Zobrazeno 1 - 10
of 61
pro vyhledávání: '"Margrethe Askegaard"'
Publikováno v:
Pandey, A, Li, F, Askegaard, M, Rasmussen, I A & Olesen, J E 2018, ' Nitrogen balances in organic and conventional arable crop rotations and their relations to nitrogen yield and nitrate leaching losses ', Agriculture, Ecosystems & Environment, vol. 265, no. October, pp. 350-362 . https://doi.org/10.1016/j.agee.2018.05.032
Nitrogen (N) flows in organic cropping systems differ considerably from those in conventional systems. The difference is particularly due to the N in organic materials in organic systems as opposed to the mineral N in fertilizer in conventional syste
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e3a52cf26e9b2db2a728fb125ca4ec93
https://pure.au.dk/portal/da/publications/nitrogen-balances-in-organic-and-conventional-arable-crop-rotations-and-their-relations-to-nitrogen-yield-and-nitrate-leaching-losses(b57b5606-5f4b-4c71-a752-f382d4699a95).html
https://pure.au.dk/portal/da/publications/nitrogen-balances-in-organic-and-conventional-arable-crop-rotations-and-their-relations-to-nitrogen-yield-and-nitrate-leaching-losses(b57b5606-5f4b-4c71-a752-f382d4699a95).html
Productivity of organic and conventional arable cropping systems in long-term experiments in Denmark
Autor:
Eva Maria Cordoba Jimenez, Margrethe Askegaard, Jørgen E. Olesen, Ilse A. Rasmussen, Ambreen Shah
Publikováno v:
Shah, A, Askegaard, M, Rasmussen, I A, Cordoba Jimenez, E M & Olesen, J E 2017, ' Productivity of organic and conventional arable cropping systems in long-term experiments in Denmark ', European Journal of Agronomy, vol. 90, pp. 12-22 . https://doi.org/10.1016/j.eja.2017.07.001
A field experiment comparing different arable crop rotations was conducted in Denmark during 1997–2008 on three sites varying in climatic conditions and soil types, i.e. coarse sand (Jyndevand), loamy sand (Foulum), and sandy loam (Flakkebjerg). Th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e3839c54f0b9abed3fa77cc65ba87b81
https://pure.au.dk/portal/da/publications/productivity-of-organic-and-conventional-arable-cropping-systems-in-longterm-experiments-in-denmark(a7157476-dc37-4f15-a4f7-4915e2787aab).html
https://pure.au.dk/portal/da/publications/productivity-of-organic-and-conventional-arable-cropping-systems-in-longterm-experiments-in-denmark(a7157476-dc37-4f15-a4f7-4915e2787aab).html
Publikováno v:
Rasmussen, I A, Melander, B, Askegaard, M, Kristensen, K & Olesen, J E 2014, ' Elytrigia repens population dynamics under different management schemes in organic cropping systems on coarse sand ', European Journal of Agronomy, vol. 58, pp. 18-27 . https://doi.org/10.1016/j.eja.2014.04.003
Elytrigia repens is a noxious perennial weed in organic cropping systems in Scandinavia. It can easily spread in any crop type and reach unacceptable infestation levels through its proliferation from rhizome fragments. This study aimed at analyzing a
Publikováno v:
Sapkota, T B, Askegaard, M, Lægdsmand, M & Olesen, J E 2012, ' Effects of catch crop type and root depth on nitrogen leaching and yield of spring barley ', Field Crops Research, vol. 125, pp. 129-138 . https://doi.org/10.1016/j.fcr.2011.09.009
Catch crop root growth and nitrogen (N) uptake from both shallow and deeper soil layers are important for N management in arable farming systems, particularly in climates where excess winter precipitation induces N leaching. We simulated the root gro
Publikováno v:
Askegaard, M, Olesen, J E, Rasmussen, I A & Kristensen, K 2011, ' Nitrate leaching from organic arable crop rotations is mostly determined by autumn field management ', Agriculture, Ecosystems & Environment, vol. 142, no. 3-4, pp. 149-160 . https://doi.org/10.1016/j.agee.2011.04.014
Two main challenges facing organic arable farming are the supply of nitrogen (N) to the crop and the control of perennial weeds. Nitrate leaching from different organic arable crop rotations was investigated over three consecutive four-year crop rota
Autor:
Margrethe Askegaard, Ingrid K. Thomsen, Jørgen Berntsen, Mogens S. Hovmøller, Kristian Kristensen
Publikováno v:
Askegaard, M, Thomsen, I K, Berntsen, J, Hovmøller, M S & Kristensen, K 2011, ' Performance of spring barley varieties and variety mixtures as affected by manure application and their order in an organic crop rotation ', Acta Agriculturae Scandinavica, Section B-Soil & Plant Science, vol. 61, no. 5, pp. 421-430 . https://doi.org/10.1080/09064710.2010.501340
In order to obtain a high and stable yield of organic spring barley, production should be optimized according to the specific environment. To test the performance of spring barley varieties under varying cropping conditions, a field experiment was ca
Autor:
Margrethe Askegaard, Jørgen Eriksen
Publikováno v:
Askegaard, M & Eriksen, J 2007, ' Growth of legume and nonlegume catch crops and residual-N effects in spring barley on coarse sand ', Journal of Plant Nutrition and Soil Science, vol. 170, pp. 773-780 . https://doi.org/10.1002/jpln.200625222
The aim of this experiment was to investigate the growth and residual-nitrogen (-N) effects of different catch-crop species on a low–N fertility coarse sandy soil. Six legumes (white clover [Trifolium repens L.], red clover [Trifolium pratense L.],
Publikováno v:
Rasmussen, I A, Askegaard, M, Olesen, J E & Kristensen, K 2006, ' Effects on weeds of management in newly converted organic crop rotations in Denmark ', Agriculture, Ecosystems & Environment, vol. 113, pp. 184-195 . https://doi.org/10.1016/j.agee.2005.09.007
We investigated the effects on annual weeds of location, weed control, manure application and catch crops and their interactions in a crop rotation with cereals and pulses for grain during conversion to organic farming in order to better understand t
Publikováno v:
Soil Use and Management. 19:96-103
Crops on sandy soils (
Publikováno v:
University of Copenhagen
The aim of the present study was to determine long-term K release rates from soil by use of a modified resin method, where vigorous agitation and soil–resin separations were avoided to minimise the dissolution of the soil minerals. Resins saturated