Abstract
Abstract Cropping systems for minimum or no tillage have been developed to produce corn ( Zea mays L .) yields equal to or higher than yields obtained in conventional tillage systems, but limited research has been conducted with tillage systems involving corn and soybean [ Glycine mar (L.) Merr .] rotations. The objective of this study was to compare different cropping sequences of corn, soybean, and wheat ( Triticum aestivum L .) in conventional, strip, and no tillage. A field experiment was conducted on a Hartsell fine sandy loam (fine‐loamy, siliceous, thermic Typic Hapludults). In 1981, corn yields with no tillage were 30% lower than those from conventional tillage systems. No corn yield differences were observed in 1982 and 1984 due to tillage or crop rotation; however, in 1983, strip and no tillage in conjunction with soybean in the rotation increased corn grain yields by 12%. Soybean yields in strip and no tillage decreased 16% compared to conventional tillage yields in 1981, but in subsequent years, soybean yields increased with those systems. A significant tillage × rotation interaction in 1981, 1982, and 1983 was caused primarily by a buildup of soybean cyst nematode ( Heterodera glycines Ichinohe) (SCN) population with conventional tillage and continuous soybean. Rainfall affected soybean yields more with conventional tillage than with strip or no tillage. The conservation tillage systems (strip or no‐tillage system) in combination with corn‐soybean rotation for both full‐season or double‐cropped soybean gave the most consistent yield increase for the 4 yr.
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Claims 8
Claim · model-written summary
In 1981 no-tillage corn yield was 30% below conventional tillage.
- Taxon
- corn
Zea mays subsp. mayse0 - Treatment
- no tillagee0
- Outcome
- corn yieldse0
- Direction
- lowere0
- Value
- 30%e0
- Qualifier
- In 1981e0
- Comparator
- conventional tillage systemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 1981, corn yields with no tillage were 30% lower than those from conventional tillage systems.”
Claim · model-written summary
Corn yields did not differ by tillage or rotation in 1982 and 1984.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- tillage or crop rotatione0
- Outcome
- corn yield differencese0
- Direction
- Noe0
- Qualifier
- 1982 and 1984e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No corn yield differences were observed in 1982 and 1984 due to tillage or crop rotation”
Claim · model-written summary
In 1983 strip or no tillage with soybean rotation raised corn grain yield by 12%.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- strip and no tillage in conjunction with soybean in the rotatione0
- Outcome
- corn grain yieldse0
- Direction
- increasede0
- Value
- 12%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in 1983, strip and no tillage in conjunction with soybean in the rotation increased corn grain yields by 12%.”
Claim · model-written summary
Strip and no tillage reduced soybean yield by 16% in 1981 relative to conventional tillage.
- Taxon
- Soybean
Glycine maxe0 - Treatment
- strip and no tillagee0
- Outcome
- Soybean yieldse0
- Direction
- decreasede0
- Value
- 16%e0
- Qualifier
- 1981e0
- Comparator
- conventional tillagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean yields in strip and no tillage decreased 16% compared to conventional tillage yields in 1981”
Claim · model-written summary
In later years soybean yields increased under strip and no tillage.
- Taxon
- soybeanGlycine maxe0
- Treatment
- those systemse0
- Outcome
- soybean yieldse0
- Direction
- increasede0
- Qualifier
- subsequent yearse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in subsequent years, soybean yields increased with those systems.”
Claim · model-written summary
A significant tillage-by-rotation interaction arose mainly from soybean cyst nematode buildup under conventional tillage and continuous soybean.
- Taxon
- soybeanGlycine maxe0
- Treatment
- conventional tillage and continuous soybeane0
- Interactor
- Heterodera glycines Ichinohe
Heterodera glycinese0pest - Outcome
- buildup of soybean cyst nematode ( Heterodera glycines Ichinohe) (SCN) populatione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A significant tillage × rotation interaction in 1981, 1982, and 1983 was caused primarily by a buildup of soybean cyst nematode ( Heterodera glycines Ichinohe) (SCN) population with conventional tillage and continuous soybean.”
Claim · model-written summary
Rainfall influenced soybean yields more under conventional tillage than conservation tillage.
- Taxon
- soybeanGlycine maxe0
- Treatment
- Rainfalle0
- Outcome
- soybean yieldse0
- Direction
- moree0
- Comparator
- strip or no tillagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rainfall affected soybean yields more with conventional tillage than with strip or no tillage.”
Claim · model-written summary
Conservation tillage with corn-soybean rotation gave the most consistent yield increase over four years.
- Taxon
- soybeanGlycine maxe0
- Treatment
- conservation tillage systems (strip or no‐tillage system) in combination with corn‐soybean rotatione0
- Outcome
- yield increasee0
- Direction
- increasee0
- Value
- 4 yre0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The conservation tillage systems (strip or no‐tillage system) in combination with corn‐soybean rotation for both full‐season or double‐cropped soybean gave the most consistent yield increase for the 4 yr.”
The same questions in other papers
Glycine max · yield · Zea mays (maize)Positive and negative results
154 papers in the same direction as this paper · 18 in the opposite direction · 7 reporting no difference from an alternative
- positive
- positive
- positive
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See all 180 papers →rotation · yield · Glycine max (soybean)Positive and negative results
106 papers in the same direction as this paper · 30 in the opposite direction · 7 reporting no difference from an alternative
- negative
- negative
- negative
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253 papers in the same direction as this paper · 52 in the opposite direction · 16 reporting no difference from an alternative
- negative
- negative
- no effect
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See all 322 papers →tillage · yield · Glycine max (soybean)Positive and negative results
263 papers in the same direction as this paper · 100 in the opposite direction · 26 reporting no difference from an alternative
- no effect
- no effect
- no effect
386 papers more in this group
See all 390 papers →tillage · yield · Zea mays (maize)Positive and negative results
811 papers in the same direction as this paper · 230 in the opposite direction · 57 reporting no difference from an alternative
- negative
- no effect
- no effect
1,095 papers more in this group
See all 1,099 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.