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“decrease in density”

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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.

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)

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.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Higher nitrogen dosages at the first two top dressings reduced grain yield.

Taxon: riceOryza sativat0
Treatment: Higher dosages of nitrogen applied at the first top-and second top-dressingse0
Outcome: grain yielde0
Direction: decreasee0

Not reportedComparator

Verbatim

e0
“Higher dosages of nitrogen applied at the first top-and second top-dressings resulted in the decrease of grain yield, severe occurrence of neck blast disease and lodging”
✓ located verbatim in the source · abstract, characters 1025–1194

t0
“Rice”
✓ located verbatim in the source · title, characters 130–134

Title

Effects of Split Application of Fertilizaer and Planting Density on Yield, Components of Yield, and Other Agronomic Characters of Rice (III)

W. L. Chang; S. C. Yang 中華農業研究 1964. doi:10.29951/jarc.196412.0001

Other claims from this paper (19)

Intervention effect Split fertilization raised grain yield relative to conventional application.
Intervention effect Split fertilization increased panicle number.
Intervention effect Split fertilization increased grain number.
Intervention effect Split phosphoric fertilizer had no evident response in grain yield or other measured traits.
Intervention effect Four nitrogen splits at 3: 3: 3: 1 gave the highest grain yield.
Intervention effect Higher nitrogen dosages at the first two top dressings increased neck blast disease.
Intervention effect Higher nitrogen dosages at the first two top dressings increased lodging.
Intervention effect The potassium split ratio 6:4 gave better grain yield than 6.7: 3.3.
Intervention effect Higher planting density raised yield relative to lower density.
Intervention effect Higher planting density increased panicles per unit area.
Intervention effect Split fertilization reduced tillering and culm length early in growth.
Intervention effect Split fertilization gave greater tillering and culm length at maturity.
Intervention effect Split fertilization produced heavier and longer panicles.
Intervention effect High planting density reduced tillers, plant height, panicle weight and panicle length.
Intervention effect Split fertilization increased neck blast disease occurrence.
Intervention effect Neck blast disease reduced grain weight.
Intervention effect Split fertilization increased internode length, particularly the third and fifth internodes.
Intervention effect Planting density did not affect rice blast occurrence.
Intervention effect High planting density tended to increase lodging.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Higher nitrogen fertilizer slightly decreased productivity under water-logged direct sowing.

Taxon: rice plantOryza sativat0
Treatment: amount of nitrogen fertilizere0
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 seed density 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.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Higher nitrogen dosages at the first two top dressings increased lodging.

Taxon: riceOryza sativat0
Treatment: Higher dosages of nitrogen applied at the first top-and second top-dressingse0
Outcome: lodginge0

Not reportedComparatorDirection

Verbatim

e0
“Higher dosages of nitrogen applied at the first top-and second top-dressings resulted in the decrease of grain yield, severe occurrence of neck blast disease and lodging”
✓ located verbatim in the source · abstract, characters 1025–1194

t0
“Rice”
✓ located verbatim in the source · title, characters 130–134

Title

Effects of Split Application of Fertilizaer and Planting Density on Yield, Components of Yield, and Other Agronomic Characters of Rice (III)

W. L. Chang; S. C. Yang 中華農業研究 1964. doi:10.29951/jarc.196412.0001

Other claims from this paper (19)

Intervention effect Split fertilization raised grain yield relative to conventional application.
Intervention effect Split fertilization increased panicle number.
Intervention effect Split fertilization increased grain number.
Intervention effect Split phosphoric fertilizer had no evident response in grain yield or other measured traits.
Intervention effect Four nitrogen splits at 3: 3: 3: 1 gave the highest grain yield.
Intervention effect Higher nitrogen dosages at the first two top dressings reduced grain yield.
Intervention effect Higher nitrogen dosages at the first two top dressings increased neck blast disease.
Intervention effect The potassium split ratio 6:4 gave better grain yield than 6.7: 3.3.
Intervention effect Higher planting density raised yield relative to lower density.
Intervention effect Higher planting density increased panicles per unit area.
Intervention effect Split fertilization reduced tillering and culm length early in growth.
Intervention effect Split fertilization gave greater tillering and culm length at maturity.
Intervention effect Split fertilization produced heavier and longer panicles.
Intervention effect High planting density reduced tillers, plant height, panicle weight and panicle length.
Intervention effect Split fertilization increased neck blast disease occurrence.
Intervention effect Neck blast disease reduced grain weight.
Intervention effect Split fertilization increased internode length, particularly the third and fifth internodes.
Intervention effect Planting density did not affect rice blast occurrence.
Intervention effect High planting density tended to increase lodging.

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“decrease in density”

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