Corrigendum - Frequency of annual species of Medicago on the major soil groups of the Mcquarie region of New South Wales

1960 ◽  
Vol 11 (5) ◽  
pp. 705
Author(s):  
WD Andrew ◽  
FW Hely
Keyword(s):  
New South ◽  
New South Wales ◽  
Salt Content ◽  
Acid Group ◽  
Soluble Salt ◽  
Annual Species ◽  
South Wales ◽  
Soil Groups ◽  
Soil Habitat ◽  
Poor Drainage

The frequency of eight annual species of Medicago was determined on 10 soil groups in a region climatically favourable for medics. They occurred on nine of these, the overall frequency being in the order M. minima (L.) Bart. > M. denticulata Willd. > M. laciniata (L.) Mill., M. praecox DC., M. tribuloides Desr., and M. orbicularis (L.) Bart. > M. arabica (L.) Huds. and M. confinis Koch. M. minima was more tolerant of variation of soil habitat than any other medic in the region. M. denticulata was most commonly found on the soils of high soluble salt content and showed the greatest tolerance of poor drainage conditions. M. laciniata occurred in greatest abundance on soils of the well-drained brown acid group. M. praecox was most commonly found on soils with a compact gravelly surface. M. tribuloides was recorded on five soil groups but was common only on the black earths. M. orbicularis was confined to the black earth and red loam soils. M. arabica was rarely found, being restricted to lower, fertile, well-drained parts of the landscape, and M. confinis occurred only occasionally and then in association with M. denticulata.

Frequency of annual species of Medicago on the major soil groups of the Mcquarie region of New South Wales

1960 ◽  
Vol 11 (5) ◽  
pp. 705
Author(s):  
WD Andrew ◽  
FW Hely
Keyword(s):  
New South ◽  
New South Wales ◽  
Salt Content ◽  
Acid Group ◽  
Soluble Salt ◽  
Annual Species ◽  
South Wales ◽  
Soil Groups ◽  
Soil Habitat ◽  
Poor Drainage

The frequency of eight annual species of Medicago was determined on 10 soil groups in a region climatically favourable for medics. They occurred on nine of these, the overall frequency being in the order M. minima (L.) Bart. > M. denticulata Willd. > M. laciniata (L.) Mill., M. praecox DC., M. tribuloides Desr., and M. orbicularis (L.) Bart. > M. arabica (L.) Huds. and M. confinis Koch. M. minima was more tolerant of variation of soil habitat than any other medic in the region. M. denticulata was most commonly found on the soils of high soluble salt content and showed the greatest tolerance of poor drainage conditions. M. laciniata occurred in greatest abundance on soils of the well-drained brown acid group. M. praecox was most commonly found on soils with a compact gravelly surface. M. tribuloides was recorded on five soil groups but was common only on the black earths. M. orbicularis was confined to the black earth and red loam soils. M. arabica was rarely found, being restricted to lower, fertile, well-drained parts of the landscape, and M. confinis occurred only occasionally and then in association with M. denticulata.

The urease activity in profiles of five great soil groups from northern New South Wales

1968 ◽  
Vol 28 (1) ◽  
pp. 25-37 ◽  
Author(s):  
Margaret G. Myers ◽  
J. W. McGarity
Keyword(s):  
Urease Activity ◽  
New South ◽  
New South Wales ◽  
South Wales ◽  
Soil Groups

Frequencies of annual species of Medicago on subgroups of the grey and brown soils of heavy texture of the Macquarie Region of New South Wales

1962 ◽  
Vol 13 (5) ◽  
pp. 801 ◽  
Author(s):  
FW Hely
Keyword(s):  
New South ◽  
New South Wales ◽  
Low Frequency ◽  
The Other ◽  
Annual Species ◽  
South Wales

Four broad subgroups were recognized in the grey and brown soils of heavy texture in the Macquarie region of central New South Wales, and five annual species of Medicago (medics) were found occurring naturally on these soils, but with different frequencies on various subgroups. Some medic material was found in all quadrats on three subgroups and in nearly all fields and the majority of quadrats on the soils of the other. Medicago denticulata Willd. dominated one subgroup, occurring in all quadrats of all fields sampled. This species also occurred in approximately three quarters of the fields and half the quadrats sampled on two other subgroups, and was found in half the fields and a quarter of the quadrats of the fourth subgroup. Medicago minima (L.) Bart. showed a contrary preference, occurring with only slight frequency on the first, and with greatest frequency on the fourth subgroup. Medicago laciniata (L.) Mill. and Medicago tribuloides Desr. were of an intermediate nature and occurred principally on soils of the second and third subgroups. Medicago praecox DC. was found only on soils of the fourth subgroup and at low frequency. The nature of associations between medics showed that differences existed between subgroups of soils with respect to the preference of one species or another for them.

An interpretation of the occurrence of diverse types of soils on basalt in Northern NSW and Queensland.

1952 ◽  
Vol 3 (4) ◽  
pp. 391 ◽  
Author(s):  
LJH Teakle
Keyword(s):  
New South ◽  
New South Wales ◽  
Climatic Conditions ◽  
Group Status ◽  
Basalt Flow ◽  
High Rainfall ◽  
Soil Group ◽  
Red Soils ◽  
South Wales ◽  
Soil Groups

This study is confined to a consideration of the genesis of soil patterns formed on basalt in four districts in northern New South Wales and Queensland. The chief features of five distinct groups of soils — probably of great soil group status — recognized in these soil patterns are described. It is concluded that any interpretation based solely on the present climatic conditions is inadequate. It is submitted that, in the patterns described, the different soil groups represented commenced to form during different climatic eras, on a new basalt flow or on a new basalt surface exposed by erosion. In each case the newly initiated soil would be in conformity with the pedogenic environment of the era. For instance, under high rainfall the red soils would be initiated; under low rainfall the black soils would be expected to form. These soils tend to persist unless removed by erosion in spite of subsequent changes in the pedogenic environment. This points to the importance of the time factor in the form of past climatic eras and of geologic erosion in the development of these soil patterns. It is suggested that these pedogenic factors may be important in the development of many soil patterns.

A statistical-chemical characterization of four great soil groups in Southern New South Wales based on orthogonal polynomials

Soil Research ◽  
1970 ◽  
Vol 8 (3) ◽  
pp. 221 ◽  
Author(s):  
JD Colwell
Keyword(s):  
Orthogonal Polynomials ◽  
New South ◽  
New South Wales ◽  
Chemical Properties ◽  
Chemical Characterization ◽  
Soil Classification ◽  
Statistical Procedures ◽  
South Wales ◽  
The Mean ◽  
Soil Groups

Statistical procedures are described for the characterization and comparison of profiles within soil classification units. Profile trends in a measured characteristic are represented by the coefficients of orthogonal polynomials in depth, and these coefficients are used as observations for standard statistical procedures. The mean of the respective coefficients provides estimates of the mean profiles for the classification units, and the variance-covariance matrix of the coefficients can be used to calculate the confidence intervals of these means. Differences between the mean profiles can be tested by analyses of variance. The variability of a range of chemical properties in the profiles of four Great Soil Groups, viz. yellow podzolic, red earth, red-brown earth, and grey clay, is described. The characterization is based on the analysis of profiles sampled from areas of about 0.4 ha chosen to represent cultivated examples of the groups in southern New South Wales. Variability of most soil properties is greater between these areas than within them, notable exceptions being exchangeable calcium and magnesium within the grey clay Group. This high localized variability is attributed to the gilgaied nature of this group in this region. Also variation between the soil groups is generally greater than within the groups. The differences seem, however, of limited importance from the point of view of soil fertility.

Behaviour of annual species of Medicago introduced into a Medicago minima (L). Bart.–dominant disclimax community

1962 ◽  
Vol 13 (2) ◽  
pp. 212 ◽  
Author(s):  
WD Andrew
Keyword(s):  
Dominant Species ◽  
New South ◽  
New South Wales ◽  
Annual Species ◽  
South Wales

Of the 11 medics introduced into a disclimax community in which M. minima (L.) Bart. was the dominant species in the herbaceous stratum, the only ones which successfully competed with the naturalized medic were: M. confinis Koch, M. scutellata (L.) Mill., M. tribuloides Desr., and M. turbinata (L.) Willd. The last two species are considered the most suitable for widespread testing on well-drained black soils in northern New South Wales.

Estimations of sampling intensities for the characterization of soil within experiment sites

1971 ◽  
Vol 11 (52) ◽  
pp. 541
Author(s):  
JD Colwell
Keyword(s):  
Soil Profile ◽  
Field Experiments ◽  
New South ◽  
New South Wales ◽  
Chemical Properties ◽  
Soil Core ◽  
Core Samples ◽  
South Wales ◽  
Soil Groups

Estimates are made of the desirable number of soil core samples that should be taken from the sites of field experiments for the estimation of profile trends in chemical properties for between site comparisons. The estimates are made on the basis of the magnitude of within site variance relative to between site variance. Fewer samples are required when between site variance is high than when it is low. The data were obtained from the sites of experiments representing four great soil groups in southern New South Wales. The desirable number of samples varies amongst the soil groups, with the chemical properties and with depth down the soil profile. Estimates for mean profile trends and for the means of individual depth strata were similar, It is concluded that at least 9 to 12 core samples should be taken per site and preferably 29 to 40 to ensure reasonably safe estimates of profile trends in important chemical properties.

Frequencies of annual species of Medicago on brown acid soils of the Macquarie region of New South Wales

1964 ◽  
Vol 15 (1) ◽  
pp. 50 ◽  
Author(s):  
FW Hely ◽  
J Brockwell
Keyword(s):  
High Frequency ◽  
New South ◽  
New South Wales ◽  
Low Frequency ◽  
Acid Soils ◽  
Annual Species ◽  
Annual Legumes ◽  
South Wales ◽  
Soil Landscape ◽  
Landscape Units

The distribution of naturalized annual species of Medicago (medics) was studied on the brown acid soils of the Macquarie region of New South Wales, an area approximately 80 miles by 40 miles in extent. Four soil-landscape units were defined and one of these units was subdivided geographically into three parts. Four medics were found: Medicago minima (L.) Bart. and Medicago laciniata (L.) Mill. were by far the dominant annual legumes, occurring in many places at high frequency; Medicago denticulata Willd. and Medicago praecox DC. occurred at few sites and only at low frequency. Marked differences with respect to frequencies of medics were found both between soil-landscape units and the geographical subdivisions. On each unit and subdivision the frequency of M. minima in quadrats was consistently higher than that of M. laciniata. Association between M. minima and M. laciniata in quadrats was variable, but tended to be positive where these two medics occurrcd at low frequency and negative where they occurred at high frequency.

Factors Associated With Density of Mitchell Grass Pastures in North-Western New South Wales.

1997 ◽  
Vol 19 (1) ◽  
pp. 40 ◽  
Author(s):  
AM Bowman ◽  
DJ Munnich ◽  
KY Chan ◽  
J Brockwell
Keyword(s):  
Plant Density ◽  
Rhizobium Meliloti ◽  
New South ◽  
New South Wales ◽  
Good Condition ◽  
Grazing Pressure ◽  
Annual Species ◽  
Basal Diameter ◽  
Poor Condition ◽  
South Wales

Thirty-eight paddocks on 23 properties in the Walgett Shire of north-westem New South Wales were surveyed in April and May 1993 to identify factors that affected Mitchell grass (Astrebla lappacea) plant density. Low densities of Mitchell grass were associated with the occurrence of at least one flood in the last 20 years. Soils from paddocks described by landholders as in poor condition, and where Mitchell grass density was low, were more alkaline and had significantly higher electrical conductivity than soils from paddocks described as in good condition, and where Mitchell grass density was high. Paddocks in poor condition had higher organic carbon and mineralisable nitrogen levels and higher soil populations of Rhizobium meliloti. These latter characteristics were attributed to these pastures having a high component of annual species, including Medicago species, which returned substantial amounts of carbon and nitrogen to the soil. Where Mitchell grass density was moderate, other palatable species were common and biodiversity was high. However, in paddocks with the lowest densities of Mitchell grass, both annual species and unpalatable perennials were common. Low basal diameter of Mitchell grass plants and low Mitchell grass density, were associated with higher grazing pressure. The data suggested that the Mitchell grass ecosystem in north-westem New South Wales is prone to deterioration on the more alkaline and saline soils and where inundation by flooding or waterlogging is common.

Sign in / Sign up

Export Citation Format

Share Document