18 Result(s)

Article

On the distribution of fungi in the rhizospheres of oats

C. G. C. Chesters, D. Parkinson in Plant and Soil (1959)

Article

Fungi associated with the seedling roots ofAllium porrum L.

Data is provided on the fungi isolated from the roots ofAllium porrum which have been grown in three soils. These data show that the roots support a typical root-surface mycoflora, although this is more sparse th...

D. Parkinson, J. H. Clarke in Plant and Soil (1960)

Article

A method for isolating fungi from soil microhabitats

A technique is described for the separation and washing of soil micro-habitats (the separation being on a size basis). Tests of the efficiency of the washing technique show that, for the soil under experiment,...

D. Parkinson, S. T. Williams in Plant and Soil (1960)

Article

The sites of excretion of ninhydrin-positive substances by broad bean seedlings

A simple method is described for determining the sites of excretion of ninhydrin-positive substances from the undamaged roots of seedlings of broad bean. Results are given on the sites of excretion of such sub...

R. Pearson, D. Parkinson in Plant and Soil (1960)

Article

The growth of saprophytic fungi on root surfaces

Data are provided on the growth of non-pathogenic soil fungi on root surfaces. By growing roots from non-sterile soil into sterile vermiculite, and by regular isolation of fungi from the roots which had grown ...

G. S. Taylor, D. Parkinson in Plant and Soil (1961)

Article

Studies on fungi in the root region

Tabulated information on the colonization of roots of barley, cabbage and dwarf bean by fungi during the first 10 days of root development is given. These data, obtained by isolation and direct observation stu...

D. Parkinson, G. S. Taylor, R. Pearson in Plant and Soil (1963)

Article

Studies on fungi in the root region

Information is given on the effects of soil temperature, moisture, and pH on the development of fungi on the root surfaces of dwarf-bean seedlings. These data are summarized in tabular form, and are discussed ...

G. S. Taylor, D. Parkinson in Plant and Soil (1964)

Article

Studies on fungi in the root region

Data are given on the fungi isolated from 30-day-old adventitious roots and seedling roots of severalAllium species by means of the root-washing technique. These fungi were typical root-surface forms includingCyl...

D. Parkinson, J. H. Clarke in Plant and Soil (1964)

Article

An examination of the soil washing technique by its application to several soils

The soil-washing technique is discussed in relation to its efficiency in removing fungal spores from soil samples and to its application for studying soil microhabitats. Detailed data on the application of the...

S. T. Williams, D. Parkinson, N. A. Burges in Plant and Soil (1965)

Article

Studies on fungi in the root region

By studies on selected sterile dark fungi isolated from barley roots, an attempt is made to explain the ability of these fungi to colonize young roots. Studies on growth rate in soil and competitive ability in...

D. Parkinson, R. Pearson in Plant and Soil (1967)

Article

Studies on fungi in the root region

A study of the colonization of barley root surfaces by sterile dark fungi is described in which the root washing-segment plating technique and direct observation were employed to study the pattern of root colo...

D. Parkinson, R. Pearson in Plant and Soil (1967)

Article

Studies on fungi in the root region

Qualitative studies have been made on the fungi in the rhizosphere of dwarf-bean plants using the soil-washing technique. The results obtained show small but consistent differences between rhizosphere and non-...

D. Parkinson, A. Thomas in Plant and Soil (1969)

Article

Topsoil storage effects on primary production and rates of vesicular-arbuscular mycorrhizal development inAgropyron trachycaulum

A greenhouse study was conducted to determine the effects of stockpiling prairie grassland topsoil for 3 years on mycorrhizal development and root and shoot production of slender wheatgrass. The vesicular-arbu...

S. Visser, C. L. Griffiths, D. Parkinson in Plant and Soil (1984)

Article

Effect of topsoil storage on microbial activity, primary production and decomposition potential

The effects of disturbing (cultivating) and stockpiling prairie grassland topsoil on microbial activity, microbial biomass C, plant production and decomposition potentials were studied by measuring CO₂ efflux fro...

S. Visser, J. Fujikawa, C. L. Griffiths, D. Parkinson in Plant and Soil (1984)

Article

Influence of the herbicide glyphosate on soil microbial community structure

The side effects of glyphosate on the soil microflora were monitored by applying a range of glyphosate concentrations (0, 2, 20, and 200 μg g⁻¹ herbicide) to incubated soil samples, and following changes in vario...

D. A. Wardle, D. Parkinson in Plant and Soil (1990)

Article

Effects of three herbicides on soil microbial biomass and activity

Three post-emergence herbicides (2,4-D, picloram and glyphosate) were applied to samples of an Alberta agricultural soil at concentrations of 0, 2, 20, and 200 μg g⁻¹. The effects of these chemicals on certain mi...

D. A. Wardle, D. Parkinson in Plant and Soil (1990)

Article

Relative importance of the effect of 2,4-D, glyphosate, and environmental variables on the soil microbial biomass

Two post-emergence herbicides (glyphosate and 2,4-D) were applied at field application levels to tilled field plots in a mixed crop** area in south-central Alberta. The effects of these chemicals on certain ...

D. A. Wardle, D. Parkinson in Plant and Soil (1991)

Article

Immobilization and availability of N and P in the forest floors of fertilized Rocky Mountain coniferous forests

The rates of key processes related to the recycling of nutrients in the forest floor were monitored for four years following the application of ammonium phosphate sulphate to small plots in mature stands of lo...

C. E. Prescott, J. P. Corbin, D. Parkinson in Plant and Soil (1992)