Abstract
Although continuous no‐till (NT) cropping systems are appropriate on highly erodible land, concern among producers about potential yield reductions has limited NT adoption in the northern Corn Belt, especially on poorly drained soils. The objectives of this 4‐yr study were to quantify the effects of rotational full‐width tillage compared with long‐term NT and zone‐tillage (ZT) systems with and without in‐season row cultivation (RC) on corn ( Zea mays L.) and soybean [ Glycine max (L.) Merr.] yield and economic return. The study was conducted on a tile‐drained Nicollet–Webster clay loam soil complex. Sixteen of the 18 treatments comprised a factorial arrangement of three factors: (i) tillage for corn following soybean [NT, 38‐cm deep fall ZT, 20‐cm deep fall strip‐tillage (ST), or spring field cultivate (SFC)], (ii) tillage for soybean following corn [NT or fall chisel plow (CP) plus SFC], and (iii) in‐season RC for corn (with or without). Four‐year average corn grain yields were greater for ST and ZT (10.1 Mg ha −1 ) compared with SFC (9.7 Mg ha −1 ) and NT (9.6 Mg ha −1 ) tillage for corn. No‐tillage for the previous year's soybean crop reduced corn yields in two of 4 yr compared with full width (CP+SFC) tillage. Moreover, when full‐width tillage for soybean was rotated with ZT or ST for corn, these treatments produced greater corn yields and economic returns than annual full‐width tillage systems. Soybean yields were maximized by rotational tillage; however, the small differences in yields found among the tillage systems did not result in an economic return to full‐width tillage practices. When both corn and soybean production was considered, rotational tillage practices were likely to maximize yields but not economic return.
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Claims 9
Claim · model-written summary
Corn grain yield averaged 10.1 Mg ha −1 with strip tillage, exceeding spring cultivation and no tillage.
- Taxon
- corn
Zea mays subsp. mayse0 - Treatment
- STe0
- Outcome
- corn grain yieldse0
- Direction
- greatere0
- Value
- 10.1 Mg ha −1e0
- Comparator
- SFCe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Four‐year average corn grain yields were greater for ST and ZT (10.1 Mg ha −1 ) compared with SFC (9.7 Mg ha −1 ) and NT (9.6 Mg ha −1 ) tillage for corn”
Claim · model-written summary
Corn grain yield averaged 10.1 Mg ha −1 with zone tillage, exceeding spring cultivation and no tillage.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- ZTe0
- Outcome
- corn grain yieldse0
- Direction
- greatere0
- Value
- 10.1 Mg ha −1e0
- Comparator
- NTe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Four‐year average corn grain yields were greater for ST and ZT (10.1 Mg ha −1 ) compared with SFC (9.7 Mg ha −1 ) and NT (9.6 Mg ha −1 ) tillage for corn”
Claim · model-written summary
No tillage for preceding soybean reduced corn yield in two of four years versus full-width tillage.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- No‐tillagee0
- Outcome
- corn yieldse0
- Direction
- reducede0
- Qualifier
- two of 4 yre0
- Comparator
- full width (CP+SFC) tillagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No‐tillage for the previous year's soybean crop reduced corn yields in two of 4 yr compared with full width (CP+SFC) tillage”
Claim · model-written summary
Rotating full-width soybean tillage with corn zone or strip tillage raised corn yields versus annual full-width tillage.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- full‐width tillage for soybean was rotated with ZT or ST for corne0
- Outcome
- corn yieldse0
- Direction
- greatere0
- Comparator
- annual full‐width tillage systemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when full‐width tillage for soybean was rotated with ZT or ST for corn, these treatments produced greater corn yields and economic returns than annual full‐width tillage systems”
Claim · model-written summary
The same rotational treatments raised economic returns versus annual full-width tillage.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- full‐width tillage for soybean was rotated with ZT or ST for corne0
- Outcome
- economic returnse0
- Direction
- greatere0
- Comparator
- annual full‐width tillage systemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when full‐width tillage for soybean was rotated with ZT or ST for corn, these treatments produced greater corn yields and economic returns than annual full‐width tillage systems”
Claim · model-written summary
Rotational tillage maximized soybean yields.
- Taxon
- Soybean
Glycine maxe0 - Treatment
- rotational tillagee0
- Outcome
- Soybean yieldse0
- Direction
- maximizede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean yields were maximized by rotational tillage”
Claim · model-written summary
Small soybean yield differences did not deliver an economic return to full-width tillage.
- Taxon
- SoybeanGlycine maxe1
- Outcome
- economic return to full‐width tillage practicese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the small differences in yields found among the tillage systems did not result in an economic return to full‐width tillage practices”
e1“Soybean yields”
Claim · model-written summary
For combined corn and soybean production, rotational tillage was judged likely to maximize yields.
- Taxon
- corn and soybeanGlycine maxZea mays subsp. mayse0
- Outcome
- rotational tillage practices were likely to maximize yieldse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When both corn and soybean production was considered, rotational tillage practices were likely to maximize yields but not economic return”
Claim · model-written summary
For combined corn and soybean production, rotational tillage was judged unlikely to maximize economic return.
- Taxon
- corn and soybeanGlycine maxZea mays subsp. mayse0
- Outcome
- not economic returne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When both corn and soybean production was considered, rotational tillage practices were likely to maximize yields but not economic return”
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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.