Search claims · PlantClaims

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

A yield decrease under soil heating occurred only with tall fescue during the summer.

Taxon: tall fescueLolium arundinaceume7
Outcome: yielde7
Direction: decreasee7
Qualifier: onlye7
Setting: during the summere7

Verbatim

e7
“A yield decrease occurred only with tall fescue during the summer”
✓ located verbatim in the source · abstract, characters 1308–1373

Title

Yield Response to Soil Warming: Agronomic Crops¹

K. A. Rykbost; L. Boersma; H. J. Mack; et al. Agronomy Journal 1975. doi:10.2134/agronj1975.00021962006700060001x

Other claims from this paper (9)

Intervention effect Soil heating increased yield of tall rescue by 19% over unheated plots.
Intervention effect Soil heating increased yield of sudangrass by about 50% over unheated plots.
Observation Yield increases from soil heating varied widely from year to year for the same crop.
Association The highest yield increases from soil heating occurred in years when yields on unheated plots were lowest.
Association Yield increases were highly significantly correlated with yields from unheated plots.
Association Soil heating appears most effective when climatic conditions and management factors are limiting.
Association Higher soil temperatures had their greatest effect on crop growth rates in early spring.
Intervention effect Heating increased the average soil temperature from 0 to 100 cm deep by about 10 C.
Intervention effect Heating increased the average temperature of the 0 to 10 cm soil layer by less than 3 C.

Associationobservedoriginal resultmeasured

Claim · model-written summary

Greater growing-season rainfall appeared to decrease yield.

Taxon: sugar beetBeta vulgaris subsp. vulgarist0
Outcome: yielde0
Direction: decreasee0
Setting: rainfall during the growing seasone0

Verbatim

e0
“increasing amounts of rainfall during the growing season appeared to decrease yield”
✓ located verbatim in the source · abstract, characters 577–660

t0
“sugar beet”
✓ located verbatim in the source · title, characters 47–57

Title

The effect of soil type and related factors on sugar beet yield

R. Webster; C. A. H. Hodge; A. P. Draycott; et al. The Journal of Agricultural Science 1977. doi:10.1017/s0021859600034973

Other claims from this paper (19)

Association Year-to-year variation explained 20% of yield variation.
Association Sugar yield increased over time by 0·042 t/ha/year.
Observation Experimental yields followed national yields but were greater.
Association Delayed sowing depressed yield by 0–02 t sugar/ ha/day.
Association Early harvest depressed yield by 0·01 t sugar/ ha/day.
Observation Scottish yields were 1·4 t/ha lower than England and Wales.
Observation No regional yield differences were evident within England and Wales.
Association Moderately drained soils yielded better than well-drained or imperfectly drained soils.
Association Well-drained and imperfectly drained soils yielded better than droughty and poorly drained soils.
Association Adjusted yields differed by 1·0 t/ha among drainage classes.
Association Topsoil texture had no consistent effect on mean yield.
Association Subsoil texture had an appreciable effect on yield, with sandy and chalk soils poor and silt and peat best.
Association Subsoil texture accounted for almost 2 t/ha difference in sugar yield.
Association Major soil groups distinguished yields.
Association Yield was highest on gleyed calcareous soils, peats and humic gleys and lowest on rendzinas and brown calcareous soils.
Association Nitrogen and potassium responses varied with topsoil and subsoil texture, unlike phosphorus response.
Intervention effect Nitrogen increased yield most on sandy soils and least on fine silts and peats.
Intervention effect Potassium increased yield most on sandy soils and least on fine silts and peats.
Recommendation The authors recommend dedicated experiments to guide selection of land for sugar beet.

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

The yield decrease of wheat increased with subsoil Al.

Taxon: wheatTriticum aestivume0
Treatment: subsoil Ale3
Outcome: yield decreasee3
Direction: increasede3

Verbatim

e0
“toxicity on wheat growth were studied”
✓ located verbatim in the source · abstract, characters 112–149

e3
“the yield decrease increased with subsoil Al”
✓ located verbatim in the source · abstract, characters 935–979

Title

Interacting effects of topsoil water and nitrogen supply on subsoil aluminium toxicity

S. J. Can; G. S. P. Ritchie Communications in Soil Science and Plant Analysis 1994. doi:10.1080/00103629409369268

Other claims from this paper (5)

Associationobservedoriginal resultnot significant (as stated)measured

Claim · model-written summary

The maize yield decrease from delayed emergence was not statistically related to yield stability zones.

Taxon: maizeZea mayse0
Outcome: maize yielde0
Direction: decreasee0
Setting: yield stability zonese0

Not reportedTreatmentComparator

Verbatim

e0
“The decrease in maize yield caused by the delay in emergence was not statistically related to yield stability zones”
✓ located verbatim in the source · abstract, characters 2129–2244

Title

Plant emergence and maize (Zea mays L.) yield across multiple farmers’ fields

S. Albarenque; B. Basso; O. Davidson; et al. Field Crops Research 2023. doi:10.1016/j.fcr.2023.109090

Other claims from this paper (7)

Observation Individual maize emergence occurred 3 to 31 days after planting.
Association Emergence timing variation affected yield and yield components more than within-row spacing variation.
Association The impact of emergence variation was generally larger in stable low-yield areas.
Association Plant yield fell by 7% per day of emergence delay.
Association Grain number fell by 6% per day of emergence delay.
Association Final crop yield fell by 8.5% per day of emergence delay.
Association Delayed emergence tended to have a more negative impact in low yield stability zones.

Associationobservedoriginal resultmeasured

Claim · model-written summary

Varieties with a greater yield decrease under sub-soiling showed a greater decrease in the ratio.

Taxon: rice plantOryza sativae0
Material: varieties which showed greater extent of yield decrease by sub-soilinge1
Outcome: the ratioe1
Direction: greater decreasee1

Verbatim

e0
“Sub-soiling method, breaking sub-soil and not mixing to surface soil, was tested with regard to the growth and yield of rice plant”
✓ located verbatim in the source · abstract, characters 0–130

e1
“varieties which showed greater extent of yield decrease by sub-soiling were accompanied with greater decrease in the ratio”
✓ located verbatim in the source · abstract, characters 1602–1724

Title

Studis on Sub-Soiling in Paddy Field

Hiroyuki TAKAHASHI; Yasuo TAKAHASHI; Hiroshi IKEDA Japanese Journal of Crop Science 1962. doi:10.1626/jcs.31.98

Other claims from this paper (18)

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Soybean yield tended to decrease with wider rows and narrower spacing within rows.

Taxon: soybeanGlycine maxe1
Outcome: yielde0
Direction: decreasee0
Qualifier: tendede0
Setting: row widthse0

Verbatim

e0
“yield tended to decrease with wider row widths and narrower within row spacings”
✓ located verbatim in the source · abstract, characters 890–969

e1
“soybean [ Glycine max (L.) Merr.]”
✓ located verbatim in the source · abstract, characters 35–68

Title

Soybean Planting Patterns in Relation to Yield and Yield Components

T. Ikeda Agronomy Journal 1992. doi:10.2134/agronj1992.00021962008400060002x

Other claims from this paper (4)

Intervention effect Twin-zigzag soybean patterns yielded more than twin-rectangular patterns at 70-cm width.
Association The higher yields came from more seeds per plant.
Intervention effect Weight per seed was unaffected by planting pattern.
Recommendation The authors proposed that square planting patterns could increase yield.

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Each low-temperature day was associated with a 1% yield decrease.

Taxon: chickpeaCicer arietinumt0
Treatment: low-temperature daye0
Outcome: yielde0
Direction: decreasee0
Value: 1%e0

Verbatim

e0
“a low-temperature day with a 1% decrease in yield”
✓ located verbatim in the source · abstract, characters 1007–1056

t0
“chickpea”
✓ located verbatim in the source · title, characters 104–112

Title

Relationships of frequencies of extreme low temperatures with grain yield of some Australian commercial chickpea cultivars

Yashvir S. Chauhan; Sam Allard; Steve Krosch; et al. International Journal of Biometeorology 2022. doi:10.1007/s00484-022-02344-9

Other claims from this paper (7)

Observation Mean chickpea yield varied from 1 to 3 t/ha.
Association Yield was negatively associated with post-flowering frosts.
Association Yield was negatively associated with low-temperature days.
Association Yield was positively associated with pre-flowering frosts.
Association Each post-flowering frost was associated with a 5% yield decrease.
Association Cultivar by site interaction was significant only in experiments with six cultivars.
Recommendation Management and breeding to overcome post-flowering cold are expected to increase and stabilize yield.

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Beyond the protein-yield threshold, a further increase in rice protein content results in a decrease in grain yield.

Taxon: RiceOryza sativat0
Compound: protein contente0
Outcome: grain yielde0
Direction: decreasee0

Verbatim

e0
“further increase in the protein content results in a decrease in grain yield”
✓ located verbatim in the source · abstract, characters 1205–1281

t0
“Rice”
✓ located verbatim in the source · title, characters 47–51

Title

Influence of Environment on Protein Content of Rice¹

K. A. Gomez; S. K. De Datta Agronomy Journal 1975. doi:10.2134/agronj1975.00021962006700040029x

Other claims from this paper (6)

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Seed cotton yield tended to decrease as weed density increased.

Taxon: cottonGossypium hirsutumt0
Treatment: weed densitye0
Interactor: Goosegrasst1weed
Outcome: Seed cotton yielde0
Direction: decreasee0

Verbatim

e0
“Seed cotton yield tended to decrease with the increase in weed density”
✓ located verbatim in the source · abstract, characters 379–449

t0
“cotton”
✓ located verbatim in the source · title, characters 48–54

t1
“Goosegrass”
✓ located verbatim in the source · title, characters 0–10

Title

Goosegrass (Eleusine indica) density effects on cotton (Gossypium hirsutum)

Xiao-yan MA; Han-wen WU; Wei-li JIANG; et al. Journal of Integrative Agriculture 2015. doi:10.1016/s2095-3119(15)61058-9

Other claims from this paper (10)

Intervention effect Goosegrass at 4 plants per metre of row significantly reduced cotton yield by 20 to 27%.
Intervention effect The regression model predicted a 50% cotton yield loss at 11.6–19.2 goosegrass plants per metre of row.
Intervention effect Boll production was unaffected in the early growing season.
Intervention effect At 4 plants per metre of row, boll numbers per cotton plant fell about 25% late in the growing season.
Intervention effect Cotton boll weight and seed numbers per boll were significantly reduced by 8% at 4 goosegrass plants per metre of row.
Intervention effect Cotton height, stem diameter and sympodial branch number were less affected than yield by goosegrass competition.
Intervention effect Seed index, lint percentage and lint fiber properties were unaffected by weed competition.
Association Intraspecific competition produced density-dependent goosegrass biomass per plant of 142–387 g dry weight at harvest.
Association Goosegrass biomass per square metre tended to increase quadratically with weed density.
Recommendation The authors conclude that effective goosegrass management is needed to protect cotton yield.

Associationobservedreview summarynegativebasis n/a

Claim · model-written summary

Field sprouting in bunch groundnut varieties is associated with a 20 %-25 % yield decrease.

Taxon: groundnutArachis hypogaeat0
Material: bunch varietiese0
Outcome: yielde0
Direction: decreasee0
Value: 20 %-25 %e0

Verbatim

e0
“Field sprouting in bunch varieties results in a 20 %-25 % yield decrease”
✓ located verbatim in the source · abstract, characters 549–621

t0
“groundnut”
✓ located verbatim in the source · title, characters 48–57

Title

Insights into pre-harvest sprouting dynamics in groundnut

R Ezhilarasi; T Ragavan; E Subramanian; et al. Plant Science Today 2025. doi:10.14719/pst.8436

Other claims from this paper (5)

“yield decrease”

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