A Taxonometric Study of the Sherborne Soil Mapping Unit

Courtney, F. M.; Webster, R.

doi:10.2307/621585

Cited by 10 publications

(4 citation statements)

References 5 publications

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“…These impurities tend to reduce the value of soil surveys for predictive uses, particularly where it is impossible to predetermine the distribution of non-model profiles (Bie and Beckett, 1971). As a result, local variability of soils acts as a major control upon the utility of soil maps, and not surprisingly several studies have been made of within-unit variability (Beckett and Webster, 1971 ;Courtney, 1973;Bascomb and Jarvis, 1976). Soil variability is not only important in relation to the utility of soil maps, however; it also controls the cost of surveying.…”

Section: Applied Aspects Of Soil Studiesmentioning

confidence: 99%

Soil and land potential

Trudgill

Briggs

1977

Progress in Physical Geography: Earth and Environment

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Soil is an integral part of the landscape and it is also a resource which is used by man. As such, there are two areas of development which can be identified within the topic of soil study. One is concerned with environmental processes, where soil can be viewed as a component involved in the interaction between geomorphological, hydrological and biogeographical systems. The other is concerned with the evaluation of the quality of soil resources, their spatial variation and their agricultural uses. The evaluation and uses of soil resources forms the topic of the second half of this review and the interaction of soil systems with other environmental systems is the focus of the first half of the review.

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Section: Applied Aspects Of Soil Studiesmentioning

confidence: 99%

Soil and land potential

Trudgill

Briggs

1977

Progress in Physical Geography: Earth and Environment

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“…In addition to the interpretation of the component loadings derived from the PCA, it is ossible to assign to each observation a 'score' ponent scores have already proven of value to soil studies (Webster and Wong, 1969;Courtney, 1973).…”

Section: Distribution Of Component Scoresmentioning

confidence: 99%

An Assessment of the Relationship Between the Surface Properties of Chalk Soils and Slope Form Using Principal Components Analysis

Anderson

Furley

1975

Journal of Soil Science

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Five line transects were sited over grass-covered, convex-concave slopes in the Berkshire and Wiltshire chalk downs, with the object of describing and interpreting the variation in selected surface soil properties. Previous work had concentrated upon the correlation between single variables and slope gradient and slope length, whereas the emphasis of the present paper lies in examining the interrelationships amongst the variables through the use of principal components analysis.A consistent pattern of variation was established between the five sites. T h e first component derived from the analysis was interpreted as a combined organic matter and soluble constituents factor, which accounted for between 50 and 60 per cent of the total variance. The second component was identified as particlesize variation and accounted for a further 13 to 18 per cent of the total variance.Whereas the distribution of the component scores for the second component supported the original ideaof asharp junction effect in the pattern of soil properties on the slope, the first and most important component indicated a more diffuse transition from net erosion to net deposition conditions.

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“…Powell and Springer (1 965), Wilding et al (1 965) and McCormack and Wilding (1969) are among the few who have attempted any objective analysis of their MU and in the areas studied they found reliabilities of 74, 42 and 37 per cent over 3, 3 and 5 mapping units respectively. In South East England, Burrough (1970) found that the reliability of soil series ranged from 5 0 4 5 per cent while Courtney (1973) showed that in the unglaciated southern Cotswolds the Sherborne MU contained more than 70 per cent of Sherborne series. It is remarkable that none of these studies revealed a mapping unit with less than 15 per cent of inclusions.…”

Section: Introductionmentioning

confidence: 99%

A Reappraisal of Soil Mapping in an Area of Southern Scotland. Part I the Reliability of Four Soil Mapping Units and the Morpholocical Variability of Their Dominant Taxa

Ragg¹,

Henderson²

1980

Journal of Soil Science

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Summary A two stage random sample survey was made to study the composition of four common soil mapping units already mapped in the Central Lowlands of Scotland. The four mapping units were sampled at densities proportional to their mapped area. In terms of their A horizon textures, the mapping units had percentage reliabilities of 84, 96, 93 and 97 and drainage class reliability scores of 70, 80, 72 and 70. On the basis of taxonomic units within the mapping units, percentage reliabilities ranged from 43–66 but no minor constituent soil exceeded 16 per cent in any of the units studied. Although complex according to currently accepted guidelines, such mapping units should be named according to the dominant taxonomic unit. Errors of identification due to inadequate definitions of taxonomic units have contributed to some of the low levels of reliability of taxonomic units within mapping units and soil taxa should be defined more precisely in Scotland. Means and variances of the taxonomic units, upon which the above named mapping units are based, indicate that the four taxonomic units (and hence also mapping units) under study are not equally variable in the area of investigation.

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A Taxonometric Study of the Sherborne Soil Mapping Unit

Cited by 10 publications

References 5 publications

Soil and land potential

Soil and land potential

An Assessment of the Relationship Between the Surface Properties of Chalk Soils and Slope Form Using Principal Components Analysis

A Reappraisal of Soil Mapping in an Area of Southern Scotland. Part I the Reliability of Four Soil Mapping Units and the Morpholocical Variability of Their Dominant Taxa

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