Abstract
Diverse cropping systems with different input levels and crop diversities can alter weed community dynamics (abundance and crop-weed competition). Organic systems believed to have greater heterogeneity in soil resources which can sustain more competition form weeds compared to conventional systems. However, direct evaluation of competitiveness among the two systems under wide range of crop diversities has not being tested. Therefore, a study was carried out within a long-term cropping systems study at Scott, Saskatchewan to compare weed dynamics. The main experiment consists of three input levels; high, reduced, and organic and three diversity levels; low, diversified annuals, diversified annual perennials. A micro-plot study was carried out within the main experiment with four weed control treatments applied in the wheat phase of reduced and organic systems. The treatments were 1.weed free treatment, 2. weedy treatment, 3. standard weed control and 4. pseudo weed established at 1:1 ratio with the crop. Within organic crop rotations weed density was high in diversified annual perennial system while in reduced systems it was high in diversified annual grain rotations. Overall, diversified annual perennial system had low weed biomass compared to low diversity rotation. There was no difference in weed biomass between organic and reduced systems. There was no difference between organic and reduced systems for yield loss. Grain yield was greater in reduced compared to organic systems. Even under weed-free conditions grain yield was low in organic systems indicating weeds are not the major yield limiting factor in Saskatchewan organic cropping systems.
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Claims 8
Claim · model-written summary
In organic crop rotations, weed density was high in the diversified annual perennial system.
- Taxon
- wheat
Triticum aestivume4 - Interactor
- weede1weed
- Outcome
- weed densitye1
- Qualifier
- Within organic crop rotationse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Within organic crop rotations weed density was high in diversified annual perennial system while in reduced systems it was high in diversified annual grain rotations”
e4“A micro-plot study was carried out within the main experiment with four weed control treatments applied in the wheat phase of reduced and organic systems”
Claim · model-written summary
In reduced systems, weed density was high in the diversified annual grain rotation.
- Taxon
- wheatTriticum aestivume4
- Interactor
- weede1weed
- Outcome
- weed densitye1
- Qualifier
- in reduced systemse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Within organic crop rotations weed density was high in diversified annual perennial system while in reduced systems it was high in diversified annual grain rotations”
e4“A micro-plot study was carried out within the main experiment with four weed control treatments applied in the wheat phase of reduced and organic systems”
Claim · model-written summary
The diversified annual perennial system had low weed biomass compared with the low diversity rotation.
- Taxon
- wheatTriticum aestivume4
- Treatment
- diversified annual perennial systeme2
- Interactor
- weede2weed
- Outcome
- weed biomasse2
- Direction
- lowe2
- Comparator
- low diversity rotatione2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Overall, diversified annual perennial system had low weed biomass compared to low diversity rotation”
e4“A micro-plot study was carried out within the main experiment with four weed control treatments applied in the wheat phase of reduced and organic systems”
Claim · model-written summary
Weed biomass did not differ between organic and reduced systems.
- Taxon
- wheatTriticum aestivume4
- Treatment
- organice3
- Interactor
- weede3weed
- Outcome
- weed biomasse3
- Direction
- no differencee3
- Comparator
- reduced systemse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“There was no difference in weed biomass between organic and reduced systems”
e4“A micro-plot study was carried out within the main experiment with four weed control treatments applied in the wheat phase of reduced and organic systems”
Claim · model-written summary
Yield loss did not differ between organic and reduced systems.
- Taxon
- wheatTriticum aestivume4
- Treatment
- organice5
- Outcome
- yield losse5
- Direction
- no differencee5
- Comparator
- reduced systemse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“A micro-plot study was carried out within the main experiment with four weed control treatments applied in the wheat phase of reduced and organic systems”
e5“There was no difference between organic and reduced systems for yield loss”
Claim · model-written summary
Grain yield was greater in reduced than in organic systems.
- Taxon
- wheatTriticum aestivume4
- Treatment
- reducede6
- Outcome
- Grain yielde6
- Direction
- greatere6
- Comparator
- organic systemse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“A micro-plot study was carried out within the main experiment with four weed control treatments applied in the wheat phase of reduced and organic systems”
e6“Grain yield was greater in reduced compared to organic systems”
Claim · model-written summary
Even under weed-free conditions, grain yield was low in organic systems.
- Taxon
- wheatTriticum aestivume4
- Outcome
- grain yielde7
- Qualifier
- Even under weed-free conditionse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“A micro-plot study was carried out within the main experiment with four weed control treatments applied in the wheat phase of reduced and organic systems”
e7“Even under weed-free conditions grain yield was low in organic systems indicating weeds are not the major yield limiting factor in Saskatchewan organic cropping systems”
Claim · model-written summary
Weeds are not the major yield limiting factor in Saskatchewan organic cropping systems.
- Taxon
- wheatTriticum aestivume4
- Outcome
- major yield limiting factore7
- Qualifier
- weeds are not the major yield limiting factor in Saskatchewan organic cropping systemse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“A micro-plot study was carried out within the main experiment with four weed control treatments applied in the wheat phase of reduced and organic systems”
e7“Even under weed-free conditions grain yield was low in organic systems indicating weeds are not the major yield limiting factor in Saskatchewan organic cropping systems”
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See all 116 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.