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 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.

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.

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Ploughing to 21 and 28 cm significantly decreased soil bulk density.

Taxon: Upland Paddyt0
Treatment: 21 and 28 cm. ploughinge0
Outcome: bulk densitye0
Direction: decreasee0

Not reportedComparator

Verbatim

t0
“Upland Paddy”
✓ located verbatim in the source · title, characters 39–51

e0
“A significant decrease in bulk density was observed with the 21 and 28 cm. ploughing, negatively correlated with dry matter of crop roots and yield of grain”
✓ located verbatim in the source · abstract, characters 183–339

Title

Effect of Depth of Tillage on Yield of Upland Paddy and on Associated Weeds

H. K. Pande; V. M. Bhan Experimental Agriculture 1966. doi:10.1017/s0014479700026752

Other claims from this paper (6)

Association Bulk density was negatively correlated with dry matter of crop roots and grain yield.
Intervention effect Tillage to 28 cm significantly reduced weed population and dry matter compared with tillage at 7 and 14 cm.
Association There were significant relations between weed dry matter and grain yield.
Intervention effect Crop roots under tractor tillage were significantly greater than with 7 cm tillage.
Intervention effect Grain yield was maximum under 28 cm tillage, followed by 21, 14 and 7 cm tillage in that order.
Association Higher grain yields were associated with more fertile tillers per metre of row and higher yields per tiller.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Higher seed density slightly decreased productivity under water-logged direct sowing.

Taxon: rice plantOryza sativat0
Treatment: Increase of the seeding densitye0
Outcome: productivitye0
Direction: decreasee0

Not reportedComparator

Verbatim

e0
“Increase of the seeding density and amount of nitrogen fertilizer resulted in a little increase in productivity in the case of direct sowing under upland condition while in a slight decrease in the case of direct sowing under water-logged condition”
✓ located verbatim in the source · abstract, characters 454–702

t0
“Studies on the Short Period Cultivation of Direct Sown Rice Plant : 2. Productivity of direct sown rice plant under short period cultivation in different seasons.”
✓ located verbatim in the source · title, characters 0–162

Title

Studies on the Short Period Cultivation of Direct Sown Rice Plant : 2. Productivity of direct sown rice plant under short period cultivation in different seasons.

Yoshiyuki KOMATSU; Norimitsu ISHIKURA; Isamu KAWASAKI Japanese Journal of Crop Science 1965. doi:10.1626/jcs.33.209

Other claims from this paper (7)

Observation Only early grown upland rice showed potential for increased productivity.
Intervention effect Increasing seed density slightly increased productivity under upland direct sowing.
Intervention effect Increasing nitrogen fertilizer slightly increased productivity under upland direct sowing.
Intervention effect Higher nitrogen fertilizer slightly decreased productivity under water-logged direct sowing.
Observation Late-sown Eiko yielded 34.6 kg/a of brown rice at 600 grains per m2.
Recommendation Late rice cultivation should prevent cool-weather damage by heading within a set time limit.
Recommendation Increasing main-stem panicles per area should help increase yield in late rice cultivation.

Associationobservedoriginal resultmeasured

Claim · model-written summary

Bulk density was negatively correlated with dry matter of crop roots and grain yield.

Taxon: Upland Paddyt0
Outcome: dry matter of crop roots and yield of graine0
Direction: negatively correlatede0
Comparator: bulk densitye0

Verbatim

t0
“Upland Paddy”
✓ located verbatim in the source · title, characters 39–51

e0
“A significant decrease in bulk density was observed with the 21 and 28 cm. ploughing, negatively correlated with dry matter of crop roots and yield of grain”
✓ located verbatim in the source · abstract, characters 183–339

Title

Effect of Depth of Tillage on Yield of Upland Paddy and on Associated Weeds

H. K. Pande; V. M. Bhan Experimental Agriculture 1966. doi:10.1017/s0014479700026752

Other claims from this paper (6)

Intervention effect Ploughing to 21 and 28 cm significantly decreased soil bulk density.
Intervention effect Tillage to 28 cm significantly reduced weed population and dry matter compared with tillage at 7 and 14 cm.
Association There were significant relations between weed dry matter and grain yield.
Intervention effect Crop roots under tractor tillage were significantly greater than with 7 cm tillage.
Intervention effect Grain yield was maximum under 28 cm tillage, followed by 21, 14 and 7 cm tillage in that order.
Association Higher grain yields were associated with more fertile tillers per metre of row and higher yields per tiller.

Associationobservedoriginal resultmeasured

Claim · model-written summary

Canopy absorptivity of incoming solar radiation decreased as plant density increased.

Taxon: Leaf beete0
Treatment: plant density values appliede5
Outcome: absorptivitye5
Direction: decreasese5

Verbatim

e0
“Leaf beet plants (Beta vulgaris L, var. flavascens D. C.) were raised in gravel culture beds in polythin growth chambers from June 11 to July 10, 1965”
✓ located verbatim in the source · abstract, characters 159–309

e5
“The absorptivity decreases throughout the range of plant density values applied, although the initial decrease is more rapid”
✓ located verbatim in the source · abstract, characters 1396–1520

Title

The Effect of Carbon Dioxide Concentration of Atomospheric on Growth of Leaf Beet with Various Plant Densities

K. YABUKI; J. TAMURA; Y. ODA; et al. Journal of Agricultural Meteorology 1967. doi:10.2480/agrmet.23.25

Other claims from this paper (6)

“decrease in density”

Claim types

Direction of the findings

Over time

Claim type

Research area

Polarity

Statistics