Abstract
The effects of different periods of weed competition and of trifluralin (α,α,α-trifluro-2,6-dinitro-N,N-dipropyl-p-toluidine), niclofen (2,4-dichloro-phenyl-p-nitrophenyl ether), and cultivations were studied for effects on yield of rutabaga (Brassica napobrassica Mill. ’York’). Delaying weed removal for 4 wk after crop emergence significantly reduced yields of marketable and total roots compared with plots kept weed-free all season. Delayed weeding beyond 4 wk resulted in progressively greater reductions in yield. Rutabagas kept weed-free for 2, 4, 6, and 8 wk from crop emergence by once-weekly weeding gave yields comparable to those kept weed-free all season. Herbicide treatments without hand-weeding gave significantly lower yields than those with one hand-weeding. The use of three hand-weedings with herbicides was not significantly better than herbicides with one hand-weeding. Level of weed control was dependent on weed species present in the test area; however, a combination of trifluralin and niclofen gave a broader spectrum of control and better crop yields than either used alone.
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Claims 8
Claim · model-written summary
Weed removal delayed four weeks significantly reduced marketable and total root yields relative to season-long weed-free plots.
- Taxon
- RUTABAGA
Brassica napus subsp. rapiferat0 - Treatment
- Delaying weed removal for 4 wk after crop emergencee0
- Interactor
- weede0weed
- Outcome
- yields of marketable and total rootse0
- Direction
- reducede0
- Comparator
- plots kept weed-free all seasone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Delaying weed removal for 4 wk after crop emergence significantly reduced yields of marketable and total roots compared with plots kept weed-free all season.”
t0“RUTABAGA”
Claim · model-written summary
Weeding later than four weeks caused progressively larger yield reductions.
- Taxon
- RUTABAGABrassica napus subsp. rapiferat0
- Treatment
- Delayed weeding beyond 4 wke0
- Interactor
- weede0weed
- Outcome
- yielde0
- Direction
- reductionse0
- Comparator
- 4 wke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Delayed weeding beyond 4 wk resulted in progressively greater reductions in yield.”
t0“RUTABAGA”
Claim · model-written summary
Weekly weeding for two, four, six or eight weeks gave yields comparable to season-long weed-free conditions.
- Taxon
- RutabagasBrassica napus subsp. rapiferae0
- Treatment
- once-weekly weedinge0
- Interactor
- weede0weed
- Outcome
- yieldse0
- Direction
- comparablee0
- Comparator
- those kept weed-free all seasone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rutabagas kept weed-free for 2, 4, 6, and 8 wk from crop emergence by once-weekly weeding gave yields comparable to those kept weed-free all season.”
Claim · model-written summary
Herbicides without hand-weeding yielded significantly less than herbicides with one hand-weeding.
- Taxon
- RUTABAGABrassica napus subsp. rapiferat0
- Treatment
- Herbicide treatments without hand-weedinge0
- Interactor
- weede0weed
- Outcome
- yieldse0
- Direction
- lowere0
- Comparator
- those with one hand-weedinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Herbicide treatments without hand-weeding gave significantly lower yields than those with one hand-weeding.”
t0“RUTABAGA”
Claim · model-written summary
Three hand-weedings with herbicides were not significantly better than one hand-weeding with herbicides.
- Taxon
- RUTABAGABrassica napus subsp. rapiferat0
- Treatment
- three hand-weedings with herbicidese0
- Interactor
- weede0weed
- Outcome
- bettere0
- Direction
- not significantly bettere0
- Comparator
- herbicides with one hand-weedinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of three hand-weedings with herbicides was not significantly better than herbicides with one hand-weeding.”
t0“RUTABAGA”
Claim · model-written summary
The degree of weed control depended on weed species in the test area.
- Taxon
- RUTABAGABrassica napus subsp. rapiferat0
- Interactor
- weed speciese0weed
- Outcome
- Level of weed controle0
- Setting
- test areae0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Level of weed control was dependent on weed species present in the test area”
t0“RUTABAGA”
Claim · model-written summary
Combined trifluralin and niclofen controlled a broader weed spectrum than either alone.
- Taxon
- RUTABAGABrassica napus subsp. rapiferat0
- Treatment
- a combination of trifluralin and niclofene0
- Outcome
- broader spectrum of controle0
- Direction
- broadere0
- Comparator
- either used alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a combination of trifluralin and niclofen gave a broader spectrum of control and better crop yields than either used alone.”
e1“Level of weed control was dependent on weed species present in the test area”
t0“RUTABAGA”
Claim · model-written summary
Combined trifluralin and niclofen produced better crop yields than either alone.
- Taxon
- RUTABAGABrassica napus subsp. rapiferat0
- Treatment
- a combination of trifluralin and niclofene0
- Outcome
- crop yieldse0
- Direction
- bettere0
- Comparator
- either used alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a combination of trifluralin and niclofen gave a broader spectrum of control and better crop yields than either used alone.”
e1“Level of weed control was dependent on weed species present in the test area”
t0“RUTABAGA”
The same questions in other papers
trifluralin · yield · Brassica napus (oilseed rape)Results differ
2 papers in the same direction as this paper · 2 in the opposite direction
- negative
- negative
- positive
1 paper more in this group
See all 5 papers →trifluralin · control · Brassica napus (oilseed rape)Results agree
1 paper in the same direction as this paper
- positive
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 →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.