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“yield decrease”

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plus 31 earlier · 1910s–1940s

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Associationauthor interpretationoriginal resultnegativemeasured

Claim · model-written summary

Sodium concentrations above 10 meq/liter appeared to reduce bean yield.

Taxon: Beanst0
Treatment: Sodium concentrations greater than 10 meq/litere0
Outcome: yielde0
Direction: decreasee0

Verbatim

e0
“Sodium concentrations greater than 10 meq/liter appeared to decrease the yield of both plants”
✓ located verbatim in the source · abstract, characters 548–641

t0
“Beans”
✓ located verbatim in the source · title, characters 74–79

Title

Effect of H2SO4 in High Sodium Irrigation Water on the Growth of Peas and Beans in Calcareous Soil¹

J. Ryan; S. Miyamoto; H. L. Bohn Agronomy Journal 1973. doi:10.2134/agronj1973.00021962006500060047x

Other claims from this paper (9)

Intervention effect Up to 4 meq/liter H 2 SO 4 had no significant effect on pea growth at 1 to 40 meq/liter NaCl.
Intervention effect Up to 4 meq/liter H 2 SO 4 had no significant effect on bean growth at 1 to 40 meq/liter NaCl.
Intervention effect Sulfuric acid adversely affected pea growth at 60 and 80 meq/liter NaCl.
Intervention effect Sulfuric acid adversely affected bean growth at 60 and 80 meq/liter NaCl.
Association Sodium concentrations above 10 meq/liter appeared to reduce pea yield.
Association Plant sodium content increased as irrigation-water sodium increased.
Intervention effect Sulfuric acid did not reduce plant sodium content.
Observation Plant calcium content was unaffected.
Recommendation Acidifying high-sodium irrigation water was ineffective over the studied sulfuric acid range.

Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Early-season Westbred yield declined only with twelve days of deflowering.

Taxon: cowpeaVigna unguiculatat0
Material: Westbrede0
Treatment: defloweringe0
Outcome: seed yielde0
Direction: did not decreasee0
Qualifier: unless repeated for 12 dayse0

Not reportedComparator

Verbatim

e0
“deflowering of Westbred did not decrease the seed yield unless repeated for 12 days”
✓ located verbatim in the source · abstract, characters 511–594

t0
“cowpea”
✓ located verbatim in the source · title, characters 83–89

Title

Effect of continuous removal of open flowers on the seed yield of two varieties of cowpea, Vigna unguiculata (L.) Walp.

O. Ojeaga Ojehomon The Journal of Agricultural Science 1970. doi:10.1017/s0021859600023017

Other claims from this paper (5)

Intervention effect Deflowered cowpea opened more flowers than untreated plants.
Observation Most extra flowers dropped prematurely.
Intervention effect Deflowering up to nine days did not decrease Adzuki seed yield in greenhouse or irrigated plots.
Intervention effect Deflowering up to nine days did not decrease Westbred seed yield in greenhouse or irrigated plots.
Intervention effect All deflowering periods reduced Adzuki seed yield, with the longest period lowest.

Intervention effectobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

Irrigation did not significantly change yields in subsoiled plots.

Taxon: soybeanGlycine maxt0
Treatment: irrigated, subsoiled plotse0
Outcome: yielde0
Direction: No significant yield increase or decreasee0

Not reportedComparator

Verbatim

e0
“No significant yield increase or decrease was observed for the irrigated, subsoiled plots, regardless of the date irrigation began.”
✓ located verbatim in the source · abstract, characters 1363–1494

t0
“Soybean”
✓ located verbatim in the source · title, characters 34–41

Title

Irrigation and Tillage Effects on Soybean Yield in a Coastal Plain Soil¹

C. K. Martin; D. K. Cassel; E. J. Kamprath Agronomy Journal 1979. doi:10.2134/agronj1979.00021962007100040017x

Other claims from this paper (6)

Observation Without irrigation, conventionally tilled soybean yielded 1,728 kg/ha.
Observation Conventional tillage with irrigation begun 23 June yielded 2,063 kg/ha.
Observation Conventional tillage with irrigation begun 29 July yielded 2,124 kg/ha.
Observation Conventional tillage with irrigation begun 29 September yielded 1,686 kg/ha.
Intervention effect Subsoiling raised mean yield 37% over conventional tillage.
Mechanism Authors infer benefits of subsoiling and bedding beyond water availability.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Dry matter yield declined in the metal ranking Ni, Co, Zn, Mn, Cu.

Taxon: plantsViridiplantaee0
Treatment: These treatmentse0
Outcome: dry matter yielde0
Direction: decreasee0

Not reportedComparator

Verbatim

e0
“These treatments caused a decrease in dry matter yield of plants in the order Ni 2+ > Co 2+ > Zn 2+ > Mn 2+ > Cu 2+ .”
✓ located verbatim in the source · abstract, characters 388–505

Title

Relative effectiveness of certain heavy metals in producing toxicity and symptoms of iron deficiency in barley

S. C. Agarwala; S. S. Bisht; C. P. Sharma Canadian Journal of Botany 1977. doi:10.1139/b77-151

Other claims from this paper (9)

Intervention effect Excess Mn, Cu, Zn, Co and Ni accumulated in barley shoots and especially roots.
Intervention effect Metals induced distinct visual symptoms ranked Ni, Co, Cu, Mn, Zn.
Intervention effect Each excess metal reduced iron absorption and changed root shoot distribution.
Intervention effect Excess Co, Cu, Mn and Zn reduced iron translocation, induced chlorosis and decreased catalase.
Intervention effect Excess nickel did not inhibit iron translocation to young leaves.
Intervention effect Excess nickel did not decrease catalase activity.
Intervention effect Excess nickel stimulated peroxidase activity.
Intervention effect Each excess metal increased nonreducing sugar concentration.
Mechanism The authors infer metal toxicity does not necessarily depend on iron deficiency, redox potential or complex stability.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Dinoseb decreased yield of four hybrids by 6 to 8% at one location in 1975.

Taxon: CornZea mays subsp. mayst0
Material: four hybridse0
Treatment: Dinosebe0
Outcome: yielde0
Direction: decreasee0
Value: 6 to 8%e0
Qualifier: at one location in 1975e0

Not reportedComparator

Verbatim

e0
“Dinoseb applied to four hybrids at one location in 1975 caused a 6 to 8% yield decrease”
✓ located verbatim in the source · abstract, characters 555–642

t0
“Corn”
✓ located verbatim in the source · title, characters 12–16

Title

Response of Corn to Low‐Rate Foliar Sprays of Dinoseb¹

R. R. Johnson; G. E. McKibben; R. G. Jeppson; et al. Agronomy Journal 1978. doi:10.2134/agronj1978.00021962007000040024x

Other claims from this paper (5)

Intervention effect Dinoseb increased barrenness by 1 to 2% in four hybrids at one location in 1975.
Association Nubbin ears increased in association with yield loss.
Intervention effect Synthetic line yield increased 4% at 12.4 and 24.7 g/ha dinoseb in 1976.
Intervention effect A commercial hybrid in the same trials was not affected by dinoseb.
Intervention effect Dinoseb both increased and decreased second ear formation at similar rates.

Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Low-temperature seed-yield loss arose mainly from reduced pod number or setting and fertile-seed percentage.

Taxon: soybeansGlycine maxt0
Organ / stage: pode0
Outcome: seed yielde0
Direction: decreasee0

Verbatim

e0
“The major sources of decrease in seed yield were the decrease in the pod number, or pod setting rate, and the fertile seed percentage, but the statistical difference among fertilizers was only obtained in the pod number, or the pod setting rate.”
✓ located verbatim in the source · abstract, characters 1148–1393

t0
“soybeans”
✓ located verbatim in the source · title, characters 106–114

Title

Studies on Cool Injury in Bean Plants : IV. Effects of nitrogenous fertilizers on the growth and yield of soybeans as subjected to low temperature from early to mid-reproductive stage

Koji HASHIMOTO; Tadashi YAMAMOTO Japanese Journal of Crop Science 1973. doi:10.1626/jcs.42.475

Other claims from this paper (13)

Observation Fertilizers differed statistically in pod number or setting rate.
Intervention effect Cold injury was least with farmyard manure and greatest with CDU.
Intervention effect Farmyard manure produced the highest total seed weight across cool treatments and control.
Intervention effect The four other slowly available nitrogen fertilizers exceeded high and standard ammonium sulfate for seed weight.
Intervention effect Leaf and stem weights at maturity were highest with farmyard manure.
Observation Nonnodulating soybean responded strongly to nitrogen fertilization in growth and yield, with a response trend contrasting with the nodulating line.
Intervention effect Slowly available nitrogen treatments produced about 30% less dry matter than high ammonium sulfate in the nonnodulating line.
Observation High manure nitrogen did not significantly depress fixation during development in nodulated soybean.
Intervention effect Farmyard manure again gave stable, high seed weight over three cool-exposure stages and control.
Intervention effect The 80% CDU and 20% ammonium sulfate mixture, with or without humate or oat straw, had seed yield as high as manure and above ammonium sulfate treatments.
Intervention effect Adding humate or oat straw increased 100-seed weight.
Intervention effect Adding humate or oat straw did not increase total seed weight.
Intervention effect Humate or oat straw depressed vegetative growth and tended to decrease flower number.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Irrigation of the three alfalfa varieties decreased overall yield by 76% at the last harvest.

Taxon: alfalfaMedicago sativae0
Material: three alfalfa varietiese0
Treatment: Irrigatione0
Outcome: yielde0
Direction: decreasee0
Value: 76%e0
Comparator: nonirrigated plantse1

Verbatim

e0
“Irrigation of the three alfalfa varieties resulted in an overall decrease in yield of 76% at the last harvest”
✓ located verbatim in the source · abstract, characters 945–1054

e1
“The nonirrigated plants received natural precipitation”
✓ located verbatim in the source · abstract, characters 378–432

Title

Influence of Irrigation on the Yield and Persistence of Forage Legumes¹

Hashim A. Wahab; Douglas S. Chamblee Agronomy Journal 1972. doi:10.2134/agronj1972.00021962006400060002x

Other claims from this paper (8)

Intervention effect Supplemental water gave superior growth of all legumes at the first harvest after irrigation in the first year.
Intervention effect Irrigation increased ladino clover yield by approximately 19%.
Intervention effect Alfalfa yields were sharply reduced as a result of irrigation.
Intervention effect Most of the crownvetch stand was lost after the first cut on irrigated plots.
Mechanism Severe disease infestation was probably a primary factor in the stand loss and low yields of alfalfa and crownvetch under irrigation.
Mechanism Excessive soil moisture after irrigation possibly contributed to alfalfa stand loss.
Observation Alfalfa varieties responded differently to irrigation.
Observation The benefits of irrigation to some species and varieties ended at the first harvest.

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Greater infection severity decreased gross sucrose yield, yield components and purity.

Taxon: sugarbeetBeta vulgaris subsp. vulgarise1
Treatment: increasing severity of C. beticola infectione0
Interactor: C. beticolaCercospora beticolae0pathogen
Outcome: gross sucrose yield, yield components, and puritye0
Direction: decreasee0

Verbatim

e0
“With increasing severity of C. beticola infection there was a general increase in nonsucrose chemical components, and decrease in gross sucrose yield, yield components, and purity.”
✓ located verbatim in the source · abstract, characters 866–1046

e1
“sugarbeet ( Beta vulgaris L.)”
✓ located verbatim in the source · abstract, characters 37–66

Title

Differential Response of Sugarbeet Cultivars to Cercospora Leaf Spot Disease¹

G. A. Smith; S. S. Martin Crop Science 1978. doi:10.2135/cropsci1978.0011183x001800010011x

Other claims from this paper (4)

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

In some experiments, lower yield after defoliation was associated with slightly lower plant population.

Taxon: maizeZea mayst0
Treatment: defoliatione0
Outcome: grain yieldse0
Direction: lowere0
Qualifier: a slight decrease in plant populatione0

Verbatim

e0
“In some experiments lower grain yields from defoliation were associated with a slight decrease in plant population”
✓ located verbatim in the source · abstract, characters 877–991

t0
“Maize”
✓ located verbatim in the source · title, characters 20–25

Title

Growth and Yield of Maize as Affected by Early‐Season Defoliation¹

R. R. Johnson Agronomy Journal 1978. doi:10.2134/agronj1978.00021962007000060026x

Other claims from this paper (7)

Intervention effect Five-leaf defoliation reduced mean grain yield by 10 to 13% across maturity classes.
Intervention effect Defoliation reduced plant height, leaf number and leaf area.
Intervention effect Defoliation reduced percentage grain protein.
Intervention effect Defoliation delayed pollen shed and silking.
Intervention effect Defoliation did not change the pollen shed to silking interval.
Mechanism Reduced ear size was identified as the primary cause of yield losses after defoliation.
Mechanism The authors suggest reduced leaf area lowered photosynthate supply and ear weight.

Associationobservedoriginal resultpositivemeasured

Claim · model-written summary

Maldwyn grain yield fell 9·2% in unsprayed plots.

Taxon: oatsAvena sativat0
Material: Maldwyne0
Outcome: grain yielde0
Direction: decreasee0
Value: 9·2%e0
Comparator: sprayed plotse1

Verbatim

e0
“Maldwyn, with only 7·9% mildew cover in the unsprayed plots due to its resistance, suffered a decrease of only 9·2% in grain yield”
✓ located verbatim in the source · abstract, characters 858–988

e1
“unsprayed plots were compared with the sprayed plots”
✓ located verbatim in the source · abstract, characters 614–666

t0
“oats”
✓ located verbatim in the source · title, characters 65–69

Title

The effect on grain yield of adult plant resistance to mildew in oats

I. T. JONES Annals of Applied Biology 1977. doi:10.1111/j.1744-7348.1977.tb01840.x

Other claims from this paper (8)

Association Low mildew lines yielded substantially more grain than high mildew lines in unsprayed field plots.
Association Low and high mildew lines yielded similarly in tridemorph-sprayed plots.
Association Low mildew lines had very small yield losses in unsprayed versus sprayed plots.
Association High mildew lines usually had very large grain yield losses.
Observation Resistant Maldwyn had 7·9% mildew cover.
Association Milford grain yield loss was 17·1%.
Association Sun II grain yield loss was 20·3%.
Observation Some lines and cultivars tolerated heavy mildew without corresponding yield loss.

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“yield decrease”

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