Abstract
Results from a series of related field trials confirm that Western Australian crop varieties do not increase screenings with increased seeding rates contrary to the general belief held by farmers. This has management implications for weed control as increasing the crop density can substantially reduce weed growth and seed production in the absence of in-crop herbicides. In one trial, seeding rates of up to 400 kg ha of 4 cereals (oats, barley, wheat and triticale) were investigated as a management tool to control annual ryegrass and wild radish. All 4 cereals were successful in reducing weed seed production to manageable levels at high seeding rates. The yields of both wheat and triticale decreased when seeding rates increased, due to the extremely dry finish to the season in 1998, but only triticale increased screenings. The earlier maturing oats and barley were unaffected. Other trials investigating seeding rates and/or seeding pattern and row spacing with different varieties of wheat have corroborated the uniformity of screenings with seeding density.
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Claims 9
Claim · model-written summary
Western Australian crop varieties did not show increased screenings with increased seeding rates.
- Taxon
- crop varietiese0
- Treatment
- increased seeding ratese0
- Outcome
- screeningse0
- Direction
- do not increasee0
- Setting
- Western Australiane0
Not reportedComparator
Verbatim
e0“Western Australian crop varieties do not increase screenings with increased seeding rates”
Claim · model-written summary
High seeding rates reduced weed seed production to manageable levels in all four cereals (oats, barley, wheat, triticale).
Not reportedComparator
Verbatim
e0“All 4 cereals were successful in reducing weed seed production to manageable levels at high seeding rates”
Claim · model-written summary
Increasing crop density can substantially reduce weed growth and weed seed production in the absence of in-crop herbicides.
- Taxon
- crope0
- Treatment
- increasing the crop densitye0
- Outcome
- weed growth and seed productione0
- Direction
- reducee0
- Qualifier
- in the absence of in-crop herbicidese0
Not reportedComparator
Verbatim
e0“increasing the crop density can substantially reduce weed growth and seed production in the absence of in-crop herbicides”
Claim · model-written summary
Wheat yield decreased when seeding rates increased, attributed to the extremely dry finish to the 1998 season.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- seeding rates increasede0
- Outcome
- yieldse0
- Direction
- decreasede0
- Qualifier
- extremely dry finish to the season in 1998e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yields of both wheat and triticale decreased when seeding rates increased, due to the extremely dry finish to the season in 1998”
Claim · model-written summary
Triticale yield decreased when seeding rates increased, attributed to the extremely dry finish to the 1998 season.
- Taxon
- triticale
×Triticosecalee0 - Treatment
- seeding rates increasede0
- Outcome
- yieldse0
- Direction
- decreasede0
- Qualifier
- extremely dry finish to the season in 1998e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yields of both wheat and triticale decreased when seeding rates increased, due to the extremely dry finish to the season in 1998”
Claim · model-written summary
Only triticale, and not the other cereals, showed increased screenings.
- Taxon
- triticale×Triticosecalee0
- Outcome
- screeningse0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but only triticale increased screenings”
Claim · model-written summary
Oats were unaffected with respect to screenings.
- Taxon
- oats
Avena sativae0 - Outcome
- unaffectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The earlier maturing oats and barley were unaffected”
Claim · model-written summary
Barley was unaffected with respect to screenings.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaree0 - Outcome
- unaffectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“The earlier maturing oats and barley were unaffected”
Claim · model-written summary
Other trials with different wheat varieties, seeding rates, seeding patterns and row spacings corroborated the uniformity of screenings across seeding density.
- Taxon
- wheatTriticum aestivume0
- Outcome
- uniformity of screeningse0
- Qualifier
- seeding pattern and row spacinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Other trials investigating seeding rates and/or seeding pattern and row spacing with different varieties of wheat have corroborated the uniformity of screenings with seeding density”
The same questions in other papers
density · yield · x Triticosecale (triticale)Positive and negative results
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See all 498 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.