6 July 2020
Organic Farm Knowledge webinar

Help improve the platform by participating in webinar.

7 July 2020
OF&G National Organic Combinable Crops 2020

Know your soils and know your sales: organic min-till and non-organic no-till webinar



29 June 2020
Benefits and challenges of herbal or diverse leys

Opportunities for farmer involvement

26 June 2020
New resources from OK-Net Ecofeed

New Practice Abstracts and videos



29 April 2020
Tim Bennett is the new Chair of ORC

Former NFU president takes on chairmanship of Organic Research Centre

Interactive effects of cover crops and weeds in low tillage

Category: News
2 September 2019

A new open access article resulting from the OSCAR project has been published in Agronomy and is available online:Interactive Effects of Subsidiary Crops and Weed Pressure in the Transition Period to Non-Inversion Tillage, A Case Study of Six Sites Across Northern and Central Europe.ORC's Sally Westaway is a co-author.

Abstract

Reducing soil tillage can lead to many benefits, but this practice often increases weed abundance and thus the need for herbicides, especially during the transition phase from inversion tillage to non-inversion tillage. We evaluated if subsidiary crops (SCs, e.g., cover crops) can mitigate the effects of non-inversion tillage on weed abundance. Two-year experiments studying SC use, tillage intensity, and nitrogen (N) fertilization level were carried out twice at six sites throughout northern and central Europe. SCs significantly reduced weed cover throughout the intercrop period (−55% to −1% depending on site), but only slightly during the main crops. Overall weed abundance and weed biomass were higher when using non-inversion tillage with SCs compared to inversion tillage without SCs. The effects differed due to site-specific weed pressure and management. With increasing weed pressure, the effect of SCs decreased, and the advantage of inversion over non-inversion tillage increased. N fertilization level did not affect weed abundance. The results suggest that SCs can contribute by controlling weeds but cannot fully compensate for reduced weed control of non-inversion tillage in the transition phase. Using non-inversion tillage together with SCs is primarily recommended in low weed pressure environments.

Reimer M, Ringselle B, Bergkvist G, Westaway S, Wittwer R, Baresel JP, van der Heijden MGA, Mangerud K, Finckh MR, Brandsæter LO (2019). Interactive Effects of Subsidiary Crops and Weed Pressure in the Transition Period to Non-Inversion Tillage, A Case Study of Six Sites Across Northern and Central Europe. Agronomy. 2019; 9(9):495.

Keywords: non-inversion tillage subsidiary cover crops weeds

Return to Archive