Abstract
The use of foliar or soil applied atrazine to control quackgrass ( Agropyron repens) in corn ( Zea mays ) was investigated. Atrazine treatments to control quackgrass significantly increased corn yield. Spring tillage without atrazine had little or no long term effect on quackgrass stand. A single application of 4.5 kg a.i. atrazine ha -1 applied in the fall or spring provided no better control of quackgrass than a split application of 2.25 kg a.i. atrazine ha -1 in either the foliage or bare soil experiments. Quackgrass recovery and soybean (Glycine max) yield were measured for 2 yr afterthe last atrazine application. Quackgrass did not recover to any significant extent within 2 yr after the cessation of the treatments on any of the atrazine treated plots. Atrazine residues from the previous fall applications significantly reduced soybean yield. Two years after the last atrazine treatment, soybean yields were similar, regardiess of former spring or fall atrazine application.
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Claims 6
Claim · model-written summary
Atrazine treatments significantly increased corn yield.
- Taxon
- corn
Zea mays subsp. mayse0 - Treatment
- Atrazine treatmentse0
- Interactor
- quackgrasse0weed
- Outcome
- corn yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Atrazine treatments to control quackgrass significantly increased corn yield.”
Claim · model-written summary
Spring tillage without atrazine had little or no lasting effect on quackgrass stand.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- Spring tillage without atrazinee0
- Interactor
- quackgrasse0weed
- Outcome
- quackgrass stande0
- Direction
- little or no long term effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spring tillage without atrazine had little or no long term effect on quackgrass stand.”
t0“in corn ( Zea mays )”
Claim · model-written summary
Single fall or spring atrazine application gave no better quackgrass control than split application.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- single application of 4.5 kg a.i. atrazine ha -1e0
- Interactor
- quackgrasse0weed
- Outcome
- control of quackgrasse0
- Direction
- no bettere0
- Comparator
- split application of 2.25 kg a.i. atrazine ha -1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A single application of 4.5 kg a.i. atrazine ha -1 applied in the fall or spring provided no better control of quackgrass than a split application of 2.25 kg a.i. atrazine ha -1 in either the foliage or bare soil experiments.”
t0“in corn ( Zea mays )”
Claim · model-written summary
Quackgrass did not significantly recover within two years after atrazine stopped.
- Taxon
- cornZea mays subsp. mayst0
- Interactor
- Quackgrasse0weed
- Outcome
- Quackgrass did not recovere0
- Qualifier
- within 2 yre0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Quackgrass did not recover to any significant extent within 2 yr after the cessation of the treatments on any of the atrazine treated plots.”
t0“in corn ( Zea mays )”
Claim · model-written summary
Residues from previous fall atrazine applications significantly reduced soybean yield.
- Taxon
- soybean
Glycine maxe0 - Treatment
- Atrazine residues from the previous fall applicationse0
- Outcome
- soybean yielde0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Atrazine residues from the previous fall applications significantly reduced soybean yield.”
Claim · model-written summary
Soybean yields were similar two years after the last atrazine treatment regardless of earlier timing.
- Taxon
- soybeanGlycine maxe0
- Treatment
- former spring or fall atrazine applicatione0
- Outcome
- soybean yieldse0
- Direction
- similare0
- Qualifier
- Two years after the last atrazine treatmente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two years after the last atrazine treatment, soybean yields were similar, regardiess of former spring or fall atrazine application.”
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See all 86 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.