Abstract
Abstract Subsoiling not only improves root penetration and water infiltration but may also provide an efficient means of applying N fertilizer. Field studies were conducted 2 yr on a Norfolk sandy loam (fineloamy, siliceous, thermic Typic Paleudults) and 1 yr on a Dothan fine‐sandy loam (fine‐loamy, siliceous, thermic Plinthic Paleudults) to determine the effect of N source and application method, subsoiling placement, and time of subsoiling and N application on the efficiency of N applied to no‐till corn ( Zea mays L.). Urea and NH 4 N0 3 (157 kg ha− 1 ) were applied (i) surface‐banded at planting, (ii) in the in‐row subsoil track at planting, (iii) surface‐banded 5 weeks after planting, or (iv) interrow with subsoilers 5 weeks after planting. Nitrification inhibitors, dicyandiamide (cyanoguanidine) (DCD) and ethylene dibromide (1‐2‐dibromoethane) (EDB), were also used with urea applied in subsoil tracks. Neither inhibitor affected grain yields. Applying N in the subsoil track proved an effective application method. Generally, highest yields (8204 to 9486 kg ha− 1 ) were obtained by applying N 5 weeks after planting with in‐row subsoiling. Results indicate no benefit to subsoiling interrow if in‐row subsoiling was done at planting; however, if corn was planted without in‐row subsoiling, subsoiling interrow 5 weeks later improved yields. Interrow subsoiling may be a practical alternate management tool, especially when used to apply sidedressed N, for growers in years when subsoiling at planting is not feasible.
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Claims 6
Claim · model-written summary
Neither nitrification inhibitor affected grain yields.
- Taxon
- Corn
Zea mays subsp. mayst0 - Treatment
- inhibitore0
- Outcome
- grain yieldse0
- Direction
- affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Neither inhibitor affected grain yields”
t0“Corn”
Claim · model-written summary
Applying nitrogen in the subsoil track was effective.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- Applying N in the subsoil tracke0
- Outcome
- effective application methode0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applying N in the subsoil track proved an effective application method”
t0“Corn”
Claim · model-written summary
Nitrogen at five weeks with in-row subsoiling generally gave the highest yields of 8204 to 9486 kg ha− 1.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- applying N 5 weeks after planting with in‐row subsoilinge0
- Outcome
- yieldse0
- Direction
- higheste0
- Value
- 8204 to 9486 kg ha− 1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Generally, highest yields (8204 to 9486 kg ha− 1 ) were obtained by applying N 5 weeks after planting with in‐row subsoiling”
t0“Corn”
Claim · model-written summary
Interrow subsoiling added no benefit after in-row subsoiling at planting.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- subsoiling interrowe0
- Outcome
- benefite0
- Direction
- no benefite0
- Comparator
- in‐row subsoiling was done at plantinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no benefit to subsoiling interrow if in‐row subsoiling was done at planting”
t0“Corn”
Claim · model-written summary
Interrow subsoiling five weeks later improved yields without in-row subsoiling at planting.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- subsoiling interrow 5 weeks latere0
- Outcome
- yieldse0
- Direction
- improvede0
- Comparator
- without in‐row subsoilinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“if corn was planted without in‐row subsoiling, subsoiling interrow 5 weeks later improved yields”
t0“Corn”
Claim · model-written summary
Interrow subsoiling may be a practical alternate when subsoiling at planting is infeasible.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- Interrow subsoilinge0
- Qualifier
- when subsoiling at planting is not feasiblee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Interrow subsoiling may be a practical alternate management tool, especially when used to apply sidedressed N, for growers in years when subsoiling at planting is not feasible”
t0“Corn”
The same questions in other 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
- positive
- no effect
- negative
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.