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“yield decrease”

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plus 1 earlier · 1930s

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Taxon: corn ✕

Taxon groups are the verbatim names found in the abstracts (case-insensitive), not normalised: maize, corn and Zea mays are separate groups here. The Organism view merges them through NCBI Taxonomy.

Intervention effectobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

Delaying all N to V9 did not significantly decrease corn yield.

Taxon: CornZea mays subsp. mayst0
Treatment: Delaying all the N to V9e0
Outcome: yielde0
Direction: did not significantly decreasee0

Not reportedComparator

Verbatim

t0
“Corn yield following a delayed application of nitrogen”
✓ located verbatim in the source · title, characters 0–54

e0
“Delaying all the N to V9 did not significantly decrease yield”
✓ located verbatim in the source · abstract, characters 1064–1125

Title

Corn yield following a delayed application of nitrogen

Brian H. Yoder Illinois Digital Environment for Access to Learning and Scholarship (University of Illinois at Urbana-Champaign) 2018

Other claims from this paper (13)

Intervention effect In corn following soybean, delaying the second half of N to as late as R2 did not cause significant yield loss.
Intervention effect Corn with N applied at R3 yielded 92% of the yield of corn with the second application at V3.
Intervention effect Delaying all 224 kg N ha-1 through V15 did not decrease corn yield significantly.
Intervention effect Delaying all 224 kg N ha-1 through V15 reduced corn yield with application at VT, R2 and R3 (12, 19 and 37% less).
Intervention effect In corn following corn, delaying the second half of N to R3 gave 96% of the yield of the second application at V3.
Intervention effect In corn following corn, none of the delayed N timings significantly lowered yield.
Intervention effect Delaying all N to V12 reduced corn yield by 11% relative to earlier timings.
Intervention effect Delaying all N to R3 reduced corn yield by 42%.
Recommendation Without N at planting, N must be applied by mid-vegetative stages to prevent corn yield loss.
Intervention effect When half the N was applied at planting, delaying application until past pollination caused surprisingly little corn yield loss.
Observation Split-N corn treatments recovered healthy leaf color (SPAD) no matter how late N was applied.
Intervention effect With no N at planting, corn plants could not regain full leaf color or yield if N was applied later than mid-vegetative stages.
Recommendation If all N is delayed, application should be made before plants reach mid-vegetative growth stages.

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

At Manhattan in 2008, delayed planting did not decrease yield.

Taxon: CORNZea mays subsp. mayst0
Treatment: delayed plantinge0
Outcome: yieldt1
Direction: did not decreasee0
Qualifier: in 2008e0
Setting: Manhattan, KSt1

Not reportedComparator

Verbatim

t0
“CORN”
✓ located verbatim in the source · title, characters 30–34

e0
“did not decrease at all with delayed planting in 2008”
✓ located verbatim in the source · abstract, characters 1073–1126

t1
“delayed planting dates and hybrids of varying maturity revealed that yield at Manhattan, KS”
✓ located verbatim in the source · abstract, characters 907–998

Title

EFFECT OF DELAYED PLANTING ON CORN IN CENTRAL KANSAS

Aaron James Sindelar; Kraig L. Roozeboom K-State Research Exchange (Kansas State University) 2008

Other claims from this paper (4)

Intervention effect At Manhattan in 2007, yield did not decrease significantly until the final planting date.
Intervention effect At Belleville in 2007, later planting increased yield.
Intervention effect At Belleville in 2008, planting date did not affect yield.
Intervention effect At Hutchinson, yield decreased significantly with successive planting dates; the supplied sentence is cut off.

Intervention effectobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

Delaying all 224 kg N ha-1 through V15 did not decrease corn yield significantly.

Taxon: CornZea mays subsp. mayst0
Treatment: Delaying application of all 224 kg N ha-1 through V15e0
Outcome: yielde0
Direction: did not decreasee0

Not reportedComparator

Verbatim

t0
“Corn yield following a delayed application of nitrogen”
✓ located verbatim in the source · title, characters 0–54

e0
“Delaying application of all 224 kg N ha-1 through V15 did not decrease yield significantly”
✓ located verbatim in the source · abstract, characters 695–785

Title

Corn yield following a delayed application of nitrogen

Brian H. Yoder Illinois Digital Environment for Access to Learning and Scholarship (University of Illinois at Urbana-Champaign) 2018

Other claims from this paper (13)

Intervention effect In corn following soybean, delaying the second half of N to as late as R2 did not cause significant yield loss.
Intervention effect Corn with N applied at R3 yielded 92% of the yield of corn with the second application at V3.
Intervention effect Delaying all 224 kg N ha-1 through V15 reduced corn yield with application at VT, R2 and R3 (12, 19 and 37% less).
Intervention effect In corn following corn, delaying the second half of N to R3 gave 96% of the yield of the second application at V3.
Intervention effect In corn following corn, none of the delayed N timings significantly lowered yield.
Intervention effect Delaying all N to V9 did not significantly decrease corn yield.
Intervention effect Delaying all N to V12 reduced corn yield by 11% relative to earlier timings.
Intervention effect Delaying all N to R3 reduced corn yield by 42%.
Recommendation Without N at planting, N must be applied by mid-vegetative stages to prevent corn yield loss.
Intervention effect When half the N was applied at planting, delaying application until past pollination caused surprisingly little corn yield loss.
Observation Split-N corn treatments recovered healthy leaf color (SPAD) no matter how late N was applied.
Intervention effect With no N at planting, corn plants could not regain full leaf color or yield if N was applied later than mid-vegetative stages.
Recommendation If all N is delayed, application should be made before plants reach mid-vegetative growth stages.

Intervention effectobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

Short-term conservation tillage did not significantly decrease corn yield.

Taxon: cornZea mays subsp. mayse0
Treatment: short-term implementation of conservation tillagee0
Outcome: corn yielde0
Direction: did not result in a significant decreasee0

Not reportedComparator

Verbatim

e0
“the short-term implementation of conservation tillage did not result in a significant decrease in corn yield.”
✓ located verbatim in the source · abstract, characters 1920–2029

Title

Effects of Tillage and Sowing Methods on Soil Physical Properties and Corn Plant Characters

Ying Wang; Sen Yang; Jian Sun; et al. Agriculture 2023. doi:10.3390/agriculture13030600

Other claims from this paper (9)

Intervention effect PTS lowered 10–40 cm soil penetration resistance by 11.9% to 18% versus other treatments.
Intervention effect NTS soil moisture averaged 2.7% higher than PTS.
Intervention effect NTS soil moisture averaged 1.4% higher than RTS.
Intervention effect STS lowered soil temperature by 5.6% to 8.6% during late corn growth.
Intervention effect RTS significantly reduced surface-soil bulk density.
Association High soil penetration resistance impeded early crop growth.
Association High soil penetration resistance did not impact mid-crop development.
Association Low soil temperature affected late corn growth as temperatures decreased.
Recommendation The authors regard short-term NTS sowing as feasible in Mollisol regions.

Associationobservedoriginal resultno effectmeasured

Claim · model-written summary

Increased corn yield did not decrease drainage nitrate exports.

Taxon: CornZea mays subsp. mayst0
Outcome: drainage nitrate exportse0
Direction: no_changeinferrede0
Comparator: Increased corn yieldse0

Verbatim

e0
“Increased corn yields did not result in a decrease in drainage nitrate exports”
✓ located verbatim in the source · abstract, characters 156–234

t0
“Corn”
✓ located verbatim in the source · title, characters 0–4

Title

Corn Yield Increase Under Constant Fertilizer Did Not Reduce Nitrate Export

Chelsea Connair Clifford; Emily R. Waring; Carl H. Pederson; et al. Journal of the ASABE 2023. doi:10.13031/ja.15538

Other claims from this paper (5)

Intervention effectobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

At Manhattan in 2007, yield did not decrease significantly until the final planting date.

Taxon: CORNZea mays subsp. mayst0
Treatment: delayed planting datest1
Outcome: yielde0
Direction: did not decreasee0
Qualifier: final planting date in 2007e0
Setting: Manhattan, KSe0

Not reportedComparator

Verbatim

t0
“CORN”
✓ located verbatim in the source · title, characters 30–34

e0
“yield at Manhattan, KS, did not decrease significantly until the final planting date in 2007”
✓ located verbatim in the source · abstract, characters 976–1068

t1
“delayed planting dates and hybrids of varying maturity revealed that yield at Manhattan, KS”
✓ located verbatim in the source · abstract, characters 907–998

Title

EFFECT OF DELAYED PLANTING ON CORN IN CENTRAL KANSAS

Aaron James Sindelar; Kraig L. Roozeboom K-State Research Exchange (Kansas State University) 2008

Other claims from this paper (4)

Intervention effect At Manhattan in 2008, delayed planting did not decrease yield.
Intervention effect At Belleville in 2007, later planting increased yield.
Intervention effect At Belleville in 2008, planting date did not affect yield.
Intervention effect At Hutchinson, yield decreased significantly with successive planting dates; the supplied sentence is cut off.

Associationobservedoriginal resultno effectmeasured

Claim · model-written summary

Corn yield did not decrease when water application exceeded 80% of calculated evapotranspiration.

Taxon: cornZea mays subsp. mayse0
Treatment: water applicatione0
Outcome: corn yielde0
Direction: did not existe0
Qualifier: higher than 80% of the calculated evapotranspiratione0

Verbatim

e0
“a decrease on corn yield did not exist if water application was higher than 80% of the calculated evapotranspiration”
✓ located verbatim in the source · abstract, characters 1673–1789

Title

Effects of water distribution uniformity of sprinkler irrigation systems on corn yield.

Roberto Simón Martínez; J. Montero; J.I. Córcoles; et al. 2003

Other claims from this paper (7)

Observation In 2001, sprinkler uniformity averaged 76% in EP 1 and 78% in EP 2.
Observation In 2001, corn yield uniformity was 89% in EP 1 and 90% in EP 2.
Association Corn yield variability was lower than water application variability in the first year.
Observation In 2002, average sprinkler uniformity was 58% in EP 1 versus 80% in the control plot.
Observation In 2002, accumulated water uniformity was 60% in EP 1 and 92% in EP 2.
Observation In 2002, yield uniformity was 55% in EP 1 and 92% in EP 2.
Association Applied water and corn yield were significantly related in both years.

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Nitrogen up to 150 lbs. per acre produced neither a corn yield increase nor decrease in Day County under dry conditions.

Taxon: cornZea mays subsp. mayse0
Treatment: nitrogen rates up to 125 and 150 lbs. per acree0
Outcome: yielde0
Direction: Neither a yield increase of a yield decreasee0
Setting: Day Co.e0

Not reportedComparator

Verbatim

e0
“Wheat in McPherson Co. and corn in Day Co. received nitrogen rates up to 125 and 150 lbs. per acre. Neither a yield increase of a yield decrease was measure at either location.”
✓ located verbatim in the source · abstract, characters 297–473

Title

Did the Fertilizer or Drought Burn it Up

James R. Gerwing Open PRAIRIE (South Dakota State University) 1988

Other claims from this paper (3)

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Cover crops did not decrease corn grain yield at the AONR.

Taxon: cornZea mays subsp. mayst0
Treatment: cover cropse1
Outcome: corn grain yield at the AONRe1
Direction: no_changeinferrede1
Setting: Eastern Nebraskae2

Not reportedComparator

Verbatim

e1
“cover crops did not decrease the corn grain yield at the AONR”
✓ located verbatim in the source · abstract, characters 673–734

e2
“Eastern Nebraska”
✓ located verbatim in the source · abstract, characters 599–615

t0
“corn”
✓ located verbatim in the source · title, characters 35–39

Title

Cover crops did not change optimal corn nitrogen rate over three variable precipitation seasons in the Western Corn Belt

Tauana Ferreira de Almeida; Lucas Pecci Canisares; Emily Robinson; et al. Agronomy Journal 2025. doi:10.1002/agj2.70129

Other claims from this paper (7)

Intervention effect Cover crops did not increase the AONR compared with the no-cover crop treatment.
Observation In 2021, with near-normal precipitation, corn yield at the AONR and the AONR were the highest of the three years.
Observation In 2022, with about half the 30-year average rainfall, yield at the AONR decreased across treatments.
Intervention effect In 2023, cover crop treatments had no significant effect on the AONR.
Observation In 2023 there was a decrease in yield compared with near-normal precipitation in 2021.
Mechanism Weather was the dominant factor driving the AONR.
Recommendation The results do not support the need for higher N rates after winter cover crops.

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

V12 topdressing combined with sowing nitrogen did not decrease grain yield.

Taxon: cornZea mays subsp. mayst0
Treatment: Late topdressing fertilizations (V12)e0
Outcome: grain yielde0
Direction: did not cause a decreasee0
Comparator: nitrogen fertilization at sowinge0

Verbatim

e0
“Late topdressing fertilizations (V12) did not cause a decrease in grain yield when combined with nitrogen fertilization at sowing, moreover resulted in higher NUE.”
✓ located verbatim in the source · abstract, characters 1195–1358

t0
“Yield and nutritional efficiency of corn in response to rates and splits of nitrogen fertilization”
✓ located verbatim in the source · title, characters 0–98

Title

Yield and nutritional efficiency of corn in response to rates and splits of nitrogen fertilization

Telmo Jorge Carneiro Amado; Enrique Oswin Hahn Villalba; Rafael Pivotto Bortolotto; et al. Revista CERES 2017. doi:10.1590/0034-737x201764040003

Other claims from this paper (5)

Association Nitrogen fertilizer dose had a linear relationship with NDVI at V8.
Association Nitrogen fertilizer dose had a linear relationship with NDVI at V12.
Intervention effect V12 topdressing combined with sowing nitrogen yielded higher NUE.
Intervention effect Split nitrogen application gave better NUE than schedules omitting sowing or topdressing nitrogen.
Recommendation Delaying nitrogen topdressing was proposed as an option for scheduling fertilization around regional climate forecasts.

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“yield decrease”

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