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  • Blackwell Publishing Ltd  (5,981)
  • 2020-2024
  • 1985-1989  (5,981)
  • 1987  (5,981)
  • 1
    Electronic Resource
    Electronic Resource
    Field drainage, soil water management and flood hazard (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Soil use and management 3 (1987), S. 0 
    Details
    ISSN: 1475-2743
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract. The efficient management of clay soils depends on the rapid disposal of water following rainfall. Winter storm outfall hydrographs of under drained catchments ranging in size from 0.44 ha to 7.2 km2 are given, illustrating the drainage response of a Windsor Series soil. The response time of different sized catchments is discussed in relation to potential flood hazard arising from drainage improvements of agricultural land. Comparison is made with other soils to reveal broadly similar patterns of drainflow, with peak flow occurring typically between 1 and 4 hours after the mid-point of a storm. Despite large fluxes of water through the soil profile, the water content of the soil within the catchment of an individual tile lateral is shown to vary only by small amounts both during and after a single rainstorm and over a drainage season.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1475-2743.1987.tb00722.x
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  • 2
    Electronic Resource
    Electronic Resource
    Soil salinization as an effect of grazing in a native grassland soil in the Flooding Pampa of Argentina (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Soil use and management 3 (1987), S. 0 
    Details
    ISSN: 1475-2743
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract. The salt regimes in soil under grazed and ungrazed natural grassland were compared on a Natraquoll in the Flooding Pampa of Argentina. The salt concentration in the topsoil of the grazed land increased sharply and episodically after flooding, whereas in the ungrazed land it did not.When the area was flooded groundwater rose and increased the salt content of the deep horizons. Thereafter the topsoil became salinized during drought when the atmospheric water demand was large. The evaporation from the soil surface in the grazed area was faster than in the enclosed field, being probably the cause of the accumulation of salts in the topsoil.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1475-2743.1987.tb00724.x
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  • 3
    Electronic Resource
    Electronic Resource
    Temporal and spatial patterns of nitrate losses from an agricultural catchment (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Soil use and management 3 (1987), S. 0 
    Details
    ISSN: 1475-2743
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract. Nitrate losses from a small catchment of mixed land use in south Devon, England, are described. The temporal pattern of leaching is dominated by major losses through the winter months when both streamflow and nitrate concentration are large. Storm runoff is generated mainly by subsurface stormflow, and nitrate losses are particularly important at such times. The spatial pattern of nitrate loss from the catchment is controlled both by land use and by topography.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1475-2743.1987.tb00723.x
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  • 4
    Electronic Resource
    Electronic Resource
    FOREWORD (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Soil use and management 3 (1987), S. 0 
    Details
    ISSN: 1475-2743
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1475-2743.1987.tb00716.x
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  • 5
    Electronic Resource
    Electronic Resource
    Nitrogen inputs and outputs in a small agricultural catchment in the eastern part of the United Kingdom (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Soil use and management 3 (1987), S. 0 
    Details
    ISSN: 1475-2743
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract. Nitrate concentrations measured in an ephemeral stream draining a 170 ha clay catchment in eastern England, with about 23% arable land, were greater than 11.3 mg N 1–1 on the resumption of flow each autumn but then declined. There was also a spring peak in two years out of seven, 1978–1984, which depend on the length of time soils was at field capacity in the preceding winter. Mean annual load measured in rain was 19 kg N ha-1 and loss of nitrate in the stream 34 kg N ha-1. A catchment nitrogen balance suggested that inputs, which averaged 130 kg N ha yr-1, were generally more than outputs, average 108 kg N ha yr-1', but gaseous losses were not taken into account.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1475-2743.1987.tb00725.x
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  • 6
    Electronic Resource
    Electronic Resource
    Land evaluation of basaltic terrain under semi-arid to mediterranean conditions in the Golan Heights (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Soil use and management 3 (1987), S. 0 
    Details
    ISSN: 1475-2743
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract. Soils derived from basalt bordering the northern Jordan Valley have developed under semi-arid to humid Mediterranean conditions and belong to two major soil orders: Vertisols in the drier south and Alfisols (Brown and Red Mediterranean soils) in the more humid north. Major limitations on land use of the vertisols are low hydraulic conductivity, slow infiltration and strong susceptibility to erosion by water. Crops growing on basalt-derived soil also suffer from phosphorus deficiency, though the soils contain much inorganic phosphorus. The natural vegetation is mainly herbaceous and grows well even under intensive and continuous grazing. The land is best used for pasture wherever limitations restrict other uses.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1475-2743.1987.tb00726.x
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  • 7
    Electronic Resource
    Electronic Resource
    Measurement, interpretation and modelling of soil compaction (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Soil use and management 3 (1987), S. 0 
    Details
    ISSN: 1475-2743
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract. The analysis of some experimental field results is used to illustrate the problem of measuring and evaluating compaction treatment effects below wheel ruts of different depths. A solution to the problem is described which traces vertical soil movement to allow comparisons between treatments to be made using soil elements which derive from the same depth in the undisturbed profile, irrespective of their depths in the compacted profile.A soil compaction model, which predicts the changes in dry bulk density resulting from the passage of wheels, is briefly described. Examples are given of its use in comparing the compaction caused by various types and arrangements of wheels and in assessing the contribution made by a particular input variable.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1475-2743.1987.tb00717.x
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  • 8
    Electronic Resource
    Electronic Resource
    A critical state soil mechanics model for agricultural soils (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Soil use and management 3 (1987), S. 0 
    Details
    ISSN: 1475-2743
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract. The paper presents the experimentally derived state boundary surfaces of critical state theory for a sand, a loam and a clay soil. Orderly changes to these surfaces with moisture content and two soil micro-structural states have been identified. These findings are used as the basis for the formulation of a fairly simple universal model of the geometry of critical state space for unsaturated soils. Examples are given of how this model can be used to explain known soil behaviour in many practical situations. The indications are that this model can provide the theoretical framework for a fundamental comprehension of the many complex processes involved in soil loosening and compaction. There is, as yet, no simple experimental technique for measuring the critical state boundaries of field soils and this is a major impedement to the development of the model as a practical soil management tool.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1475-2743.1987.tb00718.x
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  • 9
    Electronic Resource
    Electronic Resource
    Soil failure and force prediction for soil engaging discs (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Soil use and management 3 (1987), S. 0 
    Details
    ISSN: 1475-2743
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract. The soil forces acting upon agricultural discs arise from both a passive reaction on the concave face and scrubbing reaction on the convex face. The magnitude of these reactions is a function of both the disc geometry, primarily the radius of the sphere from which the disc is formed, and the angle of the disc to the direction of travel. These forces can be predicted within acceptable limits using soil mechanics theories based upon Mohr-Coulomb properties. From both the theoretical and practical results optimum disc setting can be selected to give low specific resistance values. The prediction model has been successfully used with stress analysis techniques to design new disc geometries and, with the advent of improved materials, to select appropriate disc thicknesses.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1475-2743.1987.tb00719.x
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  • 10
    Electronic Resource
    Electronic Resource
    Crop and soil response to subsoil loosening, deep incorporation of phosphorus and potassium fertilizer and subsequent soil management on a range of soil types.: Part 1: Response of arable crops (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Soil use and management 3 (1987), S. 0 
    Details
    ISSN: 1475-2743
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract. Between 1978 and 1985 16 experiments tested crop response to subsoil loosening by either the Wye Double Digger or a winged subsoiler. Additionally, response to incorporation of 350 kg ha of P2O5and K2O into the subsoil was tested. Soil types were mainly well-drained light-and medium-textured soils in arable rotations. Subsoil loosening increased the yield of spring-sown crops on sandy soils in years of moderate to severe drought. Response was associated with deeper rooting and improved water extraction from the subsoil. No yield increases were recorded with autumn-sown crops which were largely grown on the medium and heavy textured soils. There was a trend towards yield reductions on deep silty soils in wetter years. At one site only did the response to phosphorus and potassium fertilizer incorporated into the subsoil exceed that of fertilizer applied to the topsoil.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1475-2743.1987.tb00720.x
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