Abstract
Abstract Limited research has been directed at evaluating the ability of single cover crop plantings to suppress weeds in crops beyond the initial field season. Thus, this experiment was conducted to investigate the ability of a second-year self-regenerated annual and second-year perennial cover crop planting to suppress weeds during the critical period for weed control (CPWC) in soybean crops. Whole-plot treatments included 1) conventional till, 2) no-till with cover crop residue, 3) living mulch + cover crop residue, and 4) living mulch + winter-killed residue. Subplot treatments involved weed management intensity: a) no weed management (weedy), b) weeds manually removed through the CPWC (third node soybean stage; V3), and c) weeds manually removed until soybean canopy closure (weed-free). Overall, total annual cover crop biomass during the second field season was comparable to biomass obtained from direct seeded stands during the initial field season. All cover crop treatments reduced total weed biomass through the CPWC compared to conventional till. Soybean yield was low across all treatments in this experiment. Still, yield was similar between cover crop and conventional till treatments at one site-year, however, yields were lower in all cover crop treatments at the other site-year.
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Claims 5
Claim · model-written summary
Second-season annual cover crop biomass was comparable to initial direct-seeded stands.
- Taxon
- soybean
Glycine maxt0 - Outcome
- total annual cover crop biomasse0
- Direction
- comparablee0
- Comparator
- biomass obtained from direct seeded stands during the initial field seasone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean”
e0“total annual cover crop biomass during the second field season was comparable to biomass obtained from direct seeded stands during the initial field season”
Claim · model-written summary
All cover crop treatments reduced weed biomass through the critical period compared with conventional till.
- Taxon
- soybeanGlycine maxt0
- Treatment
- All cover crop treatmentse0
- Interactor
- weede0weed
- Outcome
- total weed biomasse0
- Direction
- reducede0
- Comparator
- conventional tille0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean”
e0“All cover crop treatments reduced total weed biomass through the CPWC compared to conventional till”
Claim · model-written summary
Soybean yield was low across treatments.
- Taxon
- SoybeanGlycine maxe0
- Outcome
- Soybean yielde0
- Direction
- lowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean yield was low across all treatments in this experiment”
Claim · model-written summary
Cover crop and conventional till treatments had similar soybean yield at one site-year.
- Taxon
- soybeanGlycine maxt0
- Treatment
- cover crope0
- Outcome
- yielde0
- Direction
- similare0
- Qualifier
- at one site-yeare0
- Comparator
- conventional till treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean”
e0“yield was similar between cover crop and conventional till treatments at one site-year”
Claim · model-written summary
All cover crop treatments had lower soybean yield at the other site-year.
- Taxon
- soybeanGlycine maxt0
- Treatment
- all cover crop treatmentse0
- Outcome
- yieldse0
- Direction
- lowere0
- Qualifier
- at the other site-yeare0
- Comparator
- conventional till treatmentse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean”
e0“yields were lower in all cover crop treatments at the other site-year”
e1“yield was similar between cover crop and conventional till treatments at one site-year”
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See all 101 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.