Abstract
Corn yield ( Zea mays L.) and economic return with different tillage systems and crop rotations are highly influenced by regional soil and climate conditions. This study was conducted at seven locations in Iowa from 2003 to 2013. The experiment design was split‐plot with tillage as the main factor, which included five tillage systems (no‐tillage, NT; strip‐tillage, ST; chisel plow, CP; deep rip, DR; and moldboard plow, MP).Three crop rotations of corn–soybean ( Glycine max L.), C–S; corn–corn–soybean, C–C–S; and corn–corn, C–C were subplots in a completely randomized block design in four replications. The objectives were to: (i) investigate seasonal variability in corn yield as affected by tillage and crop rotation, (ii) identify appropriate tillage for each crop rotation and location, and (iii) evaluate the magnitude of crop rotation effect on corn yield. Corn yields varied from 2.5 to 15.8 Mg ha −1 with no detectable increase over time. The results showed northern locations have yield of 1.9 Mg ha −1 and economic return of US$329 ha −1 advantage over southern locations. Yield and economic returns for the three rotations were as follow: C–S > C–C–S > C–C. Yield and economic penalty were greater with NT than conventional tillage in the northern locations (poorly‐drained soils) than locations with well‐drained soils. The corn yield penalty associated with C–C was location specific and varied from 11 to 28%. The findings suggest a location specific adoption of tillage and crop rotation for achieving optimum yield.
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 10
Claim · model-written summary
Corn yield ranged from 2.5 to 15.8 Mg ha −1.
- Taxon
- Corn
Zea mays subsp. mayse0 - Outcome
- Corn yieldse0
- Value
- 2.5 to 15.8 Mg ha −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn yields varied from 2.5 to 15.8 Mg ha −1”
Claim · model-written summary
Corn yield had no detectable increase over time.
- Taxon
- CornZea mays subsp. mayse0
- Outcome
- Corn yieldse0
- Direction
- no detectable increasee0
- Setting
- over timee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn yields varied from 2.5 to 15.8 Mg ha −1 with no detectable increase over time”
Claim · model-written summary
Northern locations yielded 1.9 Mg ha −1 more than southern locations.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- yielde0
- Direction
- advantagee0
- Value
- 1.9 Mg ha −1e0
- Comparator
- southern locationse0
- Setting
- northern locationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“northern locations have yield of 1.9 Mg ha −1 and economic return of US$329 ha −1 advantage over southern locations”
t0“Corn”
Claim · model-written summary
Northern locations had a US$329 ha −1 economic return advantage.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- economic returne0
- Direction
- advantagee0
- Value
- US$329 ha −1e0
- Comparator
- southern locationse0
- Setting
- northern locationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“northern locations have yield of 1.9 Mg ha −1 and economic return of US$329 ha −1 advantage over southern locations”
t0“Corn”
Claim · model-written summary
Corn yield ranked C–S above C–C–S above C–C.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- C–S > C–C–S > C–Ce0
- Outcome
- Yielde0
- Direction
- C–S > C–C–S > C–Ce0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield and economic returns for the three rotations were as follow: C–S > C–C–S > C–C”
t0“Corn”
Claim · model-written summary
Economic return ranked C–S above C–C–S above C–C.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- C–S > C–C–S > C–Ce0
- Outcome
- economic returnse0
- Direction
- C–S > C–C–S > C–Ce0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield and economic returns for the three rotations were as follow: C–S > C–C–S > C–C”
t0“Corn”
Claim · model-written summary
No tillage incurred a larger yield penalty in northern poorly drained locations.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- NTe0
- Outcome
- Yielde0
- Direction
- greatere0
- Comparator
- conventional tillagee0
- Setting
- northern locationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield and economic penalty were greater with NT than conventional tillage in the northern locations (poorly‐drained soils) than locations with well‐drained soils”
t0“Corn”
Claim · model-written summary
No tillage incurred a larger economic penalty in northern poorly drained locations.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- NTe0
- Outcome
- economic penaltye0
- Direction
- greatere0
- Comparator
- conventional tillagee0
- Setting
- northern locationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield and economic penalty were greater with NT than conventional tillage in the northern locations (poorly‐drained soils) than locations with well‐drained soils”
t0“Corn”
Claim · model-written summary
Continuous corn incurred a location-specific yield penalty of 11 to 28%.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- C–Ce0
- Outcome
- corn yield penaltye0
- Direction
- penaltye0
- Value
- 11 to 28%e0
- Qualifier
- location specifice0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The corn yield penalty associated with C–C was location specific and varied from 11 to 28%”
Claim · model-written summary
The authors recommend location-specific tillage and rotation selection for optimum yield.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- location specific adoption of tillage and crop rotation for achieving optimum yielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The findings suggest a location specific adoption of tillage and crop rotation for achieving optimum yield”
t0“Corn”
The same questions in other papers
tillage · yield · Zea mays (maize)Positive and negative results
286 papers in the same direction as this paper · 812 in the opposite direction
- positive
- positive
- positive
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.