Abstract
New cropping practices such as single-grain seeding, lower seed densities with stronger cultivars, wide inter-row spacings and camera-guided side-shift control for weed hoeing facilitate mechanical weed control in oilseed rape. In a two-year field study in Southwestern Germany, camera-guided inter-row hoeing was compared to standard herbicide treatments and untreated control. Seeding with 12.5, 25 and 50 cm inter-row spacing was included as a second factor in the experiment. Weed and crop density were measured directly after treatment. Weed and crop biomass, oilseed rape root diameter and nitrogen uptake were assessed before winter. Seed yield was measured at harvest with a plot combine harvester. In 2021, hoeing in 50 cm inter-row spacing achieved equal weed control efficacy as the herbicide treatment (65–75%). In 2022, hoeing did not reduce weed density, probably due to heavy rainfalls during the first and second pass of hoeing. However, herbicide treatments controlled 92% of the weeds. In 2021, hoeing significantly increased oilseed rape shoot biomass and root diameter compared to the herbicide treatment and the untreated control. Hoeing in 50 cm inter-row spacing resulted in equal yield as the herbicide treatment. In 2022, weed control treatments and inter-row spacing had no effect on oilseed rape biomass, root diameter and yield. This study shows the potential and limitations of weed hoeing in oilseed rape. It also underlines the strong ability of modern oilseed rape cultivars to suppress annual broadleaved weeds.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 7
Claim · model-written summary
In 2021, hoeing at 50 cm row spacing matched herbicide weed control efficacy of 65–75%.
- Taxon
- winter oilseed rape
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napust0 - Treatment
- hoeing in 50 cm inter-row spacinge0
- Interactor
- weede0weed
- Outcome
- weed control efficacye0
- Direction
- equale0
- Value
- 65–75%e0
- Comparator
- herbicide treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e0“In 2021, hoeing in 50 cm inter-row spacing achieved equal weed control efficacy as the herbicide treatment (65–75%)”
t0“winter oilseed rape”
Claim · model-written summary
In 2022, hoeing did not reduce weed density.
- Taxon
- winter oilseed rapeBrassica napust0
- Treatment
- hoeinge0
- Interactor
- weede0weed
- Outcome
- weed densitye0
- Direction
- did not reducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 2022, hoeing did not reduce weed density”
t0“winter oilseed rape”
Claim · model-written summary
In 2022, herbicide treatments controlled 92% of weeds.
- Taxon
- winter oilseed rapeBrassica napust0
- Treatment
- herbicide treatmentse0
- Interactor
- weedse0weed
- Outcome
- weedse0
- Direction
- controllede0
- Value
- 92%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“herbicide treatments controlled 92% of the weeds”
t0“winter oilseed rape”
Claim · model-written summary
In 2021, hoeing significantly increased oilseed rape shoot biomass and root diameter versus herbicide and untreated controls.
- Taxon
- oilseed rapeBrassica napuse0
- Treatment
- hoeinge0
- Outcome
- shoot biomass and root diametere0
- Direction
- increasede0
- Comparator
- the herbicide treatment and the untreated controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 2021, hoeing significantly increased oilseed rape shoot biomass and root diameter compared to the herbicide treatment and the untreated control”
Claim · model-written summary
Hoeing at 50 cm row spacing produced yield equal to herbicide treatment.
- Taxon
- winter oilseed rapeBrassica napust0
- Treatment
- Hoeing in 50 cm inter-row spacinge0
- Outcome
- yielde0
- Direction
- equale0
- Comparator
- herbicide treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Hoeing in 50 cm inter-row spacing resulted in equal yield as the herbicide treatment”
t0“winter oilseed rape”
Claim · model-written summary
In 2022, weed control treatments and row spacing had no effect on oilseed rape biomass, root diameter, or yield.
- Taxon
- oilseed rapeBrassica napuse0
- Treatment
- weed control treatments and inter-row spacinge0
- Outcome
- biomass, root diameter and yielde0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 2022, weed control treatments and inter-row spacing had no effect on oilseed rape biomass, root diameter and yield”
Claim · model-written summary
Modern oilseed rape cultivars were judged able to suppress annual broadleaved weeds.
- Taxon
- oilseed rapeBrassica napuse0
- Material
- modern oilseed rape cultivarse0
- Interactor
- annual broadleaved weedse0weed
- Outcome
- suppress annual broadleaved weedse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“strong ability of modern oilseed rape cultivars to suppress annual broadleaved weeds”
The same questions in other papers
herbicide · yield · Brassica napus (oilseed rape)Results differ
18 papers in the same direction as this paper · 32 in the opposite direction
- positive
- positive
- positive
47 papers more in this group
See all 51 papers →density · weed · Brassica napus (oilseed rape)Positive and negative results
4 papers in the same direction as this paper · 2 reporting no difference from an alternative
- positive
- no effect
- no effect
3 papers more in this group
See all 7 papers →herbicide · weed · Brassica napus (oilseed rape)Positive and negative results
22 papers in the same direction as this paper · 3 in the opposite direction
- negative
- positive
- positive
22 papers more in this group
See all 26 papers →density · yield · Brassica napus (oilseed rape)Positive and negative results
31 papers in the same direction as this paper · 54 in the opposite direction
- positive
- negative
- positive
82 papers more in this group
See all 86 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.