Abstract
Row spacing less than 76 cm for corn ( Zea mays L.) and soybean [ Glycine max (L.) Merr.] is becoming more common. However, little information is available on row spacing in different rotation sequences. The objective of this study was to determine the influence of rotation sequence, row spacing, and tillage system on corn and soybean yield. Corn and soybean were planted in 19‐, 38‐, and 76‐cm row spacing in conventional tillage and no‐tillage systems. Both crops were compared in seven rotation sequences. Few interactions were found between row spacing and tillage or between row spacing and rotation sequence for corn or soybean yield. Corn grain yield decreased 11% using the 19‐cm row spacing compared with the 38‐ and 76‐cm row spacings. Corn grain yield decreased 5% using the no‐tillage system compared with the conventional tillage system. Corn rotated annually with soybean and first‐year corn after 5 yr of consecutive soybean yielded 15% more than continuously grown corn. Soybean yield was not affected by row spacing. No‐tillage soybean yield was 6% higher than the conventional tillage system. First‐year soybean after 5 yr of consecutive corn yielded 8% more than the other six rotation sequences. We concluded that corn–soybean cropping history and tillage system were not important for determining optimum row‐spacing system for corn or soybean. The use of a row‐spacing system less than 76 cm was not beneficial for either crop.
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Claims 8
Claim · model-written summary
Corn grain yield with 19-cm row spacing was 11% lower than with 38- and 76-cm row spacings.
- Taxon
- corn
Zea mays subsp. mayse0 - Treatment
- 19‐cm row spacinge2
- Outcome
- Corn grain yielde2
- Direction
- decreasede2
- Value
- 11%e2
- Comparator
- 38‐ and 76‐cm row spacingse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Row spacing less than 76 cm for corn ( Zea mays L.) and soybean [ Glycine max (L.) Merr.] is becoming more common”
e2“Corn grain yield decreased 11% using the 19‐cm row spacing compared with the 38‐ and 76‐cm row spacings”
Claim · model-written summary
No-tillage corn grain yield was 5% lower than under conventional tillage.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- no‐tillage systeme3
- Outcome
- Corn grain yielde3
- Direction
- decreasede3
- Value
- 5%e3
- Comparator
- conventional tillage systeme3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Row spacing less than 76 cm for corn ( Zea mays L.) and soybean [ Glycine max (L.) Merr.] is becoming more common”
e3“Corn grain yield decreased 5% using the no‐tillage system compared with the conventional tillage system”
Claim · model-written summary
Corn rotated annually with soybean yielded 15% more than continuously grown corn.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- Corn rotated annually with soybeane4
- Outcome
- yielde4
- Direction
- moree4
- Value
- 15%e4
- Comparator
- continuously grown corne4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Row spacing less than 76 cm for corn ( Zea mays L.) and soybean [ Glycine max (L.) Merr.] is becoming more common”
e4“Corn rotated annually with soybean and first‐year corn after 5 yr of consecutive soybean yielded 15% more than continuously grown corn”
Claim · model-written summary
Soybean yield was not affected by row spacing.
- Taxon
- soybean
Glycine maxe0 - Treatment
- row spacinge5
- Outcome
- Soybean yielde5
- Direction
- not affectede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Row spacing less than 76 cm for corn ( Zea mays L.) and soybean [ Glycine max (L.) Merr.] is becoming more common”
e5“Soybean yield was not affected by row spacing”
Claim · model-written summary
No-tillage soybean yield was 6% higher than under conventional tillage.
- Taxon
- soybeanGlycine maxe6
- Treatment
- No‐tillagee6
- Outcome
- soybean yielde6
- Direction
- highere6
- Value
- 6%e6
- Comparator
- conventional tillage systeme6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“No‐tillage soybean yield was 6% higher than the conventional tillage system”
Claim · model-written summary
First-year soybean after 5 yr of consecutive corn yielded 8% more than the other six rotation sequences.
- Taxon
- soybeanGlycine maxe7
- Treatment
- First‐year soybean after 5 yr of consecutive corne7
- Outcome
- yielde7
- Direction
- moree7
- Value
- 8%e7
- Comparator
- the other six rotation sequencese7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“First‐year soybean after 5 yr of consecutive corn yielded 8% more than the other six rotation sequences”
Claim · model-written summary
Row spacing and tillage showed few interactions for corn or soybean yield.
- Taxon
- corn or soybeanGlycine maxZea mays subsp. mayse1
- Outcome
- interactionse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Few interactions were found between row spacing and tillage or between row spacing and rotation sequence for corn or soybean yield”
Claim · model-written summary
A row spacing less than 76 cm was not beneficial for corn or soybean.
- Taxon
- cornZea mays subsp. mayse0
- Outcome
- not beneficiale7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Row spacing less than 76 cm for corn ( Zea mays L.) and soybean [ Glycine max (L.) Merr.] is becoming more common”
e7“The use of a row‐spacing system less than 76 cm was not beneficial for either crop”
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