Abstract
Abstract Field experiments were conducted during 1966 and 1967 at Mandan, N. D. to evaluate the effects of row spacing (7.5, 15, and 30 cm), irrigation water at fruiting, and weed competition (primarily from Setaria virilis ) on water use by flax ( Linum usitatissinum L.). An irrigation of 50 mm at the fruiting stage increased flaxseed yields only when weeds were controlled, particularly in the dry year of 1967. Flaxseed yields increased at row spacing narrowed from 30 to 7.5 cm only on unweeded plots. Weed growth reduced flaxseed yields for the 2‐year period from 26 to 53%, with the least reduction from 7.5‐cm row spacing. Midsummer rains or supplemental water at fruiting was less effective in increasing flaxseed production when weeds were present, but some degree of weed control was achieved with narrower row spacing. Oil content of flaxseed was not affected by treatments, but iodine number was slightly higher for the wider spacing (30 cm) in 1966. Total water use was not affected by row spacing or weed treatment, but water use efficiency was increased by narrow row spacing and by weed control. Water use patterns indicated deeper root penetration during the drier year.
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Claims 12
Claim · model-written summary
Fruiting-stage irrigation increased flaxseed yield only when weeds were controlled.
- Taxon
- flax
Linum usitatissimume0 - Treatment
- irrigation of 50 mm at the fruiting stagee0
- Outcome
- flaxseed yieldse0
- Direction
- increasede0
- Qualifier
- only when weeds were controllede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An irrigation of 50 mm at the fruiting stage increased flaxseed yields only when weeds were controlled, particularly in the dry year of 1967.”
Claim · model-written summary
Narrowing rows increased yields only in unweeded plots.
- Taxon
- FlaxLinum usitatissimumt0
- Treatment
- row spacing narrowed from 30 to 7.5 cme0
- Outcome
- Flaxseed yieldse0
- Direction
- increasede0
- Qualifier
- only on unweeded plotse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Flaxseed yields increased at row spacing narrowed from 30 to 7.5 cm only on unweeded plots.”
t0“Flax”
Claim · model-written summary
Weed growth cut flaxseed yield by 26 to 53%, least at 7.5 cm rows.
- Taxon
- FlaxLinum usitatissimumt0
- Treatment
- Weed growthe0
- Outcome
- flaxseed yieldse0
- Direction
- reducede0
- Value
- 26 to 53%e0
- Qualifier
- least reduction from 7.5‐cm row spacinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Weed growth reduced flaxseed yields for the 2‐year period from 26 to 53%, with the least reduction from 7.5‐cm row spacing.”
t0“Flax”
Claim · model-written summary
Water at fruiting was less effective for yield when weeds were present.
- Taxon
- FlaxLinum usitatissimumt0
- Treatment
- supplemental water at fruitinge0
- Outcome
- flaxseed productione0
- Direction
- less effectivee0
- Qualifier
- when weeds were presente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“supplemental water at fruiting was less effective in increasing flaxseed production when weeds were present”
t0“Flax”
Claim · model-written summary
Narrower rows gave some weed control.
- Taxon
- FlaxLinum usitatissimumt0
- Treatment
- narrower row spacinge0
- Outcome
- weed controle0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“some degree of weed control was achieved with narrower row spacing.”
t0“Flax”
Claim · model-written summary
Treatments did not affect flaxseed oil content.
Not reportedComparatorDirection
Verbatim
e0“Oil content of flaxseed was not affected by treatments”
Claim · model-written summary
Wider spacing slightly increased iodine number in 1966.
- Taxon
- FlaxLinum usitatissimumt0
- Treatment
- wider spacing (30 cm)e0
- Outcome
- iodine numbere0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“iodine number was slightly higher for the wider spacing (30 cm) in 1966.”
t0“Flax”
Claim · model-written summary
Row spacing did not affect total water use.
- Taxon
- FlaxLinum usitatissimumt0
- Treatment
- row spacinge0
- Outcome
- Total water usee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total water use was not affected by row spacing or weed treatment”
t0“Flax”
Claim · model-written summary
Weed treatment did not affect total water use.
- Taxon
- FlaxLinum usitatissimumt0
- Treatment
- weed treatmente0
- Outcome
- Total water usee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total water use was not affected by row spacing or weed treatment”
t0“Flax”
Claim · model-written summary
Narrow spacing increased water use efficiency.
- Taxon
- FlaxLinum usitatissimumt0
- Treatment
- narrow row spacinge0
- Outcome
- water use efficiencye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water use efficiency was increased by narrow row spacing and by weed control.”
t0“Flax”
Claim · model-written summary
Weed control increased water use efficiency.
- Taxon
- FlaxLinum usitatissimumt0
- Treatment
- weed controle0
- Outcome
- water use efficiencye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water use efficiency was increased by narrow row spacing and by weed control.”
t0“Flax”
Claim · model-written summary
Water use patterns suggested deeper roots in the drier year.
- Taxon
- FlaxLinum usitatissimumt0
- Outcome
- deeper root penetratione0
- Qualifier
- during the drier yeare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water use patterns indicated deeper root penetration during the drier year.”
t0“Flax”
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- negative
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- no effect
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See all 45 papers →density · weed · Linum usitatissimum (flax)Results agree
1 paper in the same direction as this paper
- positive
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.