Abstract
This research was conducted to evaluate the effects of corn ( Zea mays L.) seed size/shape on field performance of commercially available corn hybrids under conventional tillage (CT) and no‐tillage (NT). Field studies were conducted in 1987 and 1988 under the two tillage systems with small‐round, small‐flat, large‐round, and large‐flat seed of hybrids LH74xLH51 and A632xLH39, on Piano silt loam (fine, mixed, mesic Typic Argiudoll) soil at Arlington and Janes‐ville, WI. At Arlington, there were also early (mid‐ to late‐April) and late (mid‐ to late‐May) planting dates. Under such stressful conditions as early planting, NT, and soil crusting during emergence, small‐round seed often was 5 to 15% lower in emergence than small‐flat and large‐round seed. Emergence rate, vegetative dry weight, silk date, grain yield (at similar stands accomplished by overplanting and thinning), and other growth parameters measured were not influenced consistently by seed size/shape. No‐tillage and early planting resulted in cold soil at planting, which delayed emergence, early growth, and silking and often reduced grain yield compared with CT, but tillage system by seed size/shape interactions were not important for these factors. These results indicate that corn producers should focus on genetic potential, seed quality, and seed price rather than specific seed sizes/shapes when selecting hybrids, except when planting under stressful conditions. With very early planting or NT, it may be advisable to avoid small‐round seed, or to increase seeding rate by 10 to 15% with this seed size/shape in order to obtain the desired stand.
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Claims 7
Claim · model-written summary
Under stressful conditions, small-round corn seed had 5 to 15% lower emergence than small-flat and large-round seed.
- Taxon
- corn
Zea mays subsp. mayse0 - Treatment
- small‐round seede1
- Outcome
- emergencee1
- Direction
- lowere1
- Value
- 5 to 15%e1
- Qualifier
- stressful conditionse1
- Comparator
- small‐flat and large‐round seede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effects of corn ( Zea mays L.) seed size/shape”
e1“Under such stressful conditions as early planting, NT, and soil crusting during emergence, small‐round seed often was 5 to 15% lower in emergence than small‐flat and large‐round seed”
Claim · model-written summary
Emergence rate, vegetative dry weight, silk date and grain yield were not influenced consistently by seed size/shape.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- seed size/shapee2
- Outcome
- Emergence rate, vegetative dry weight, silk date, grain yielde2
- Direction
- not influenced consistentlye2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effects of corn ( Zea mays L.) seed size/shape”
e2“Emergence rate, vegetative dry weight, silk date, grain yield (at similar stands accomplished by overplanting and thinning), and other growth parameters measured were not influenced consistently by seed size/shape”
Claim · model-written summary
No-tillage with early planting reduced corn grain yield compared with conventional tillage.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- No‐tillage and early plantinge3
- Outcome
- grain yielde3
- Direction
- reducede3
- Comparator
- CTe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effects of corn ( Zea mays L.) seed size/shape”
e3“No‐tillage and early planting resulted in cold soil at planting, which delayed emergence, early growth, and silking and often reduced grain yield compared with CT”
Claim · model-written summary
No-tillage with early planting delayed corn emergence, early growth and silking compared with conventional tillage.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- No‐tillage and early plantinge3
- Outcome
- emergence, early growth, and silkinge3
- Direction
- delayede3
- Comparator
- CTe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effects of corn ( Zea mays L.) seed size/shape”
e3“No‐tillage and early planting resulted in cold soil at planting, which delayed emergence, early growth, and silking and often reduced grain yield compared with CT”
Claim · model-written summary
The tillage system by seed size/shape interaction was not important for emergence, growth and yield.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- tillage systeme4
- Outcome
- tillage system by seed size/shape interactionse4
- Direction
- not importante4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effects of corn ( Zea mays L.) seed size/shape”
e4“tillage system by seed size/shape interactions were not important for these factors”
Claim · model-written summary
Corn producers should focus on genetic potential, seed quality and seed price rather than seed size/shape when selecting hybrids.
- Taxon
- cornZea mays subsp. mayse0
- Outcome
- focus on genetic potential, seed quality, and seed pricee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effects of corn ( Zea mays L.) seed size/shape”
e5“corn producers should focus on genetic potential, seed quality, and seed price rather than specific seed sizes/shapes when selecting hybrids”
Claim · model-written summary
Under very early planting or no-tillage, increasing seeding rate by 10 to 15% is advisable with small-round seed.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- small‐round seede6
- Outcome
- increase seeding ratee6
- Value
- 10 to 15%e6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effects of corn ( Zea mays L.) seed size/shape”
e6“it may be advisable to avoid small‐round seed, or to increase seeding rate by 10 to 15% with this seed size/shape in order to obtain the desired stand”
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