Abstract
Abstract Persistence of subsoil compaction in construction right‐of‐way (ROW) areas is a major cropland concern following installation of underground pipelines. Soil physical disturbance and remediation practices including removal of topsoil, subsoil tillage and replacement of topsoil were investigated in a soybean–corn rotation field, which was located within a pipeline ROW. The objectives of the study were to investigate the effectiveness of subsoil tillage (300 and 450 mm) applied shortly after the pipeline installation used to help restore soil physical properties and to recover crop yields. Soil bulk density, soil cone index and crop yields (soybean and corn) from three ROW trafficked zones (Z1, Z2 and Z3) and adjacent unaffected zones were compared at one year and two years after pipeline installation. Compared to 300 mm of subsoil tillage in the ROW zones, 450 mm of subsoil tillage did not significantly improve the soil bulk density and crop (soybean and corn) yields. Compared to 300 mm of subsoil tillage, 450 mm of subsoil tillage created significantly lower soil cone index values within the treated soil layer. Compared to yield data from the adjacent unaffected zones, the ROW zones (Z1, Z2 and Z3) had statistically significant ( p < .05) crop yield declines of 25% in soybean (2017) and 15% in corn (2018). The near‐term soil physical properties and crop yield have been improved from the subsoil tillage applied in the affected zones; however, their recovery to normal conditions as in the unaffected areas has not been achieved within the 2‐year period.
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Claims 5
Claim · model-written summary
450 mm tillage did not significantly improve crop yields over 300 mm tillage.
- Taxon
- soybean and corn
Glycine max
Zea mays subsp. mayse0 - Treatment
- 450 mm of subsoil tillagee0
- Outcome
- crop (soybean and corn) yieldse0
- Direction
- did not significantly improvee0
- Comparator
- 300 mm of subsoil tillagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to 300 mm of subsoil tillage in the ROW zones, 450 mm of subsoil tillage did not significantly improve the soil bulk density and crop (soybean and corn) yields.”
Claim · model-written summary
450 mm tillage reduced soil cone index relative to 300 mm tillage.
- Taxon
- soybean and cornGlycine maxZea mays subsp. mayse1
- Treatment
- 450 mm of subsoil tillagee0
- Outcome
- soil cone index valuese0
- Direction
- lowere0
- Comparator
- 300 mm of subsoil tillagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to 300 mm of subsoil tillage, 450 mm of subsoil tillage created significantly lower soil cone index values within the treated soil layer.”
e1“crop yields (soybean and corn)”
Claim · model-written summary
Right-of-way zones had 25% lower soybean yield in 2017 than adjacent unaffected zones.
- Taxon
- soybeanGlycine maxe0
- Outcome
- crop yielde0
- Direction
- declinese0
- Value
- 25%e0
- Qualifier
- 2017e0
- Comparator
- adjacent unaffected zonese1
- Setting
- ROW zones (Z1, Z2 and Z3)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the ROW zones (Z1, Z2 and Z3) had statistically significant ( p < .05) crop yield declines of 25% in soybean (2017) and 15% in corn (2018).”
e1“Compared to yield data from the adjacent unaffected zones”
Claim · model-written summary
Right-of-way zones had 15% lower corn yield in 2018 than adjacent unaffected zones.
- Taxon
- cornZea mays subsp. mayse0
- Outcome
- crop yielde0
- Direction
- declinese0
- Value
- 15%e0
- Qualifier
- 2018e0
- Comparator
- adjacent unaffected zonese1
- Setting
- ROW zones (Z1, Z2 and Z3)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the ROW zones (Z1, Z2 and Z3) had statistically significant ( p < .05) crop yield declines of 25% in soybean (2017) and 15% in corn (2018).”
e1“Compared to yield data from the adjacent unaffected zones”
Claim · model-written summary
Subsoil tillage improved near-term crop yield in affected zones without restoring normal conditions within two years.
- Taxon
- soybean and cornGlycine maxZea mays subsp. mayse1
- Treatment
- subsoil tillagee0
- Outcome
- crop yielde0
- Direction
- improvede0
- Qualifier
- within the 2‐year periode0
- Comparator
- unaffected arease0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The near‐term soil physical properties and crop yield have been improved from the subsoil tillage applied in the affected zones; however, their recovery to normal conditions as in the unaffected areas has not been achieved within the 2‐year period.”
e1“crop yields (soybean and corn)”
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- no effect
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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.