Search claims · PlantClaims

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Crop weed competition reduced grain yield by 25% to 47%.

Outcome: grain yielde0
Direction: decreaseinferrede0
Value: 25% to 47%e0

Not reportedTaxonInteractor

Verbatim

e0
“grain yield by 25% to 47%”
✓ located verbatim in the source · abstract, characters 921–946

Title

Weeds of Paddy Field at Kirtipur, Kathmandu

Sailaza Manandhar; Bharat B Shrestha; Hari D Lekhak Scientific World 1970. doi:10.3126/sw.v5i5.2665

Other claims from this paper (13)

Observation The paddy plots contained 52 weed species.
Observation Weed density peaked in September at 105 pl/m2.
Association Weedy plots had significantly reduced straw yield.
Association Weedy plots had significantly reduced grain yield.
Association Weed species richness was negatively correlated with straw yield.
Association Crop weed competition reduced straw yield by 13% to 38%.
Association Weed growth changed soil pH.
Association Weed growth reduced soil nitrogen and phosphorus content.
Intervention effect Dominant weed extracts had a weak effect on paddy seed germination.
Intervention effect Most weed extracts inhibited paddy root and shoot elongation.
Observation Root elongation was more sensitive to allelopathic inhibition than shoot elongation.
Intervention effect Stem extracts caused higher inhibition of paddy seedling growth than leaf and root extracts.
Intervention effect For Ageratum conyzoides, root extract had the highest inhibition.

Associationauthor interpretationoriginal resultmeasured

Claim · model-written summary

Na2CO3 indicates a decrease in root activity.

Taxon: plantsViridiplantaee3
Treatment: Na 2 CO 3e7
Outcome: root activitye7
Direction: decreasee7

Verbatim

e3
“Root systems of plants grown on soil rotary tilled 20 cm deep”
✓ located verbatim in the source · abstract, characters 99–160

e7
“Na 2 CO 3 tended to increase root weights in its zone of application but reduced radiostrontium uptake about eightfold compared with uptake from similarly placed radiostrontium without Na 2 CO 3 , indicating a Na 2 CO 3 ‐induced decrease in root activity”
✓ located verbatim in the source · abstract, characters 1188–1442

Title

Profile Modification and Root Yield, Distribution, and Activity¹

Harold V. Eck; Ronald G. Davis Agronomy Journal 1971. doi:10.2134/agronj1971.00021962006300060034x

Other claims from this paper (11)

Intervention effect Deep plowing tended to decrease root yield of sudangrass.
Intervention effect Deep plowing tended to decrease root yield of sugarbeets.
Intervention effect Deep plowing tended to decrease root yield of soybeans.
Intervention effect Deep plowing had little effect on root yield of cabbage.
Association Root yields of plants decreased with depth on soil rototilled to 20 cm or moldboard plowed to 90 cm.
Intervention effect Application of 22,400 kg/ha of Na2CO3 at the 90 cm plow depth made roots of plants tend to be evenly distributed throughout the 90 cm profile.
Intervention effect Profile modification enhanced root activity of plants, as measured by top-root ratios.
Method / resource Top-root ratios are better indicators of root activity than top or root yields alone.
Observation Sr 85 uptake showed that roots in the 70 to 90 cm zone were as active as roots in the 0 to 20 cm zone.
Intervention effect Na2CO3 tended to increase root weights in its zone of application.
Intervention effect Na2CO3 reduced radiostrontium uptake by about eightfold compared with similarly placed radiostrontium without Na2CO3.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Nickel decreased oat yield in all soil series, both in grain and straw.

Taxon: oatsAvena sativat0
Organ / stage: grain and strawe2
Treatment: Nickele2
Outcome: yielde2
Direction: decreasee2
Qualifier: in all soil seriese2

Not reportedComparator

Verbatim

t0
“heavy metals on oats in a pot experiment”
✓ located verbatim in the source · title, characters 19–59

e2
“Nickel has led to a heavy yield decrease in all soil series both in grain and straw afterlight liming”
✓ located verbatim in the source · abstract, characters 499–600

Title

The effect of some heavy metals on oats in a pot experiment with three different soil types

Asbjørn Sorteberg Agricultural and Food Science 1974. doi:10.23986/afsci.71885

Other claims from this paper (17)

Intervention effect The high metal rate (250 mg/pot) of some metals induced definite to heavy yield reductions in oats.
Intervention effect Mercury induced a near complete crop failure in the sandy soil series.
Intervention effect Cadmium reduced straw yields in peat soil after both lime rates.
Intervention effect Cobalt induced some yield reduction in all soil types, most of all in clay soil after light liming.
Intervention effect Lead had no effect on oat yield size.
Intervention effect Apart from lead, the relative metal content in the crop increases very heavily with increased metal application.
Intervention effect Cadmium, nickel and cobalt content is lower at heavy liming than at light liming.
Observation Nickel content is higher in oat grain than in straw.
Observation Content of the other metals is higher in oat straw.
Observation Lead content is much higher in oat straw than in grain.
Observation The effect of heavier liming on mercury and lead uptake is equivocal.
Observation Mercury shows a characteristically low AL-soluble recovery of 1 to 2 per cent at the highest application rate.
Observation Only a small amount of applied lead exists as AL-soluble.
Observation For the other metals, the percentage recovery falls within 20—70%, lower in clay soil and higher in peat soil.
Observation Nearly all of a heavy cadmium application was recovered as AL-soluble from sandy soil at light liming.
Observation Metal content in the crop is at times essentially higher in peat and sandy soil than in clay soil.
Observation Wide variations appear between metals and soil types in the recovered amounts of applied metal.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Mg application decreased shoot yield on muddy clay.

Taxon: rye grassLoliumt0
Treatment: application of Mge0
Outcome: yield of shootse0
Direction: decreasee0
Setting: muddy clay soile0

Not reportedComparator

Verbatim

e0
“The muddy clay soil contained 137 ppm exchangeable Mg, and the application of Mg markedly increased the amount of Mg harvested in the shoots, but brought about a decrease in the yield of shoots”
✓ located verbatim in the source · abstract, characters 602–795

t0
“exhaustive cropping with perennial rye grass”
✓ located verbatim in the source · abstract, characters 93–137

Title

Magnesium-supplying power of some Finnish mineral soils

Armi Kaila; Helinä Kettunen Agricultural and Food Science 1973. doi:10.23986/afsci.72941

Other claims from this paper (9)

Intervention effect Mg application slightly increased rye grass shoot yield on sand and fine sand soils.
Intervention effect Mg application markedly increased Mg harvested in rye grass shoots on sand and fine sand soils.
Intervention effect Silty and heavy clay soils showed no response to Mg application.
Intervention effect Mg application increased Mg harvested in shoots on muddy clay.
Observation Without Mg addition, shoot Mg harvest exceeded initial exchangeable Mg only on sand and fine sand.
Observation Exchangeable Mg loss during cropping was less than shoot Mg harvest except on muddy clay.
Observation Estimated nonexchangeable Mg mobilization ranged from 0 to 60 ppm.
Observation Nonexchangeable K release was 500–1000 ppm except in sand.
Observation Exhaustion Mg was similar in order to HCl-extractable Mg in all soils.

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Selection for early flowering changed yield by 1.1 q/ha per cycle.

Taxon: corn ( Zea mays L.)Zea mayse1
Treatment: Selectione0
Outcome: yielde0
Direction: increasee0
Value: 1.1 q/hae0

Not reportedComparator

Verbatim

e0
“Selection effect per cycle averaged: 1.1 q/ha yield increase, 2.2 ears/100 p.lants increase (1‐year data), 1.6 percentage points grain moisture decrease, 2.8% stalk breakage increase, 6.1 cm plant height decrease, 4.1 cm ear height decrease, 1.7 days less to flower, and 0.4 days less silk delay.”
✓ located verbatim in the source · abstract, characters 318–614

e1
“Seven corn ( Zea mays L.) synthetics adapted to southern Iowa”
✓ located verbatim in the source · abstract, characters 0–61

Title

Selection for Early Flowering in Corn: Seven Late Synthetics

A. F. Troyer; W. L. Brown Crop Science 1976. doi:10.2135/cropsci1976.0011183x001600060007x

Other claims from this paper (16)

Intervention effect Selection for early flowering changed ears/100 p.lants by 2.2 ears/100 p.lants per cycle.
Intervention effect Selection for early flowering changed grain moisture by 1.6 percentage points per cycle.
Intervention effect Selection for early flowering changed stalk breakage by 2.8% per cycle.
Intervention effect Selection for early flowering changed plant height by 6.1 cm per cycle.
Intervention effect Selection for early flowering changed ear height by 4.1 cm per cycle.
Intervention effect Selection for early flowering changed flower by 1.7 days per cycle.
Intervention effect Selection for early flowering changed silk delay by 0.4 days per cycle.
Observation Advanced selection cycles were prolific at low density after selection against barrenness at high density.
Association Flowering date was highly heritable and responded readily to selection.
Intervention effect Selection for early flowering produced more genetic divergence than early donor breeding schemes.
Association Earlier flowering increased yield among late flowering corn.
Association Earlier flowering decreased yield among early flowering corn.
Association Earlier flowering increased yield in a short, cool season.
Association Earlier flowering decreased yield in a long, warm season.
Recommendation The authors recommend early flowering selection to adapt late corn to earlier areas.
Mechanism The authors interpret earlier flowering yield responses through grain filling period and plant size.

Mechanismhypothesisoriginal resultmeasured

Claim · model-written summary

The wheat rate of yield decrease with heterozygosity was below the lowest rate reported in maize, suggesting less dominance genetic variance in these materials.

Taxon: spring wheatTriticum aestivume0
Outcome: dominance genetic variancee1
Qualifier: less than the lowest reported in maizee1

Verbatim

e0
“Eight adapted high‐yielding spring wheat ( Triticum aestivum L.) parents”
✓ located verbatim in the source · abstract, characters 0–72

e1
“Even this maximum rate was less than the lowest reported in maize (Zea mays L.) suggesting lesser amounts of dominance genetic variance in these materials”
✓ located after whitespace/quote normalisation · abstract, characters 1467–1622

Title

Heterosis, Inbreeding, and Line Performance in Crosses of Adapted Spring Wheats¹

P. B. Cregan; R. H. Busch Crop Science 1978. doi:10.2135/cropsci1978.0011183x001800020013x

Other claims from this paper (14)

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Lower grain yield was associated with 0.4 percent sodium in upper leaves at maturity.

Taxon: SUNFLOWERHelianthus annuust0
Organ / stage: upper leavese0
Compound: Nae0
Outcome: yield of the graine0
Direction: decreasee0
Value: 0.4 percente0

Verbatim

e0
“The decrease in the yield of the grain was associated with 0.4 percent Na in the upper leaves at the time of maturity”
✓ located verbatim in the source · abstract, characters 552–669

t0
“SUNFLOWER (Helianthus annus L.)”
✓ located verbatim in the source · title, characters 91–122

Title

EFFECT OF EXCHANGEABLE SODIUM PERCENTAGE ON THE GROWTH, YIELD, AND CHEMICAL COMPOSITION OF SUNFLOWER (Helianthus annus L.)

R. CHHABRA; S. B. SINGH; I. P. ABROL Soil Science 1979. doi:10.1097/00010694-197904000-00007

Other claims from this paper (14)

Association ESP above 16 delayed sunflower germination.
Association ESP above 16 reduced plant height and stem-to-leaves ratio.
Association High ESP delayed flower-head emergence but advanced maturity.
Association High ESP advanced maturity.
Association Grain yield was significantly lower at ESP 24.8 and higher.
Association Oil content of grain fell slightly at high ESP.
Association Oil yield per hectare decreased as ESP rose.
Association Plant sodium increased with ESP.
Association Plant calcium decreased with ESP.
Association ESP had no effect on plant magnesium or phosphorus content.
Association Leaf potassium at maturity increased with ESP.
Association Zinc decreased with soil ESP.
Association Iron increased with soil ESP.
Association Manganese was unaffected by soil ESP.

Recommendationauthor interpretationoriginal resultpositivebasis n/a

Claim · model-written summary

The authors recommended compost to inhibit rice yield decline under continual direct sowing.

Taxon: riceOryza sativae0
Outcome: supply of such organic substances as composte0

Verbatim

e0
“the supply of such organic substances as compost should be necessary to inhibit the decrease of rice yield in the continual direct sowing culture”
✓ located verbatim in the source · abstract, characters 1966–2111

Title

Studies on the Causes of Rice Yield Decrease Resulting from Continual Direct Sowing Culture : III. In Relation to the nitrogen supplying potentiality of soil

Yoshimasa UEMURA; Akira MIYASAKA Japanese Journal of Crop Science 1974. doi:10.1626/jcs.43.174

Other claims from this paper (5)

Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Outer leaf fluoride critical content for 50% yield loss was about 0.05%.

Taxon: cabbage plantsBrassica oleracea var. capitatat0
Organ / stage: outer leavese0
Outcome: critical contents of Fe0
Direction: decreasee0
Value: 0.05e0
Qualifier: 50% decrease in the yielde0

Verbatim

t0
“cabbage plants”
✓ located verbatim in the source · title, characters 19–33

e0
“The critical contents of F, Cl, Dr, and I which resulted in the 50% decrease in the yield due to the excess injury were estimated to be about 0.05, 2.0, 1.5, and 0.04% on a dry basis in the outer leaves and 3.0, 1.5, 1.0, and 0.15% in the roots, respectively.”
✓ located verbatim in the source · abstract, characters 789–1048

Title

Growth response of cabbage plants to sodium halides under water culture conditions

Tetsuo Hara; Yoji Sonoda; Iwao Iwai Soil Science & Plant Nutrition 1977. doi:10.1080/00380768.1977.10433024

Other claims from this paper (15)

Observation Unamended cabbage had the highest whole plant dry weight and inner leaf yield.
Observation Unamended cabbage showed no deficiency symptoms.
Intervention effect At elevated fluoride concentrations, cabbage dry weight and yield fell and excess injury developed.
Intervention effect At elevated chloride concentrations, cabbage dry weight and yield fell and excess injury developed.
Intervention effect At elevated bromide concentrations, cabbage dry weight and yield fell and excess injury developed.
Intervention effect At elevated iodide concentrations, cabbage dry weight and yield fell and excess injury developed.
Association Increasing halides increased plant halogen contents and excess injury symptoms.
Observation Outer leaf chloride critical content for 50% yield loss was about 2.0%.
Observation Outer leaf bromide critical content for 50% yield loss was about 1.5%.
Observation Outer leaf iodide critical content for 50% yield loss was about 0.04%.
Observation Root fluoride critical content for 50% yield loss was about 3.0%.
Observation Root chloride critical content for 50% yield loss was about 1.5%.
Observation Root bromide critical content for 50% yield loss was about 1.0%.
Observation Root iodide critical content for 50% yield loss was about 0.15%.
Observation Cabbage tolerance to excess halogens ranked Cl, Dr, F, then I.

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Net assimilation rate decreased as LAI increased.

Taxon: Oil Palmt0
Treatment: increasing LAIe0
Outcome: Net assimilation ratee0
Direction: decreasee0

Verbatim

e0
“Net assimilation rate and dry matter production per palm decrease with increasing LAI”
✓ located verbatim in the source · abstract, characters 128–213

t0
“Effects of Plant Density on Growth and Yield of Oil Palm”
✓ located verbatim in the source · title, characters 0–56

Title

Effects of Plant Density on Growth and Yield of Oil Palm

R. H. V. Corley Experimental Agriculture 1973. doi:10.1017/s0014479700005639

Other claims from this paper (4)

Association Oil palm crop growth rate increased with LAI to about 40 tons/ha./yr.
Association Dry matter production per palm decreased as LAI increased.
Association Vegetative dry matter per palm was unaffected by density.
Observation Optimal LAI for oil yield was below the critical LAI for maximum crop growth rate.

“yield decrease”

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