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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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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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