Abstract
Management of corn (Zea mays) row spacings and populations has been used for many years to increase corn productivity. In 1998 and 1999, nonirrigated corn was grown in 38-, 56-, and 76-cm row spacings at populations averaging 59,300, 72,900, and 83,900 plants/ha in Michigan. Glufosinate at 0.29 kg/ha was applied to common lambsquarters (Chenopodium album L.) averaging 5 cm in height in each plot. Corn population and row spacing did not influence weed emergence following application of glufosinate. Common lambsquarters biomass and seed production were reduced when grown under canopies of corn planted in populations exceeding 72,900 plants/ha. Common lambsquarters biomass was reduced as corn row spacings were reduced from 76 to 38 cm. Early-season interception of photosynthetic active radiation (PAR) by corn canopies increased as row spacings decreased, but differences were not apparent later in the season. Interception of PAR was similar throughout the season when corn populations exceeded 72,900 plants/ha. Corn yields were not affected by row spacing, but they were increased with corn populations of 72,900 plants/ha or higher.Nomenclature: Glufosinate; common lambsquarters, Chenopodium album L,. #3 CHEAL; corn, Zea mays L. ‘DK 493GR’.Additional index words: Crop density, herbicide-tolerant crops, narrow-row corn.Abbreviation: PAR, photosynthetic active radiation.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 9
Claim · model-written summary
Corn population and row spacing did not influence post-glufosinate weed emergence.
- Taxon
- Corn
Zea mays subsp. mayse0 - Treatment
- Corn population and row spacinge0
- Interactor
- Common Lambsquarters
Chenopodium albumt0weed - Outcome
- weed emergencee0
- Direction
- did not influencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn population and row spacing did not influence weed emergence following application of glufosinate”
t0“Common Lambsquarters”
Claim · model-written summary
Corn populations above 72,900 plants/ha reduced lambsquarters biomass.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- populations exceeding 72,900 plants/hae0
- Interactor
- Common lambsquartersChenopodium albume0weed
- Outcome
- Common lambsquarters biomasse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Common lambsquarters biomass and seed production were reduced when grown under canopies of corn planted in populations exceeding 72,900 plants/ha”
Claim · model-written summary
Corn populations above 72,900 plants/ha reduced lambsquarters seed production.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- populations exceeding 72,900 plants/hae0
- Interactor
- Common lambsquartersChenopodium albume0weed
- Outcome
- seed productione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Common lambsquarters biomass and seed production were reduced when grown under canopies of corn planted in populations exceeding 72,900 plants/ha”
Claim · model-written summary
Narrowing corn rows from 76 to 38 cm reduced lambsquarters biomass.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- 38 cme0
- Interactor
- Common lambsquartersChenopodium albume0weed
- Outcome
- Common lambsquarters biomasse0
- Direction
- reducede0
- Comparator
- 76e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Common lambsquarters biomass was reduced as corn row spacings were reduced from 76 to 38 cm”
Claim · model-written summary
Narrower corn rows increased early-season PAR interception.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- row spacings decreasede0
- Outcome
- interception of photosynthetic active radiation (PAR)e0
- Direction
- increasede0
- Qualifier
- Early-seasone0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Early-season interception of photosynthetic active radiation (PAR) by corn canopies increased as row spacings decreased”
Claim · model-written summary
Later-season PAR interception differences by row spacing were not apparent.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- row spacingse1
- Outcome
- differencese0
- Direction
- not apparente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“differences were not apparent later in the season”
e1“as row spacings decreased”
t0“Corn Yield”
Claim · model-written summary
PAR interception was similar through the season above 72,900 corn plants/ha.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- corn populations exceeded 72,900 plants/hae0
- Outcome
- Interception of PARe0
- Direction
- similare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Interception of PAR was similar throughout the season when corn populations exceeded 72,900 plants/ha”
Claim · model-written summary
Corn yield was unaffected by row spacing.
- Taxon
- CornZea mays subsp. mayse0
- Treatment
- row spacinge0
- Outcome
- Corn yieldse0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn yields were not affected by row spacing”
Claim · model-written summary
Corn yields increased at populations of at least 72,900 plants/ha.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- corn populations of 72,900 plants/ha or highere0
- Outcome
- Corn yieldse1
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“they were increased with corn populations of 72,900 plants/ha or higher”
e1“Corn yields were not affected by row spacing”
t0“Corn Yield”
The same questions in other papers
Zea mays subsp. mays · yield · Zea mays (maize)Results differ
195 papers in the same direction as this paper · 85 in the opposite direction · 11 reporting no difference from an alternative
- no effect
- no effect
- negative
288 papers more in this group
See all 292 papers →Zea mays subsp. mays · Chenopodium album · Zea mays (maize)Positive and negative results
1 paper in the same direction as this paper · 4 in the opposite direction
- positive
- positive
- positive
2 papers more in this group
See all 6 papers →density · yield · Zea mays (maize)Positive and negative results
138 papers in the same direction as this paper · 519 in the opposite direction
- positive
- positive
- positive
654 papers more in this group
See all 658 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.