Abstract
Corn ( Zea mays L.) producers question the relative performance of hybrids under different previous‐crop residue management systems. The objective of this study was to determine if tillage system × corn hybrid interactions were significant for corn growth parameters and grain yield for six commercial corn hybrids commonly grown in the Northern USA under conventional and no‐till systems in Wisconsin. A 2‐yr field study was conducted at River Falls, WI, on a Nickin silt loam soil (fine‐loamy over sandy or sandy‐skeletal, mixed Typic Argiudoll) in 1986 and a Whalen silt loam soil (fine‐loamy, mixed mesic Typic Hapludalfs) in 1987. Six hybrids with a range of maturities (90–115 d) were compared under conventional tillage (CT, mold‐board plowing and disking) and no‐till (NT, into a chemically killed alfalfa/grass sod) systems in a corn‐following‐alfalfa ( Medicago sativa L.)/grass sod sequence. Emergence was reduced under NT in 1986, but was greater than CT emergence in 1987. No‐till resulted in cooler soil temperatures (2.3–4.9 °F cooler), and reduced vegetative leaf number, dry weight, and plant height. Days and growing degree days (GDD) after planting to 50% silking, mature plant height, and grain moisture were increased in NT. Although hybrid differences were observed for all of the traits measured, the only tillage system × hybrid interaction detected was for mature plant height. Tillage system × hybrid × year interactions, however, occurred for days and GDD to 50% silking, final stand, grain moisture, and grain yield, especially in 1986. Differences in growing season environments between 1986 and 1987, final stand, and GDD accumulated between silking and 30 September seem to account for the tillage system × hybrid interactions observed for grain yield in 1986. Corn producers may be able to select a hybrid for an NT system which is higher yielding than under a CT system, but the results of this study suggest that the potential benefit is limited. The top four yielding hybrids under CT in this study‐were also within the group of highest yielders under NT.
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Claims 8
Claim · model-written summary
No-till reduced corn emergence in 1986 but increased it in 1987 relative to conventional tillage.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Emergence was reduced under NT in 1986, but was greater than CT emergence in 1987”
t0“Corn”
Claim · model-written summary
No-till resulted in soil temperatures 2.3–4.9 °F cooler.
- Taxon
- Corn
Zea mays subsp. mayst0 - Treatment
- No‐tille0
- Outcome
- soil temperaturese0
- Direction
- coolere0
- Value
- 2.3–4.9 °F coolere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No‐till resulted in cooler soil temperatures (2.3–4.9 °F cooler)”
t0“Corn”
Claim · model-written summary
No-till reduced vegetative leaf number, dry weight and plant height.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- No‐tille1
- Outcome
- vegetative leaf number, dry weight, and plant heighte0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reduced vegetative leaf number, dry weight, and plant height”
e1“No‐till resulted in cooler soil temperatures”
t0“Corn”
Claim · model-written summary
No-till increased time to silking, mature height and grain moisture.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- NTe0
- Outcome
- Days and growing degree days (GDD) after planting to 50% silking, mature plant height, and grain moisturee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Days and growing degree days (GDD) after planting to 50% silking, mature plant height, and grain moisture were increased in NT”
t0“Corn”
Claim · model-written summary
Hybrid differences occurred for every measured trait.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- traits measurede0
- Direction
- differencese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“hybrid differences were observed for all of the traits measured”
t0“Corn”
Claim · model-written summary
The only tillage-by-hybrid interaction was for mature plant height.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- tillage system × hybride0
- Outcome
- mature plant heighte0
- Direction
- interaction detectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the only tillage system × hybrid interaction detected was for mature plant height”
t0“Corn”
Claim · model-written summary
Tillage, hybrid and year interacted for silking timing, stand, moisture and grain yield.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- Tillage system × hybrid × yeare0
- Outcome
- days and GDD to 50% silking, final stand, grain moisture, and grain yielde0
- Direction
- interactionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tillage system × hybrid × year interactions, however, occurred for days and GDD to 50% silking, final stand, grain moisture, and grain yield”
t0“Corn”
Claim · model-written summary
The top four conventional-tillage hybrids were also among the highest yielding no-till hybrids.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- yielding hybridse0
- Direction
- highest yielderse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The top four yielding hybrids under CT in this study‐were also within the group of highest yielders under NT”
t0“Corn”
The same questions in other papers
tillage · growth · Zea mays (maize)Positive and negative results
86 papers in the same direction as this paper · 196 in the opposite direction
- positive
- negative
- negative
279 papers more in this group
See all 283 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.