Search claims · PlantClaims

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

The relation of yield index to weed density was a curve in which the rate of yield decrease rose progressively with density.

Taxon: 水稲e0
Treatment: タイヌビエの発生本数e0
Interactor: タイヌビエe0weed
Outcome: 収量減少速度e1
Direction: 漸増e1

Not reportedComparator

Verbatim

t0
“Rice Plants”
✓ located verbatim in the source · title, characters 25–36

e0
“タイヌビエの発生本数による水稲収量”
✓ located verbatim in the source · abstract, characters 38–55

e1
“収量指数と発生本数との関係は, 発生本数の増加にともなつて, 収量減少速度の漸増する曲線として示される”
✓ located verbatim in the source · abstract, characters 258–309

Title

Studies on the Damage to Rice Plants Due to Weed Competition

Kenji NODA; Keio OZAWA; Kazunori IBARAKI Journal of Weed Science and Technology 1968. doi:10.3719/weed.1968.49

Other claims from this paper (15)

Intervention effect Barnyard grass density had almost no effect on rice plant height.
Intervention effect In plots with many barnyard grass plants, rice elongation tended to be promoted in the middle growth stage.
Intervention effect Barnyard grass markedly affected rice tiller number, with a conspicuous decrease from the middle growth stage.
Intervention effect The tiller reduction affected final panicle number.
Intervention effect The effect on rice yield became more marked as barnyard grass density increased.
Intervention effect The yield loss was greater under heavy than light fertilisation.
Intervention effect The yield loss was greater at sparse than medium and dense planting.
Association Rice yield and total barnyard grass weight were related by logY = a - bX, with Y yield index and X weed weight.
Observation The yield components contributing to yield loss from weed competition ranked panicle number, ripened grain weight, spikelets per panicle, ripening ratio.
Intervention effect In mixed rice and barnyard grass stands the production structure declined quantitatively.
Intervention effect In mixed stands rice LAI decreased.
Intervention effect In mixed stands the quantitative development of assimilating and non-assimilating parts declined.
Intervention effect In mixed stands the N content of the leaf blades decreased in the middle growth stage.
Observation Rice reached its maximum nitrogen uptake early whereas barnyard grass kept absorbing until later.
Observation The authors consider competition between the two plants for nitrogen uptake to be large up to the first half of growth.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

In Fujiminori, the decrease in grain weight with irregular disposition was more marked at low seeding density than at high seeding density.

Taxon: RiceOryza sativat0
Material: Fujiminorie1
Treatment: low seeding densitye1
Outcome: decrease of grain weighte1
Direction: more markede1
Comparator: high onee1

Verbatim

t0
“Irregular Disposition of Rice Plant”
✓ located verbatim in the source · title, characters 14–49

e1
“In Fujiminori, decrease of grain weight with irregular disposition of plants was more marked in the case of low seeding density than in that of high one”
✓ located verbatim in the source · abstract, characters 1238–1390

Title

The Effect of Irregular Disposition of Rice Plant on Yield in Direct Sowing Culture

Masami HIMEDA; Seiichi IZUMI Japanese Journal of Crop Science 1965. doi:10.1626/jcs.33.399

Other claims from this paper (9)

Intervention effect More irregular disposition of rice plants caused a greater decrease in grain weight per unit area.
Intervention effect The decrease in grain weight with irregular disposition was more remarkable in Fujiminori than in Manryo.
Mechanism Decrease of grain weight was caused by a decrease in the number of panicles per unit area.
Association In Fujiminori, the number of panicles decreased as irregularity in plant disposition increased.
Intervention effect In Fujiminori, grain weight per panicle remained unchanged as irregularity in plant disposition increased.
Association In Manryo, grain weight per panicle increased.
Association In Manryo, the number of panicles decreased.
Intervention effect In plots of cv 30∼100 %, no decrease of grain weight was observed relative to the plot of cv 0 %.
Intervention effect In Manryo, the difference in the effect of irregular disposition on grain weight between spacing densities was not clear.

Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Ethanol extraction of the transparent zone showed a remarkable decrease in optical density.

Taxon: garden peaLathyrus oleraceuse0
Treatment: Ethanol extraction of the transparent zonee6
Outcome: optical densitye7
Direction: decreasee7

Not reportedComparator

Verbatim

e0
“garden pea pods versus Ascochyta pisi”
✓ located verbatim in the source · abstract, characters 330–367

e6
“Ethanol extraction of the transparent zone thus appeared on the agar media around the colony showed a very low inhibitory action on the conidia germination of Glomerella cingulata”
✓ located verbatim in the source · abstract, characters 2377–2556

e7
“a remarkable decrease in its optical density”
✓ located verbatim in the source · abstract, characters 2567–2611

Title

Relationship between the host specificity of pathogen and phytoalexin

Kazuo UEHARA Japanese Journal of Phytopathology 1964. doi:10.3186/jjphytopath.29.103

Other claims from this paper (6)

Intervention effect Pea phytoalexin strongly inhibited the growth of Piricularia oryzae, which cannot infect pea.
Intervention effect Pea phytoalexin inhibited the growth of Glomerella cingulata to a medium extent.
Intervention effect Pea phytoalexin inhibited Ascochyta pisi very weakly.
Observation Ascochyta pisi and Fusarium oxysporum detoxify pea phytoalexin.
Observation Both fungi tested showed PA-decomposing ability.
Intervention effect Ethanol extraction of the transparent zone showed very low inhibitory action on conidia germination of Glomerella cingulata.

Observationobservedoriginal resultmeasured

Claim · model-written summary

Latewood percentage and density decreased upward.

Taxon: KOREAN PINESt0
Outcome: latewood percentage,densitye0
Direction: decreasee0

Verbatim

t0
“KOREAN PINES”
✓ located verbatim in the source · title, characters 79–91

e0
“latewood percentage,density and so forth decrease”
✓ located verbatim in the source · abstract, characters 1676–1725

Title

COMPARATIVE STUDIES ON THE WOOD PROPERTIES OF THE PLANTATION-AND NATURAL-GROWN KOREAN PINES IN THE NORTHEASTERN FOREST REGION OF CHINA

And S Linye Kexue 1963

Other claims from this paper (18)

Observation Plantation pine diameter growth was more than four times faster than natural growth.
Observation Plantation pine length growth was about three times natural growth.
Observation Plantation tracheids were about 31% longer.
Observation Plantation early-wood tracheids were 11% larger.
Observation Plantation latewood tracheids were 28% larger.
Observation Plantation latewood percentage was 28% lower.
Observation Plantation density was 2% lower.
Observation Overall strength properties were about the same.
Observation At corresponding rings plantation wood was generally heavier and stronger.
Observation From pith outward, tracheid length and ring width decreased.
Observation Outside the first few years, tracheid diameter, latewood percentage and cell wall percentage varied little and irregularly.
Observation Plantation density and strength peaked at growth rings 9 to 18.
Observation Natural-grown density and strength peaked at rings 30 to 70.
Observation Tracheid length increased upward along the stem.
Observation Strength generally decreased upward, with a natural-grown maximum at 5.3 to 7.3 m.
Association Resin canal number was directly proportional to ring width.
Observation Resin canals were mostly in summerwood and transition regions.
Association Plantation wood density increased outward with age from pith, independent of ring width.

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

A further increase in crop density beyond a certain level did not decrease the size of wild oats.

Taxon: cereal cropst0
Treatment: further increase in crope4
Interactor: wild oatsAvenae4weed
Outcome: size of wild oatse4
Direction: did not decreasee4
Qualifier: Beyond a certain crop density dependent on soil fertilitye4

Not reportedComparator

Verbatim

t0
“COMPETITION FROM CEREAL CROPS ON THE GERMINATION”
✓ located verbatim in the source · title, characters 14–62

e4
“Beyond a certain crop density dependent on soil fertility, further increase in crop did not decrease the size of wild oats”
✓ located verbatim in the source · abstract, characters 749–871

Title

THE EFFECT OF COMPETITION FROM CEREAL CROPS ON THE GERMINATION AND GROWTH OF AVENA FATUA L. IN A NATURALLY‐INFESTED FIELD

JOAN M. THURSTON Weed Research 1962. doi:10.1111/j.1365-3180.1962.tb00199.x

Other claims from this paper (12)

Association Wild oats were controlled by a dense crop of an autumn-sown cereal.
Association The effectiveness of cereal crops against wild oats depended on crop density when the wild oats germinated in spring.
Association The crop genus was unimportant for the effectiveness against wild oats, provided the crop grew well on the site.
Intervention effect Winter wheat and winter rye were equally effective in controlling wild oats.
Intervention effect Wild oats grew much less vigorously in a light barley crop than on fallow plots.
Intervention effect The heaviest crop did not completely suppress wild oats.
Mechanism The crop affected wild oats mainly by decreasing seedling growth.
Mechanism Some wild oat seeds may have remained dormant under winter wheat and winter rye, perhaps because the crops decreased soil moisture.
Intervention effect Nitrogenous fertilizer increased the weight of both crops and wild oats.
Association Barley was more severely affected by soil acidity than wild oats.
Intervention effect On acid areas of barley plots, wild oats were larger than where the pH was higher.
Intervention effect In wheat and rye scarcely affected by soil acidity, the size of wild oat plants was unaffected by soil pH.

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Drought stress apparently decreased saltbush stocking density at one site.

Taxon: A. vesicariaAtriplex vesicariae0
Treatment: drought stresse0
Outcome: stocking densitye0
Direction: decreasee0

Verbatim

e0
“drought stress had brought about an apparent decrease in the stocking density of A. vesicaria”
✓ located verbatim in the source · abstract, characters 874–967

Title

Studies on structure in plant communities. V. Pattern in Atriplex vesicaria communities in South-Eastern Australia

DJ Anderson Australian Journal of Botany 1967. doi:10.1071/bt9670451

Other claims from this paper (6)

Observation Pattern scales and intensities varied considerably between sites.
Observation Every sampled site had contagion at two or more scales.
Observation No sampled site showed uniform distribution.
Mechanism The two main spatial scales were attributed to gregariousness and soil patchiness or gilgai relief.
Association The drought-associated density reduction accompanied lower pattern intensity.
Observation The original spatial scales persisted in the residual population.

Associationobservedoriginal resultmeasured

Claim · model-written summary

The degree of aggregation of eggs, expressed as 1/k, tends to decrease as egg or parental density increases.

Taxon: cabbage plantsBrassica oleracea var. capitatae1
Treatment: parental densitye3
Interactor: Pieris rapae crucivoraPieris rapae crucivorae0herbivore
Outcome: degree of aggregation expressed as the reciprocal of the parametere3
Direction: tends to decreasee3
Setting: net housee1

Verbatim

e0
“in the common cabbage butterfly, Pieris rapae crucivora”
✓ located verbatim in the source · abstract, characters 102–157

e1
“the countings of egg number per plant were made on both cabbage plants cultivated in the farm and planted in the net house”
✓ located verbatim in the source · abstract, characters 160–282

e3
“the degree of aggregation expressed as the reciprocal of the parameter, 1/ k , tends to decrease as the egg or parental density increases”
✓ located verbatim in the source · abstract, characters 483–620

Title

Influence of parental density on the distribution pattern of eggs in the common cabbage butterfly, Pieris rapae crucivora

Shiro Kobayashi Population Ecology 1965. doi:10.1007/bf02518794

Other claims from this paper (4)

Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Lower plant density proportionally increased barley culm number and ear number.

Taxon: barleyHordeum vulgaree0
Treatment: Decrease in plant densitye1
Outcome: culm number and ear numbere1
Direction: increasee1

Not reportedComparator

Verbatim

e0
“Using 12 cultivars of barley, density response was investigated at five levels of spacing”
✓ located verbatim in the source · abstract, characters 0–89

e1
“Decrease in plant density caused proportional increase in vegetative growth, that is culm number and ear number”
✓ located verbatim in the source · abstract, characters 237–348

Title

Studies on Competition in Plants and Animals : XI. Competitive Ability and Density Response in Barley

Kan-Ichi SAKAI; Shin-ya IYAMA Ikushugaku zasshi 1966. doi:10.1270/jsbbs1951.16.1

Other claims from this paper (3)

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Apple yield decreased as preplant nematode density increased.

Taxon: appleMalus domesticae0
Interactor: Pratylenchus penetransPratylenchus penetranst0pest
Outcome: yielde0
Direction: decreasee0
Qualifier: before apple seedlings were plantede0

Verbatim

e0
“there was good evidence of a decrease in yield with increased nematode density before apple seedlings were planted”
✓ located verbatim in the source · abstract, characters 128–242

t0
“Pratylenchus penetrans”
✓ located verbatim in the source · title, characters 43–65

Title

Nematodes in relation to plant growth, IV. Pratylenchus penetrans (Cobb) on orchard trees.

H. Hoestra; M. Oostenbrink Netherlands Journal of Agricultural Science 1962. doi:10.18174/njas.v10i4.17587

Other claims from this paper (5)

Associationobservedoriginal resultpositivemeasured

Claim · model-written summary

Jassid infestation decreased as cotton leaf hair density increased.

Taxon: cottonGossypium hirsutumt0
Interactor: jasside0pest
Outcome: jassid infestation‐averagese0
Direction: decreasee0
Qualifier: hair‐densitye0

Verbatim

e0
“There was a general tendency in the jassid infestation‐averages to decrease which the increase in hair‐density.”
✓ located verbatim in the source · abstract, characters 2466–2577

t0
“Cotton”
✓ located verbatim in the source · title, characters 30–36

Title

The Susceptibility of Certain Cotton Varieties to Empoasca spp. (Jassidae)‐Infestation Under Some Different Agricultural Practices in U.A.R.

M. M. Hosny; S. A. El.‐Dessouki Zeitschrift für Angewandte Entomologie 1968. doi:10.1111/j.1439-0418.1968.tb04127.x

Other claims from this paper (14)

Observation Unfertilized cotton varieties had low, insignificantly different jassid numbers.
Association Jassid numbers increased with fertilization rate.
Observation Bahteem 185 was least susceptible among four varieties under fertilization.
Observation Dandarah was most susceptible among four varieties under fertilization.
Observation A new pubescent G. barbadense strain was most resistant to jassids.
Observation Triespecies No. I was most susceptible to jassids.
Observation The other ten varieties had intermediate susceptibility or resistance.
Observation Giza 66 was the most susceptible across sowing dates, spacing and fertilization.
Observation The other four varieties showed little difference in susceptibility.
Intervention effect Sowing on 25th March reduced jassid infestation.
Intervention effect Jassid counts were higher for 10th March and 8th April sowing.
Intervention effect Jassid counts were still higher for 3rd May sowing.
Mechanism Leaf hair density conferred resistance only when hairs extended to lower leaf veins.
Association Hair length in the tested range had no apparent role in jassid resistance.

“decrease in density”

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