Abstract
Abstract The majority of soils in the Mississippi Delta are vertisols, whose shrink–swell behavior makes them prone to waterlogging when subjected to excessive infiltration amounts from conventional management of furrow irrigation. The goal of this investigation was to examine if corn ( Zea mays L.) grain yield and quality (test weight, kernel composition, and kernel weight) can be improved in vertisols of this region by widening furrow irrigation spacing while increasing furrow inflow rate proportionally to reduce waterlogging. A research station study at the National Center for Alluvial Aquifer Research and an on‐farm study near Glen Allan, Mississippi, were conducted from 2021 to 2023. Furrow irrigation spacing treatments in the research station study included 3.3 ft, 6.7 ft, 13.3 ft, and 26.7 ft. The on‐farm study included 10 ft, 20 ft, and “tractor track” (alternating between 10 and 30 ft furrow irrigation spacing) treatments. The three years of the research station study showed that the 26.7‐ft treatment yielded 8.5% higher than the narrower treatments at the top position of the field (50–100 ft from the topographically higher end of 500 ft furrows). Higher grain protein and kernel weight were observed halfway between two irrigated furrows of the 13.3‐ft and 26.7‐ft treatments than adjacent to irrigated furrows of any treatment. Corn grain yield in the on‐farm study was not significantly different among furrow irrigation spacing treatments. This research demonstrates that furrow irrigation spacing can be widened to at least 26.7 ft in vertisols of the Mississippi Delta without decreasing corn grain yield and quality.
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Claims 5
Claim · model-written summary
The 26.7-ft spacing yielded 8.5% more than narrower spacing at the field top.
- Taxon
- corn
Zea mays subsp. mayst0 - Treatment
- 26.7‐ft treatmente0
- Outcome
- yieldede0
- Direction
- highere0
- Value
- 8.5%e0
- Comparator
- narrower treatmentse0
- Setting
- top position of the fielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The three years of the research station study showed that the 26.7‐ft treatment yielded 8.5% higher than the narrower treatments at the top position of the field (50–100 ft from the topographically higher end of 500 ft furrows).”
t0“corn”
Claim · model-written summary
Grain protein was higher halfway between furrows for 13.3- and 26.7-ft spacing than beside irrigated furrows.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- 13.3‐ft and 26.7‐ft treatmentse0
- Outcome
- grain proteine0
- Direction
- Highere0
- Comparator
- adjacent to irrigated furrows of any treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher grain protein and kernel weight were observed halfway between two irrigated furrows of the 13.3‐ft and 26.7‐ft treatments than adjacent to irrigated furrows of any treatment.”
t0“corn”
Claim · model-written summary
Kernel weight was higher halfway between furrows for 13.3- and 26.7-ft spacing than beside irrigated furrows.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- 13.3‐ft and 26.7‐ft treatmentse0
- Outcome
- kernel weighte0
- Direction
- Highere0
- Comparator
- adjacent to irrigated furrows of any treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher grain protein and kernel weight were observed halfway between two irrigated furrows of the 13.3‐ft and 26.7‐ft treatments than adjacent to irrigated furrows of any treatment.”
t0“corn”
Claim · model-written summary
On-farm corn grain yield did not differ significantly among spacing treatments.
- Taxon
- CornZea mays subsp. mayse0
- Treatment
- furrow irrigation spacing treatmentse0
- Outcome
- grain yielde0
- Direction
- not significantly differente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn grain yield in the on‐farm study was not significantly different among furrow irrigation spacing treatments.”
Claim · model-written summary
The authors conclude that furrow spacing can reach at least 26.7 ft without reducing corn yield or quality.
- Taxon
- cornZea mays subsp. mayse0
- Outcome
- furrow irrigation spacing can be widened to at least 26.7 fte0
- Setting
- Mississippi Deltae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“furrow irrigation spacing can be widened to at least 26.7 ft in vertisols of the Mississippi Delta without decreasing corn grain yield and quality”
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