Search claims · PlantClaims

Intervention effectauthor interpretationoriginal resultpositivebasis n/a

Claim · model-written summary

Spring fertilizer N applied to green manures could decrease N leaching loss (author interpretation).

Taxon: wheatTriticum aestivume7
Treatment: spring applications of fertilizer Ne7
Outcome: leaching losse7
Direction: decreasee7
Comparator: green manurese7

Verbatim

e7
“Supplementing green manures with spring applications of fertilizer N could decrease the leaching loss without decreasing wheat yield”
✓ located verbatim in the source · abstract, characters 1618–1750

Title

Green manure as a nitrogen source for wheat in the southeastern United States

Julia B. Nelson; Larry D. King American Journal of Alternative Agriculture 1996. doi:10.1017/s0889189300007050

Other claims from this paper (7)

Intervention effect Wheat yield with green manure only was lower than yield with 90 kg N/ha (about 65%).
Intervention effect Wheat yield with green manure plus 45 or 90 kg N/ha did not differ from yield with 90 kg N only.
Observation Soil inorganic N to a depth of 30 cm declined from as high as 40 kg/ha in fall to less than 10 kg/ha in spring during the first year.
Intervention effect Fertilizer N gave a greater potential for N leaching than green manure.
Observation An average of 80% of white clover N was recovered as soil inorganic N in a laboratory incubation at 10 °C.
Observation Field recovery of clover N (soil inorganic N plus N in wheat biomass) was only 21%.
Intervention effect Spring fertilizer N supplementation of green manures did not decrease wheat yield (author interpretation).

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Decreasing spacing decreased yield per plant in 1990.

Taxon: basilOcimum basilicumt0
Treatment: A decrease of in-row plant spacinge0
Outcome: yield per plante0
Direction: decreasede0

Not reportedComparator

Verbatim

e0
“A decrease of in-row plant spacing decreased yield per plant in 1990, but not in 1989”
✓ located verbatim in the source · abstract, characters 561–646

t0
“Basil”
✓ located verbatim in the source · title, characters 48–53

Title

In-Row Plant Spacing and Yields of Fresh-Market Basil

Jeanine M. Davis Journal of Herbs Spices & Medicinal Plants 1993. doi:10.1300/j044v02n01_05

Other claims from this paper (3)

Intervention effect In 1989, 20 cm spacing gave the highest sweet basil yield per meter of row.
Intervention effect In 1989, yield per plant did not differ across spacings of 20 to 51 cm.
Intervention effect Decreasing spacing did not decrease yield per plant in 1989.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Fruit yield sharply decreased from the second to third July cut.

Taxon: red raspberryRubus idaeust0
Treatment: third datee0
Outcome: fruit yielde0
Direction: decreasee0
Comparator: seconde0

Verbatim

e0
“a sharp decrease in fruit yield from the second to the third date.”
✓ located verbatim in the source · abstract, characters 786–852

t0
“Red Raspberry”
✓ located verbatim in the source · title, characters 44–57

Title

Off-season Production of Primocane-fruiting Red Raspberry Using Summer Pruning and Polyethylene Tunnels

Pedro B. Oliveira; Cristina M. Oliveira; Luís Lopes-da-Fonseca; et al. HortScience 1996. doi:10.21273/hortsci.31.5.805

Other claims from this paper (13)

Intervention effect August shoot cutting delayed fruit harvest until February and April.
Intervention effect The August cuts produced weak shoot growth.
Intervention effect The first August cut yielded 4.8 g/cane.
Intervention effect The second August cut yielded 2.1 g/cane.
Intervention effect July cutting delayed harvest to October through January.
Intervention effect Cutting on 2 July yielded 63.5 g/cane.
Intervention effect Cutting on 16 July yielded 52.8 g/cane.
Intervention effect Cutting on 31 July yielded 26.5 g/cane.
Intervention effect Cane height and node counts differed little among the three July cutting dates.
Intervention effect Leaf area per cane decreased from the first to third July cut.
Intervention effect Shoot growth was less affected than yield when cutting was delayed until late July.
Observation Fruit quality always met acceptable standards.
Recommendation Summer cutting was found practicable for protected off-season raspberry production in mild winter climates.

Mechanismauthor interpretationoriginal resultnegativemeasured

Claim · model-written summary

Limited nitrogen availability lowered grain protein more than grain yield.

Taxon: Wintergetreidet0
Outcome: grain protein contente0
Direction: decreasee0
Qualifier: Limited N availabilitye0
Comparator: grain yielde0

Verbatim

e0
“Limited N availability causes a decrease in grain protein content rather than in grain yield.”
✓ located verbatim in the source · abstract, characters 1332–1425

t0
“Wintergetreide”
✓ located verbatim in the source · title, characters 27–41

Title

Die Ertragsentwicklung von Wintergetreide und Zuckerrüben bei dauerhafter Senkung des N‐Düngungsniveaus

K.‐W. Becker; A. Bruss Journal of Agronomy and Crop Science 1996. doi:10.1111/j.1439-037x.1996.tb00254.x

Other claims from this paper (13)

Intervention effect Crop yield and quality after 6–8 years of reduced nitrogen were similar to those after one year.
Intervention effect Without nitrogen, winter wheat grain yield fell to about 60% of the locally recommended dressing yield.
Intervention effect Without nitrogen, winter barley grain yield fell to about 60% of the locally recommended dressing yield.
Intervention effect Without nitrogen, white sugar yield remained at 90% of the local normal yield.
Association Yields declined slightly as the trials continued.
Observation Cereal and beet yields remained stable within each nitrogen level after six years.
Observation Unfertilized winter wheat grain contained 1.5–1.7% nitrogen.
Observation Unfertilized winter barley grain contained 1.0–1.6% nitrogen.
Observation Grain nitrogen content stayed constant during six years.
Observation Annual nitrogen export remained at 55–91 kg N/ha.
Observation Sugar beet had the highest annual nitrogen export, at 74–117 kg N/ha in the beet body.
Association Location differences in nitrogen export were not explained by soil quality.
Mechanism Sustained high yield without fertilizer may reflect nitrogen fixation, atmospheric deposition and soil nitrogen depletion.

Mechanismobservedoriginal resultnegativemeasured

Claim · model-written summary

Marketable fruit yield declined with lower total yield and more small and abnormal fruits.

Taxon: TomatoSolanum lycopersicumt0
Outcome: marketable FYe1
Qualifier: decrease in total FY and the increase in small and abnormal (cracked and rot) fruitse1

Verbatim

t0
“Tomato Plants”
✓ located verbatim in the source · title, characters 51–64

e1
“Decrease in marketable FY was attributed to both the decrease in total FY and the increase in small and abnormal (cracked and rot) fruits”
✓ located verbatim in the source · abstract, characters 550–687

Title

Growth, Yield, and Water Consumption of Greenhouse Tomato Plants as Affected by High Electrical Conductivity of Nutrient Solution and Low Water Content in Substrate

Hui-lian Xu; Laurent Gauthier; André Gosselin HortScience 1995. doi:10.21273/hortsci.30.4.837e

Other claims from this paper (14)

Intervention effect High conductivity reduced dry matter production and fruit yield significantly.
Intervention effect Low substrate water content reduced dry matter production and fruit yield significantly.
Intervention effect High conductivity lowered fruit harvest index.
Intervention effect Low substrate water content lowered fruit harvest index.
Intervention effect High conductivity reduced photosynthesis and leaf water potential.
Intervention effect Low substrate water content reduced photosynthesis and leaf water potential.
Intervention effect High conductivity increased chlorophyll content and respiration under both water regimes.
Intervention effect High conductivity decreased whole plant and leaf area based water consumption.
Intervention effect Low substrate water content decreased whole plant and leaf area based water consumption.
Intervention effect High conductivity depressed leaf water potential and transpiration especially at midday.
Intervention effect Low substrate water content depressed leaf water potential and transpiration especially at midday.
Association Fruit yield correlated positively with water consumption.
Observation High conductivity and low water content had additive effects on most variables.
Mechanism Authors propose that lower leaf water potential may explain lower water use, photosynthesis and yield.

Associationobservedoriginal resultno effectmeasured

Claim · model-written summary

With blocked virus migration or multiplication, maize grain yield barely decreased.

Taxon: maizeZea mayst0
Interactor: PAVt0pathogen
Outcome: grain yielde0
Direction: almost no decreasee0

Verbatim

e0
“there was almost no decrease in grain yield”
✓ located verbatim in the source · abstract, characters 1061–1104

t0
“Maize Crop Yield Losses Due to Barley Yellow Dwarf Virus‐PAV Luteovirus”
✓ located verbatim in the source · title, characters 17–88

Title

Irrigated Hybrid Maize Crop Yield Losses Due to Barley Yellow Dwarf Virus‐PAV Luteovirus

M. Beuve; B. Naïbo; L. Foulgocq; et al. Crop Science 1999. doi:10.2135/cropsci1999.3961830x

Other claims from this paper (11)

Observation The two PAV isolates multiplied similarly to wild isolates in maize hybrid leaves.
Observation PAV was detected in maize leaves during the same postinoculation period in two of three years.
Observation Under high temperatures, PAV remained in maize roots for long periods.
Association Blocked PAV migration or multiplication was accompanied by less maize reddening.
Intervention effect High early PAV leaf infection reduced maize hybrid plant height by less than 10%.
Intervention effect High early PAV infection lowered maize grain yield by 15 to 20%.
Mechanism The yield loss reflected fewer maize kernels per ear.
Observation PAV infection did not change thousand-kernel mass.
Observation Maize yield loss did not vary with virus isolate or hybrid.
Observation PAV symptom intensity differed between maize hybrids.
Recommendation The authors recommend establishing a maize breeding program in response to potential PAV yield losses.

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Head rice yield tended to decline with increasing uneven emergence in 1989.

Taxon: riceOryza sativae0
Treatment: uneven emergence levelse0
Outcome: head rice yieldse0
Direction: decreasee0
Qualifier: In 1989e0

Verbatim

e0
“In 1989, there was a trend for head rice yields to decrease as uneven emergence levels increased”
✓ located verbatim in the source · abstract, characters 1204–1300

Title

Effect of uneven emergence on rice yield, milling yield, and yield components

KA Gravois; RS Helms Australian Journal of Experimental Agriculture 1994. doi:10.1071/ea9940949

Other claims from this paper (7)

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

The highest nitrogen rate produced the largest decrease in grape soluble solids.

Taxon: GrapevinesVitist0
Treatment: 112 kg N/hae0
Outcome: soluble solidse1
Direction: largest decreasee0
Comparator: C0e1

Verbatim

e0
“with the highest rate (112 kg N/ha) resulting in the largest decrease”
✓ located verbatim in the source · abstract, characters 2106–2175

e1
“soluble solids over C0”
✓ located verbatim in the source · abstract, characters 2054–2076

t0
“Grapevines”
✓ located verbatim in the source · title, characters 108–118

Title

Effect of Nitrogen Fertilizer Timing and Rate on Inorganic Nitrogen Status, Fruit Composition, and Yield of Grapevines

L. Peter Christensen; Mary L. Bianchi; William L. Peacock; et al. American Journal of Enology and Viticulture 1994. doi:10.5344/ajev.1994.45.4.377

Other claims from this paper (17)

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

NR mutants had 27 to 73% lower grain yield than original cultivars.

Taxon: RiceOryza sativat0
Material: mutantse0
Outcome: grain yielde0
Direction: decreasee0
Value: 27 to 73%e0
Comparator: original cultivarse0

Verbatim

e0
“A decrease of 27 to 73% in grain yield was observed in mutants relative to original cultivars.”
✓ located verbatim in the source · abstract, characters 1365–1459

t0
“Rice”
✓ located verbatim in the source · title, characters 32–36

Title

Nitrate Reductase Activities in Rice Genotypes in Irrigated Lowlands

Edward A. Barlaan; Hiroyuki Sato; Masahiko Ichii Crop Science 1998. doi:10.2135/cropsci1998.0011183x003800030019x

Associationobservedoriginal resultno effectmeasured

Claim · model-written summary

The conventional-to-reduced pressure yield ratio was not reported to decrease with increasing rain.

Taxon: perennial ryegrassLolium perennet0
Outcome: C 2 /R 2e0
Setting: 14 d after first mowinge0

Not reportedDirection

Verbatim

e0
“C 2 /Z 2 , but not C 2 /R 2 , decreased with increasing amount of rainfall in the 14 d after first mowing”
✓ located verbatim in the source · abstract, characters 733–838

t0
“perennial ryegrass”
✓ located verbatim in the source · title, characters 52–70

Title

Soil compaction effects on second‐harvest yields of perennial ryegrass for silage

J. T. Douglas Grass and Forage Science 1997. doi:10.1111/j.1365-2494.1997.tb02343.x

Other claims from this paper (5)

“yield decrease”

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