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Cut fallow to replace black fallow in an organic production system Organic Eprints
Bergkvist, Göran; Mangerud, Kjell; Magnuski, Ewa; Brandsæter, Lars Olav.
Couch grass (Elymus repens) has large impact on yield and management strategies in temperate areas of the world. The control is to a large extent based on repeated soil cultivations in organic farming. Our aim was to investigate methods to improve the competitive effect of white clover by management. The hypothesis was that cutting (fragmentation) of the rhizomes by making slits in the soil by a spade (spading) would increase the number of couch grass shoots, thus improve the effect of repeated mowing. We conclude that Cross cutting to 10 cm could reduce the amount of rhizomes, but that the effect is variable. We also conclude that the cross cutting do not improve the effect of mowing. Cross cutting reduce the amounts of couch grass shoots.
Tipo: Conference paper, poster, etc. Palavras-chave: Weed management.
Ano: 2015 URL: http://orgprints.org/29406/1/Bergkvist%20et%20al.%202015%20Proceedings_FSD5.pdf
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Effects of renewal time, taproot cutting, ploughing practice, false seedbed and companion crop on docks (Rumex spp.) when renewing grassland Organic Eprints
Ringselle, Björn; Berge, Therese W.; Stout, Daniel; Breland, Tor Arvid; Hatcher, Paul E.; Haugland, Espen; Koesling, Matthias; Mangerud, Kjell; Lunnan, Tor; Brandsæter, Lars Olav.
Docks (Rumex spp.) are a considerable problem in grassland production worldwide. We investigated how different cultural management techniques affected dock populations during grassland renewal: (I) renewal time, (II) companion crop, (III) false seedbed, (IV) taproot cutting (V), plough skimmer and (VI) ploughing depth. Three factorial split-split plot experiments were carried out in Norway in 2007–2008 (three locations), 2008–2009 (one location) and 2009 (one location). After grassland renewal, more dock plants emerged from seeds than from roots. Summer renewal resulted in more dock seed and root plants than spring renewal. Adding a spring barley companion crop to the grassland crop often reduced dock density and biomass. A false seedbed resulted in 71%...
Tipo: Journal paper Palavras-chave: Weed management.
Ano: 2019 URL: http://orgprints.org/34271/1/Ringselle%20et%20al%202019%20Effects%20of%20renewal%20time%20taproot%20cutting%20ploughing%20practice%20false%20seedbed%20and%20companion%20crop%20on%20docks.pdf
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Interactions between pre- and post-emergence weed harrowing in spring cereals Organic Eprints
Brandsæter, Lars O.; Mangerud, Kjell; Rasmussen, Jesper.
Pre- and post-emergence weed harrowing were studied in spring cereals in different environments and with two types of harrows in Norway during 2004–2006. The objectives were to investigate interactions between pre and post-emergence weed harrowing and the importance of harrow type. We hypothesised that pre- and post-emergence harrowing interact positively, that a combination gives more stable weed control effects than pre- and post-emergence weed harrowing used alone, and that a harrow type with bent tines is more aggressive and suitable on hard-packed soils than a harrow with strait tines. The results only supported the last of these hypotheses. Post-emergence weed harrowing controlled a certain percentage of the present weeds, and this percentage was...
Tipo: Journal paper Palavras-chave: Weed management.
Ano: 2012 URL: http://orgprints.org/21137/4/21137.pdf
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Jordarbeidingsmetodar for korndominerte dyrkingssystem – avlingseffektar Organic Eprints
Bakken, Anne Kjersti; Henriksen, Trond; Mangerud, Kjell; Eltun, Ragnar; Riley, Hugh; Fjeld, Tori; Selnes, Svein; Wikmark, Thorbjørn.
I fleirårige, fastliggande forsøk på Planteforsk Apelsvoll og Kvithamar undersøker ein kva traktortyngde, pløyedjup og køyremåte ved pløying har å seie for jordstruktur og avlingar i økologisk korndyrking. Etter to år er det framleis ikkje store utslag for forsøksfaktorane. Avhengig av vekst og tildels traktortyngde er det sikre utslag for pløyedjup, men avlingsvariasjonen innan felt og delvis mellom år er stort sett større. Djup pløying gav gjennomgåande større kornavlingar enn grunn pløying, men for bygg etter grønngjødsling på Kvithamar, som verken var tilført husdyrgjødsel eller mineralgjødsel, vart avlingane størst med grunn pløying.
Tipo: Conference paper, poster, etc. Palavras-chave: Cereals; Pulses and oilseeds Soil tillage.
Ano: 2005 URL: http://orgprints.org/6889/1/gk9_2_bakken_362_367.pdf
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Rhizome Fragmentation by Vertical Disks Reduces Elymus repens Growth and Benefits Italian Ryegrass-White Clover Crops Organic Eprints
Ringselle, Björn; Bertholtz, Erik; Magnuski, Ewa; Brandsæter, Lars Olaf; Mangerud, Kjell; Göran, Bergkvist.
Tillage controls perennial weeds, such as Elymus repens, partly because it fragments their underground storage organs. However, tillage is difficult to combine with a growing crop, which limits its application. The aim of this study was to evaluate how soil vertical cutting with minimum soil disturbance and mowing affect the growth and competitive ability of E. repens in a grass–clover crop. A tractor-drawn prototype with vertical disks was used to fragment E. repens rhizomes with minimal soil and crop disturbance. In experiments performed in 2014 and 2015 at a field site close to Uppsala, Sweden, the rhizomes were fragmented before crop sowing (ERF), during crop growth (LRF), or both (ERF+LRF). Fragmentation was combined with repeated mowing (yes/no) and...
Tipo: Journal paper Palavras-chave: Crop combinations and interactions; Soil biology; Composting and manuring.
Ano: 2017 URL: http://orgprints.org/32625/1/Ringselle-etal-2018-rhizome-fragmentation.pdf
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Ugrasharving i korn Organic Eprints
Mangerud, Kjell; Brandsæter, Lars Olav; Wærnhus, Kjell.
Denne undersøkelsen har som målsetning å finne klarere kriterier om det skal harves, når det skal harves, hvordan harva skal stilles inn og hvilke harvtyper og tindetyper som er optimale på forskjellige jordtyper. Videre skal en se på hvordan underkultur kan tilpasses ugrasharving. Resultatene første år er interessante, men det er for tidlig å trekke konklusjoner.
Tipo: Conference paper, poster, etc. Palavras-chave: Cereals; Pulses and oilseeds Weed management.
Ano: 2005 URL: http://orgprints.org/6029/1/gk9_2_mangerud.pdf
Registros recuperados: 6
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