC, Emerson WW, Oades JM (1973) The comparative effects of exchangeable calcium, magnesium and sodium on some physical properties of red brown earths subsoils. 1.

Diagnosis, extent, impacts, and management of subsoil constraints in the northern grains cropping region of Australia

Subsoils at the Victorian sites were light to heavy clay and became more alkaline with depth, whereas the South Australian sites had clay loam subsoils and neutral pH trends.

Impact of subsoil physicochemical constraints on crops grown in the Wimmera and Mallee is reduced during dry seasonal conditions

Experiments on texture-contrast soils have tested the addition of amendments to subsoils to increase plant root penetration and extraction of stored water, thereby making crops less susceptible to the fluctuating moisture conditions in the surface horizons (Wang et al.

Effects of subsoil amendments on soil physical properties, crop response, and soil water quality in a dry year

Accumulation or retention of sodium as an exchangeable cation has led to sodicity over large areas of the landscape and subsoils are massive or are characterised by large prismatic and columnar structural units, offering only limited opportunities for root growth.

High clay contents, dense soils, and spatial variability are the principal subsoil constraints to cropping the higher rainfall land in south-eastern Australia

Crop yield on the sandy soils of the Western Australian wheatbelt is influenced strongly by the plant-available water (PAW) and strength of subsoils. High soil strength may limit root growth and access to potentially available moisture.

Relationships between fabric, water retention, and strength of hard subsoils in the south of Western Australia