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The influence of soil water content on the uptake of ions by roots. I. Soil water content gradients near a plane of onion roots.

Published online: 01 Jan 1973

Authors: Dunham, R. J. & Nye, P. H.

Content type: Journal article

Journal title: Journal of Applied Ecology

Water content and ion concentration gradients were measured in soil near a plane of onion seedling roots. Using the water content-matric potential rel...

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The pollination of onion (Allium cepa L.) to produce hybrid seed.

Published online: 01 Jan 1975

Authors: Williams, I. H. & Free, J. B.

Content type: Journal article

Journal title: Journal of Applied Ecology

In general, bees collecting nectar only, as well as bees collecting nectar and pollen, preferred male-fertile to male-sterile cultivars of onion plant...

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The measurement of length and distribution of onion roots in the field and the laboratory.

Published online: 22 May 1971

Authors: Baldwin, J. P. & Tinker, P. B. & Marriott, F. H. C.

Content type: Journal article

Journal title: Journal of Applied Ecology

An autoradiographic method for measuring root length in the soil using 32P injected into onion leaves is described. The soil containing the roots was ...

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The pollination of onion (Allium cepa L.) to produce hybrid seed.

Published online: 01 Jan 1976

Authors: Williams, I. H. & Free, J. B.

Content type: Journal article

Journal title: Journal of Applied Ecology

Blocks of onion plants were either caged with honeybee colonies or left uncaged. Although the uncaged plants produced fewer umbels, the weight of seed...

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Soil impedance as a factor reducing crop seedling emergence, and its relation to soil conditions at sowing, and to applied water.

Published online: 01 Jan 1979

Authors: Hegarty, T. W. & Royle, S. M.

Content type: Journal article

Journal title: Journal of Applied Ecology

Seeds of calabrese, carrot, onion and sugar beet were sown in the field on successive occasions. Soil integral impedance (work done in penetrating the...

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A comparison of relative growth rates of different individual plants and different cultivars of onion of diverse geographic origin at two temperatures and two light intensities.

Published online: 01 Jan 1981

Authors: Brewster, J. L. & Barnes, A.

Content type: Journal article

Journal title: Journal of Applied Ecology

In two series of experiments, the relative leaf growth rates (RA) and relative growth rates (RW) of seedlings of 8 onion cvs of diverse geographic ori...

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The influence of soil water content on the uptake of ions by roots. III. Phosphate, potassium, calcium and magnesium uptake and concentration gradients in soil.

Published online: 01 Jan 1977

Authors: Dunham, R. J. & Nye, P. H.

Content type: Journal article

Journal title: Journal of Applied Ecology

Concentration gradients of phosphate, K, Ca and Mg were measured near a plane of onion seedling roots at a range of soil water contents, in a special ...

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The influence of soil water content on the uptake of ions by roots. II. Chloride uptake and concentration gradients in soil.

Published online: 01 Jan 1975

Authors: Dunham, R. J. & Nye, P. H.

Content type: Journal article

Journal title: Journal of Applied Ecology

At higher soil water contents, chloride uptake by onion roots was greater, and the zones of depletion extended further. Models of ion transport were d...

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The measurement of length and distribution of onion roots in the field and the laboratory.

Published online: 20 Oct 1972

Authors: Baldwin, J. P. & Tinker, P. B. & Marriott, F. H. C.

Content type: Journal article

Journal title: Journal of Applied Ecology

The 'Quantimet' Image Analysing Computer was used to measure the length of roots washed out from soil, and a new autoradiographic (32P) method for mea...

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Long-range host-finding behaviour of the onion fly Delia antiqua (Diptera: Anthomyiidae): ecological and physiological constraints.

Published online: 11 Jul 1989

Authors: Judd, G. J. R. & Borden, J. H.

Content type: Journal article

Journal title: Journal of Applied Ecology

The long-range, host-finding behaviour of Delia antiqua was investigated in 16 mark-release-recapture experiments in Canada using onion-reared flies f...

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