Výsledky vyhledávání - "J. T. O'Donovan"

Potassium release during decomposition of crop residues under conventional and zero tillage

Autor: N Z Lupwayi, G W Clayton, J T O’Donovan, K N Harker, T K Turkington, Y K Soon

Publikováno v: Canadian Journal of Soil Science. 86:473-481

Nutrient cycling is an important part of integrated nutrient management. The litterbag method was used in field experiments to determine potassium (K) release patterns from red clover (Trifolium pratense) green manure (GM), field pea (Pisum sativum),

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0b0581ad92014fc36f1cecd58ea4e5b0
https://doi.org/10.4141/s05-049

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A possible involvement of gibberellin in the mechanism ofAvenafatuaresistance to triallate and cross‐resistance to difenzoquat

Autor: Robert E. Blackshaw, Abdur Rashid, A.K. Azad Khan, R. P. Pharis, J. T. O'Donovan, K. N. Harker

Publikováno v: Weed Research. 38:461-466

Avena fatua L. populations from numerous fields in Alberta have simultaneously developed resistance to recommended rates of two dissimilar herbicides, triallate and difenzoquat. We used exogenous applications of gibberellic acid (GA 3 ) to investigat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3784e64c8818f2f435befd0bc9ca8b7f
https://doi.org/10.1046/j.1365-3180.1998.00115.x

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Crop sequence effects on root maggot (Diptera: Anthomyiidae: Delia spp.) infestations in canola

Autor: L M, Dosdall, K N, Harker, J T, O'Donovan, R E, Blackshaw, H R, Kutcher, Y, Gan, E N, Johnson

Publikováno v: Journal of economic entomology. 105(4)

Strong market demand for canola, Brassica napus L., has prompted some western Canadian producers to increase the frequency of this crop in rotations with other crop species, but the impact of this practice on canola insect pests has not been determin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::f9188296f7da65afe637435071e6ebdf
https://pubmed.ncbi.nlm.nih.gov/22928305

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Relationship between relative time of emergence of Tartary buckwheat (Fagopyrum tataricum) and yield loss of barley

Autor: J. T. O’Donovan, A. S. McClay

Publikováno v: Canadian Journal of Plant Science. 82:861-863

A nonlinear regression model was used to describe the relationship between Tartary buckwheat [Fagopyrum tataricum (L.) Gaertn.] density and relative time of emergence, and yield of barley (Hordeum vulgare L.). Yield loss increased the earlier the wee

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4f11a7bb4dda6c02e08dc25c197f60b9
https://doi.org/10.4141/p02-042

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Seed yields of canola and volunteer barley as influenced by their relative times of emergence

Autor: J. T. O’Donovan

Publikováno v: Canadian Journal of Plant Science. 72:263-267

A model based on the rectangular hyperbola was used to describe the effects of population density and relative time of emergence of volunteer barley (Hordeum vulgare L. ’Klondike’) on seed yield of both canola (Brassica campestris L. ’Tobin’)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9e7cbefb3cb1bdf09ce2429443f970dd
https://doi.org/10.4141/cjps92-031

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Effects of canola-wheat intercrops on Delia spp. (Diptera: Anthomyiidae) oviposition, larval feeding damage, and adult abundance

Autor: J D, Hummel, L M, Dosdall, G W, Clayton, K N, Harker, J T, O'Donovan

Publikováno v: Journal of economic entomology. 102(1)

Reductions in oviposition and subsequent damage by root maggots (Diptera: Anthomyiidae, Delia spp.) to brassicaceous crops in the presence of nonhost plants has been demonstrated, but such investigations have not been conducted using intercrops of sp

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::80554c98ee6469dbae1dd6eb9265dd80
https://pubmed.ncbi.nlm.nih.gov/19253640

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