Abstract
Abstract The effects of conservation‐tillage practices on the root environment of corn ( Zea mays L.) may differ with varying amounts of irrigation. Dryland, 50% irrigation, and 100% irrigation treatments were applied in combination with disc, no‐tillage, and a postemergence chisel treatment designed to allow rapid infiltration of irrigation water. The study was conducted during the 1980 growing season at the Nebraska Agricultural Experiment Station near Mead, NE, on a Sharpsburg silty clay loam (fine, montmorillonitic, mesic Typic Argiudolls). Root samples were taken to 1.50 m in 0.15‐m increments. Sampling was done at 60 (V8), 77 (V14), and 90 (R2) days after planting. Root length per soil volume as a function of depth from the soil surface was characterized using hybrid B73 × Mo17. Root length exhibited linear and often quadratic distribution over sampling depths at all sampling dates. The 100% irrigation treatment exhibited greatest total profile (0‐ to 1.5‐m) and surface (0‐ to 0.15‐m) root length at R2. Dryland and 50% irrigation treatments were associated with relatively greater root length proliferation deep in the soil profile. Differences in root length distribution were not as pronounced at stages V8 and V14. Chisel and no‐tillage treatments, with crop residues at the soil surface, resulted in greater surface (0‐ to 0.15‐m) and total profile root length than discing. Corn roots tended to explore the lower profile to a greater extent under water stress conditions. This phenomenon, in conjunction with soil water conservation by no‐tillage methods, may allow irrigators to increase water‐use efficiency by better use of stored soil moisture.
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Claims 8
Claim · model-written summary
Root length followed linear and often quadratic depth distributions at each sampling date.
- Taxon
- Corn
Zea mays subsp. mayst0 - Outcome
- Root length exhibited linear and often quadratic distribution over sampling depthse0
- Qualifier
- at all sampling datese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root length exhibited linear and often quadratic distribution over sampling depths at all sampling dates”
t0“Conservation Tillage and Irrigation Effects on Corn Root Development1”
Claim · model-written summary
Full irrigation produced greatest total-profile and surface root length at R2.
- Taxon
- CornZea mays subsp. mayst0
- Organ / stage
- R2e0
- Treatment
- 100% irrigation treatmente0
- Outcome
- total profile (0‐ to 1.5‐m) and surface (0‐ to 0.15‐m) root lengthe0
- Direction
- greateste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 100% irrigation treatment exhibited greatest total profile (0‐ to 1.5‐m) and surface (0‐ to 0.15‐m) root length at R2”
t0“Conservation Tillage and Irrigation Effects on Corn Root Development1”
Claim · model-written summary
Dryland irrigation was associated with more deep root proliferation.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- Drylande0
- Outcome
- root length proliferation deep in the soil profilee0
- Direction
- greatere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dryland and 50% irrigation treatments were associated with relatively greater root length proliferation deep in the soil profile”
t0“Conservation Tillage and Irrigation Effects on Corn Root Development1”
Claim · model-written summary
50% irrigation was associated with more deep root proliferation.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- 50% irrigation treatmentse0
- Outcome
- root length proliferation deep in the soil profilee0
- Direction
- greatere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dryland and 50% irrigation treatments were associated with relatively greater root length proliferation deep in the soil profile”
t0“Conservation Tillage and Irrigation Effects on Corn Root Development1”
Claim · model-written summary
Root distribution differences were weaker at V8 and V14.
- Taxon
- CornZea mays subsp. mayst0
- Organ / stage
- V8 and V14e0
- Outcome
- Differences in root length distributione0
- Direction
- not as pronouncede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Differences in root length distribution were not as pronounced at stages V8 and V14”
t0“Conservation Tillage and Irrigation Effects on Corn Root Development1”
Claim · model-written summary
Chisel tillage produced greater surface and total root length than discing.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- Chisele0
- Outcome
- surface (0‐ to 0.15‐m) and total profile root lengthe0
- Direction
- greatere0
- Comparator
- discinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chisel and no‐tillage treatments, with crop residues at the soil surface, resulted in greater surface (0‐ to 0.15‐m) and total profile root length than discing”
t0“Conservation Tillage and Irrigation Effects on Corn Root Development1”
Claim · model-written summary
No-tillage produced greater surface and total root length than discing.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- no‐tillage treatmentse0
- Outcome
- surface (0‐ to 0.15‐m) and total profile root lengthe0
- Direction
- greatere0
- Comparator
- discinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chisel and no‐tillage treatments, with crop residues at the soil surface, resulted in greater surface (0‐ to 0.15‐m) and total profile root length than discing”
t0“Conservation Tillage and Irrigation Effects on Corn Root Development1”
Claim · model-written summary
Roots explored the lower soil profile more under water stress.
- Taxon
- CornZea mays subsp. mayse0
- Treatment
- water stress conditionse0
- Outcome
- explore the lower profilee0
- Direction
- greatere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn roots tended to explore the lower profile to a greater extent under water stress conditions”
t0“Conservation Tillage and Irrigation Effects on Corn Root Development1”
The same questions in other papers
tillage · growth · Zea mays (maize)Positive and negative results
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- negative
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See all 283 papers →irrigation · growth · Zea mays (maize)Positive and negative results
207 papers in the same direction as this paper · 80 in the opposite direction · 1 reporting no difference from an alternative
- positive
- negative
- no effect
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See all 289 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.