Search claims · PlantClaims

Intervention effectobservedoriginal resultnegativesignificant (as stated)measured

Claim · model-written summary

Yield decreased significantly at 29,040 plants per acre.

Treatment: 29,040 plants per acree0
Outcome: yielde0
Direction: decreasee0

Not reportedTaxonComparator

Verbatim

e0
“A significant decrease in yield was obtained at the population of 29,040 plants per acre.”
✓ located verbatim in the source · abstract, characters 523–612

Title

Influence of Row Spacing and Plant Density on Single Harvest Tomato Yields1

Gerald E. Wilcox Journal of the American Society for Horticultural Science 1970. doi:10.21273/jashs.95.4.435

Other claims from this paper (7)

Intervention effect At 50% ripeness, yield increased from 6.0 to 13.1 tons per acre over 1,815 to 7,260 plants per acre.
Intervention effect At 50% ripeness, yield remained constant from 7,260 to 29,040 plants per acre in single rows.
Intervention effect At 50% ripeness, yield remained constant from 4,840 to 58,080 plants per acre in twin rows.
Intervention effect At 85% ripeness, single row yield rose from 7.5 to 20.8 tons per acre as density rose.
Observation Twin row ripe fruit yield plateaued at 19.3 to 22.8 tons per acre.
Intervention effect Three-inch plant spacing reduced yield significantly at the later harvest.
Method / resource A power curve expressed yield per plant against plants per acre.

Observationobservedoriginal resultmeasured

Claim · model-written summary

Root density of both hybrids decreased from week 11 to week 13.

Taxon: Sorghum bicolorSorghum bicolore0
Outcome: root densitye3
Direction: decreasede3
Qualifier: From week 11 (5 August) to week 13 (19 August)e3

Verbatim

e0
“sorghum [ Sorghum bicolor (L.) Moench]”
✓ located verbatim in the source · abstract, characters 22–60

e3
“From week 11 (5 August) to week 13 (19 August), both hybrids decreased in root density with a greater decrease noted for the senescent hybrid”
✓ located verbatim in the source · abstract, characters 1367–1508

Title

Root Distribution Patterns of Two Hybrid Grain Sorghums Under Field Conditions¹

R. E. Zartman; R. T. Woyewodzic Agronomy Journal 1979. doi:10.2134/agronj1979.00021962007100020025x

Other claims from this paper (6)

Associationobservedoriginal resultmeasured

Claim · model-written summary

As grass stands grow older, soil moisture increases as a result of a decrease in evaporative intensity.

Taxon: grass standse3
Treatment: grass stands grow oldere3
Outcome: moisturee3
Direction: increasese3
Qualifier: as a result of a decrease in evaporative intensitye3

Verbatim

e3
“As grass stands grow older, soil density increases as it reaches equilibrium values, their moisture increases as a result of a decrease in evaporative intensity, and the porosity and porosity of aeration decrease, but the effect of grasses on the physical properties of the soil increases”
✓ located verbatim in the source · abstract, characters 957–1245

Title

HYDROPHYSICAL SOIL FEATURES UNDER MIXED AGE PLANT FORMATION IN RECLAIMED AGROLANDSCAPE

D. А. Ivanov; М. V. Rublyuk Vestnik of the Russian agricultural science 1970. doi:10.30850/vrsn/2019/3/26-29

Other claims from this paper (11)

Mechanismauthor interpretationoriginal resultmeasured

Claim · model-written summary

Fewer grains per area at high density were attributed more to reduced late dry matter production than unfavorable partitioning.

Taxon: wheatTriticum aestivumt0
Outcome: decrease in the number of grains per unit areae0
Qualifier: lower production of total dry mattere0

Verbatim

e0
“this decrease in the number of grains per unit area may be attributable more to a lower production of total dry matter by the high populations during the later stages of ear development, than to an unfavourable partitioning of such dry matter between the ear and the rest of the plant.”
✓ located verbatim in the source · abstract, characters 2026–2311

t0
“wheat”
✓ located verbatim in the source · title, characters 50–55

Title

Plant population, shading and thinning studies in wheat

R. W. Willey; R. Holliday The Journal of Agricultural Science 1971. doi:10.1017/s0021859600064522

Other claims from this paper (10)

Intervention effect Shading during ear development decreased wheat grain yield.
Intervention effect Ear development shading decreased grains per ear.
Intervention effect Grain filling shading reduced grain yield.
Intervention effect Grain filling shading decreased grain size.
Intervention effect Thinning at anthesis did not increase yield per remaining ear.
Observation Earlier thinning showed competition progressively reduced ear capacity.
Association Higher population competition accelerated reduction in ear potential.
Association Grains per ear were suggested to most influence yield decline above optimum population.
Association Grain yield per area closely related to grains per area across population response curves.
Mechanism High population yield decline was suggested to result from fewer grains per area.

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Average pod weight of okra was inversely related to plant density in 3 of 4 cultivars

Taxon: okraAbelmoschus esculentuse0
Material: 3 of 4 cultivarse2
Treatment: plant densitye2
Outcome: Average pod weighte2
Direction: decreaseinferrede2

Verbatim

e0
“Four cultivars of okra ( Abelmoschus esculentus (L.) Moench) were grown with densities of 22, 65, and 130 plants/square meter on polyethylene mulched beds”
✓ located verbatim in the source · abstract, characters 9–163

e2
“Average pod weight with 3 of 4 cultivars was inversely related to plant density”
✓ located verbatim in the source · abstract, characters 342–421

Title

Response of Four Okra Cultivars on Mulched Beds to Plant Density1

E. E. Albregts; C. M. Howard HortScience 1976. doi:10.21273/hortsci.11.3.242

Other claims from this paper (4)

Intervention effect Pod number and marketable yield per unit area of okra were not affected by plant density
Intervention effect Pod number and marketable yield per plant of okra decreased with increasing plant density
Intervention effect Stalk diameter of okra decreased with increasing plant density
Association Plant stunting of okra occurred at the highest plant density

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

In 1968 and 1969 Longidorus elongatus density was negatively correlated with barley grain size.

Taxon: barleyHordeum vulgaret0
Interactor: L. elongatusLongidorus elongatuse3pest
Outcome: grain sizee3
Direction: decreaseinferrede3

Verbatim

t0
“Barley and Potatoes”
✓ located verbatim in the source · title, characters 77–96

e3
“In 1969 there was no correlation between the density of L. elongatus and barley yield but in both 1968 and 1969 there was a negative correlation with grain size”
✓ located verbatim in the source · abstract, characters 455–615

Title

Studies on the Relation between Deasity of Longidorus elongatus and Yield of Barley and Potatoes

E. B. BROWN; G. B. SYKES Plant Pathology 1975. doi:10.1111/j.1365-3059.1975.tb01899.x

Other claims from this paper (3)

Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Black grass bugs caused a slight decrease in cellular contents of intermediate wheatgrass.

Taxon: intermediate wheatgrasse0
Treatment: Black grass bugs (Labops hesperius)e0
Interactor: Labops hesperiusLabops hesperiuse0pest
Outcome: cellular contentse1
Direction: decreasee1
Qualifier: slighte1

Not reportedComparator

Verbatim

e0
“Black grass bugs (Labops hesperius) at a population density of 156 bugs per square meter did not affect herbage yields of intermediate wheatgrass but depressed seedhead production 56%”
✓ located verbatim in the source · abstract, characters 0–183

e1
“They caused a small but significant increase in concentrations of crude protein and a slight decrease in cellular contents”
✓ located verbatim in the source · abstract, characters 185–307

Title

Yield and Nutritional Quality of Intermediate Wheatgrass Infested by Black Grass Bugs at Low Population Densities

John C. Malechek; Alan M. Gray; B. Austin Haws Journal of Range Management 1977. doi:10.2307/3897754

Other claims from this paper (3)

Intervention effect Black grass bugs at 156 per square meter did not affect herbage yields of intermediate wheatgrass.
Intervention effect Black grass bugs at 156 per square meter reduced seedhead production of intermediate wheatgrass by 56%.
Intervention effect Black grass bugs caused a small but significant increase in crude protein concentration of intermediate wheatgrass.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Quality (crude protein and in-vitro dry matter digestibility) decreased over most of the larval density range.

Taxon: AlfalfaMedicago sativat0
Treatment: larval densitye6
Outcome: crude protein and in-vitro dry matter digestibilitye6
Direction: decreaseinferrede6

Not reportedComparator

Verbatim

e6
“Quality (crude protein and in-vitro dry matter digestibility) losses were observed over most of the range with a significant increase occurring at a larval density equivalent to 25–35% of the SLD value”
✓ located verbatim in the source · abstract, characters 669–870

t0
“First Cutting Alfalfa”
✓ located verbatim in the source · title, characters 68–89

Title

Impact of Alfalfa Weevil Larval Feeding on the Quality and Yield of First Cutting Alfalfa12

T. R. Hintz; M. C. Wilson; E. J. Armbrust Journal of Economic Entomology 1976. doi:10.1093/jee/69.6.749

Other claims from this paper (7)

Intervention effect Larval feeding by Hypera postica reduced both the yield and quality of first cutting alfalfa.
Association Yield declined linearly over most of the larval population range of alfalfa weevil.
Observation The loss per larva and the smallest larval density causing maximum yield reduction depend on alfalfa plant size at attack.
Observation Larger alfalfa plants withstand larger larval densities.
Intervention effect Yield increased significantly at larval densities equivalent to 15–22% of the SLD value.
Intervention effect Stem elongation was reduced at a larval density of 30–100% of the SLD value.
Intervention effect Quality losses increased significantly at a larval density equivalent to 25–35% of the SLD value.

Associationobservedoriginal resultmeasured

Claim · model-written summary

Reflectance in the 0.65 micron chlorophyll absorption band decreased as maize leaf area index increased.

Taxon: maizeZea mayst0
Organ / stage: leafe0
Outcome: reflectancee0
Direction: decreasee0
Qualifier: 0.65 micron chlorophyll absorption bande0

Verbatim

e0
“A decrease in reflectance was observed in the 0.65 micron chlorophyll absorption band as leaf area index increased.”
✓ located verbatim in the source · abstract, characters 873–988

t0
“maize”
✓ located verbatim in the source · title, characters 23–28

Title

Determining density of maize canopy. 3: Temporal considerations

E. R. Stoner; M. F. Baumgardner; P. E. Anuta; et al. NASA Technical Reports Server (NASA) 1972

Other claims from this paper (4)

Mechanismauthor interpretationoriginal resultpositivemeasured

Claim · model-written summary

The authors associated the one-third lower stomatal density of resistant varieties with resistance through reduced ozone-rich air entry.

Taxon: tobaccoNicotiana tabacume1
Outcome: resistancee0
Value: one‐thirde0
Qualifier: reducing the amount of ozone‐rich air which can enter the leafe0

Verbatim

e0
“This decrease in stomate density by one‐third in resistant varieties is thought to be associated with resistance by reducing the amount of ozone‐rich air which can enter the leaf.”
✓ located verbatim in the source · abstract, characters 361–540

e1
“tobacco ( Nicotiana tabacum L.)”
✓ located verbatim in the source · abstract, characters 102–133

Title

Stomate Density and Size as Related to Ozone‐Induced Weather Fleck in Tobacco¹

C. E. Dean Crop Science 1972. doi:10.2135/cropsci1972.0011183x001200040054x

Other claims from this paper (2)

“decrease in density”

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