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| Rasmussen, Jesper; Bibby, Bo Martin; Schou, Anders P.. |
| In six field experiments it was investigated whether row spacing, timing, direction and orientation of post-emergence weed harrowing in spring barley influenced the selectivity and whether it is important that increasing intensities of harrowing are generated either by increasing number of passes or increasing driving speed. Selectivity was defined as the relationship between crop burial in soil immediately after treatment and weed control. To estimate crop burial, digital image analysis was used in order to make the estimations objective. The study showed that narrow row spacing decreased selectivity in a late growth stage (21) whereas row spacing in the range of 5.3 cm to 24 cm had no effects in an early growth stage (12). Harrowing across rows decreased... |
| Tipo: Journal paper |
Palavras-chave: Weed management; Technology transfer. |
| Ano: 2008 |
URL: http://orgprints.org/14987/1/14987.pdf |
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