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“yield decrease”

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1950 ’60 ’70 ’80 ’90 2000 ’10 ’20

plus 6 earlier · 1930s–1940s

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Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Heavy fertilization prevented a marked vegetable yield decrease in raw subsoil.

Taxon: vegetable cropse0
Treatment: heavily fertilizede0
Outcome: yieldse0
Direction: did not decrease remarkablye0

Not reportedComparator

Verbatim

e0
“the yields of vegetable crops did not decrease remarkably in the raw subsoil when it was heavily fertilized”
✓ located verbatim in the source · abstract, characters 1503–1610

Title

The effect of deep plowing on growth and yield of vegetable crops

H. OHTA; T. KODAMA; K. WATANABE Journal of the Japanese Society for Horticultural Science 1962. doi:10.2503/jjshs.31.315

Other claims from this paper (11)

Intervention effect Deep plowing favored growth and yield of most vegetable crops.
Intervention effect Heavy fertilizer application made deep plowing more effective.
Intervention effect Raw subsoil was unfavorable to cereal and forage crop growth and yield.
Observation Most heavily fertilized vegetable crops were relatively insensitive to subsoil inhibition.
Intervention effect Frost-exposed, heavily fertilized subsoil supported excellent vegetable growth and yield.
Intervention effect Poor subsoil inhibited growth of most vegetables in pots.
Intervention effect Fertile subsoil with heavy fertilizer supported vigorous growth of most vegetables in pots.
Intervention effect Some crops grew better in subsoil than topsoil with the same fertilizer amount.
Association High yielding crops under deep plowing were less affected by poor subsoil nutrition.
Association Sensitivity to aluminum toxicity and nutrient deficiency was suggested to relate to subsoil adaptation.
Mechanism Good soil aeration after deep plowing was linked to root development and active nutrient uptake.

Associationobservedoriginal resultpositivemeasured

Claim · model-written summary

For the lower-yielding group, each 1% decrease in borer infestation corresponded to 17 lb. greater grain yield.

Taxon: MAIZEZea mayst0
Interactor: BUSSEOLA FUSCABusseola fuscat0peste0
Outcome: 17 lb. increasee0
Direction: increasee0
Value: 17 lb.e0
Qualifier: lowere0

Verbatim

e0
“17 lb. increase per 1% decrease for the lower”
✓ located verbatim in the source · abstract, characters 811–856

t0
“BUSSEOLA FUSCA, AND YIELD OF MAIZE”
✓ located verbatim in the source · title, characters 53–87

Title

THE RELATION BETWEEN INFESTATION BY THE STALK BORER, BUSSEOLA FUSCA, AND YIELD OF MAIZE IN EAST AFRICA

P. T. WALKER Annals of Applied Biology 1960. doi:10.1111/j.1744-7348.1960.tb03579.x

Other claims from this paper (1)

Association For the high-yielding group, each 1% decrease in borer infestation corresponded to 35 lb./acre greater grain yield.

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Zinc applied to canes during the dormant season offset the superphosphate-related yield decrease.

Taxon: sultana vinese0
Treatment: application of zinc to canes during the dormant seasone5
Outcome: decreasee5
Direction: offsete5

Not reportedComparator

Verbatim

e0
“Zinc foliage sprays increased the yield of dried fruit of sultana vines on two light-textured alkaline soils in the Mildura area”
✓ located verbatim in the source · abstract, characters 0–128

e5
“The application of zinc to canes during the dormant season offset this decrease but had no effect on vines not receiving superphosphate”
✓ located verbatim in the source · abstract, characters 452–587

Title

Yield responses by sultanas to applications of zinc and superphosphate

DMcE Alexander; RC Woodham Australian Journal of Experimental Agriculture and Animal Husbandry 1964. doi:10.1071/ea9640169

Other claims from this paper (6)

Intervention effect Zinc foliage sprays increased dried fruit yield of sultana vines on two alkaline soils in the Mildura area.
Observation Neither sultana vineyard showed zinc deficiency symptoms.
Mechanism Yield increases with zinc application were mainly due to better setting.
Observation The yield increase from zinc occurred in the season of application.
Intervention effect Superphosphate depressed yields in three of seven years after 19 years of heavy annual dressings at one site.
Intervention effect Zinc applied to canes during the dormant season had no effect on vines not receiving superphosphate.

Associationobservedoriginal resultpositivemeasured

Claim · model-written summary

For the high-yielding group, each 1% decrease in borer infestation corresponded to 35 lb./acre greater grain yield.

Taxon: MAIZEZea mayst0
Interactor: BUSSEOLA FUSCABusseola fuscat0peste0
Outcome: grain yielde0
Direction: increasee0
Value: 35 lb./acree0
Qualifier: higher yielding groupe0

Verbatim

e0
“a 35 lb./acre increase in grain yield for every 1% decrease in infestation for the higher yielding group”
✓ located verbatim in the source · abstract, characters 701–805

t0
“BUSSEOLA FUSCA, AND YIELD OF MAIZE”
✓ located verbatim in the source · title, characters 53–87

Title

THE RELATION BETWEEN INFESTATION BY THE STALK BORER, BUSSEOLA FUSCA, AND YIELD OF MAIZE IN EAST AFRICA

P. T. WALKER Annals of Applied Biology 1960. doi:10.1111/j.1744-7348.1960.tb03579.x

Other claims from this paper (1)

Association For the lower-yielding group, each 1% decrease in borer infestation corresponded to 17 lb. greater grain yield.

Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Peking-type showed much higher resistance by white cyst number, nodulation and yield decrease than Gedenshirazu-type.

Taxon: SOYBEANGlycine maxt0
Material: "Peking"-typee1
Interactor: SOYBEAN CYST NEMATODEHeterodera glycinest0pathogen
Outcome: resistance in number of white cysts, nodulation and yield decreasee0
Direction: highere0
Comparator: "Gedenshirazu"-typee1

Verbatim

e0
“The former expressed by far the higher resistance in number of white cysts, nodulation and yield decrease than the latter.”
✓ located verbatim in the source · abstract, characters 280–402

e1
“"Peking"-type and "Gedenshirazu"-type”
✓ located verbatim in the source · abstract, characters 224–261

t0
“SOYBEAN VARIETIES TO THE SOYBEAN CYST NEMATODE”
✓ located verbatim in the source · title, characters 29–75

Title

STUDIES ON THE RESISTANCE OF SOYBEAN VARIETIES TO THE SOYBEAN CYST NEMATODE. : I. Comparison of Varietal Responses.

Shintaro Sugiyama; Katsumi Hiroma Ikushugaku zasshi 1968. doi:10.1270/jsbbs1951.18.80

Other claims from this paper (1)

Observation Soybean varieties were classified into Peking-type and Gedenshirazu-type resistance.

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Decreasing potato spacing tended to increase total yield.

Taxon: potatoSolanum tuberosumt0
Treatment: decrease in spacing distancee0
Outcome: Total yielde0
Direction: increasee0

Not reportedComparator

Verbatim

e0
“Total yield tended to increase with decrease in spacing distance”
✓ located verbatim in the source · abstract, characters 762–826

t0
“potato agronomy”
✓ located verbatim in the source · title, characters 11–26

Title

Studies in potato agronomy. I. The effects of variety, seed size and spacing on growth, development and yield

P. M. Bremner; M. A. Taha The Journal of Agricultural Science 1966. doi:10.1017/s0021859600062651

Other claims from this paper (6)

Observation Majestic had greater total tuber yield than King Edward in both years.
Observation Majestic had greater ware yield than King Edward in both years.
Observation Majestic had a longer tuber bulking period associated with earlier initiation in 1959 and earlier initiation and persistence in 1960.
Intervention effect Large potato seed outyielded small seed, although the difference was relatively small, especially for ware yield.
Intervention effect Ware yield rose when potato spacing decreased from 24 to 18 inches.
Intervention effect Potato ware yield differed little between 12 and 18 inch spacing.

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Field germination of kernels increased more in Barberton than in Ashford with delay in harvest and decrease in plant population.

Taxon: GroundnutsArachis hypogaeat0
Material: Barbertone4
Treatment: delay in harvest and with decrease in plant populatione4
Outcome: Field germination of kernelse4
Direction: increasede4
Comparator: Ashforde4

Verbatim

t0
“Yield and Quality of Groundnuts in the Sudan Gezira”
✓ located verbatim in the source · title, characters 30–81

e4
“Field germination of kernels increased more in Barberton with delay in harvest and with decrease in plant population than in Ashford”
✓ located verbatim in the source · abstract, characters 701–833

Title

Agronomic Factors Influencing Yield and Quality of Groundnuts in the Sudan Gezira

W. M. Tahir; M. S. Misovic Experimental Agriculture 1967. doi:10.1017/s0014479700004099

Other claims from this paper (11)

Intervention effect Ashford outyielded Barberton at the lower densities.
Intervention effect The best pod yields were obtained at day 125 harvest at a population of 55,000–60,000 plants per acre.
Intervention effect A higher plant population depressed the pod yield of Ashford.
Intervention effect A higher plant population did not significantly change the pod yield of Barberton.
Intervention effect Mean pod and kernel weights and shelling out-turn of Barberton increased with delay in harvest.
Association Barberton had higher oil content and shelling out-turn than Ashford.
Association Barberton had a lower proportion of pods with single kernels than Ashford.
Association The highest plant population gave Barberton the best oil content in early harvests.
Association Arrangement of plants within rows at similar populations had only small effects.
Intervention effect Planting single kernels at close spacing (7·5 cm.) improved nut quality in Barberton.
Intervention effect Planting two kernels at wide spacing (15·0 cm.) improved nut quality in Ashford.

Mechanismauthor interpretationoriginal resultpositivemeasured

Claim · model-written summary

The increase in oil of safflower seed is attributed to the decrease in hull.

Taxon: safflowerCarthamus tinctoriuse0
Outcome: increase in oile7
Qualifier: due to the decrease in hulle7

Verbatim

e0
“Three contrasting safflower varieties”
✓ located verbatim in the source · abstract, characters 0–37

e7
“The increase in oil was due to the decrease in hull”
✓ located verbatim in the source · abstract, characters 984–1035

Title

EFFECT OF DATE OF -PLANTING AND HEAD POSITION ON YIELD, OIL, PROTEIN, AND HULL CONTENT IN SAFFLOWER (CARTHAMUS TINCTORIUS L.)

Leslie Dewayne Massman UA Campus Repository (The University of Arizona) 1968

Other claims from this paper (17)

Intervention effect Highest seed, oil and protein yield was obtained by planting on January 2 or earlier in safflower.
Intervention effect Hull content increased with later planting dates in safflower.
Association Hull content was inversely related to oil content in safflower seed.
Intervention effect Protein content of the seed increased with later planting dates in safflower.
Association Protein content of the seed was inversely related to oil content in safflower.
Intervention effect Weight per 100 seeds decreased with later planting dates in safflower.
Association Weight per 100 seeds was inversely related to bushel weight in safflower.
Intervention effect Plant height of safflower decreased after the January 16 planting.
Intervention effect From primary to subsequent head positions, hull percentage of the seed decreased in safflower.
Association Hull percentage of the seed was inversely related to oil percentage across head positions in safflower.
Intervention effect Protein percentage was unchanged from primary to subsequent head positions in safflower.
Intervention effect Hull content tended to increase with later flowering dates in safflower.
Intervention effect Oil content of the seed decreased with later flowering dates in safflower.
Intervention effect Protein content increased with later flowering dates in safflower.
Intervention effect Neither oil nor protein content of the meats of safflower varied among flowering dates.
Association Temperature in degree-days tended to be negatively correlated with oil content of the meats in safflower.
Association Number of degree-days was positively correlated with protein percentage of the meats in safflower.

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Late sowing reduced paddy-rice grain yield less than upland-rice yield at 20 cm spacing.

Taxon: paddy ricee0
Treatment: late sowinge0
Outcome: grain yielde0
Direction: decreasee0
Comparator: upland ricee0

Verbatim

e0
“In the case of 20 cm row spacing, the grain yield decrease of paddy rice caused by late sowing was less than that of upland rice.”
✓ located verbatim in the source · abstract, characters 1075–1204

Title

Paddy Rice Growing in Upland Field : The adaptability to row spacing and sowing date

Shinichi HASEGAWA; Giichi TAKEMURA; Kanenori NAKAYAMA Japanese Journal of Crop Science 1960. doi:10.1626/jcs.29.19

Other claims from this paper (14)

Intervention effect At early sowing, 20 cm spacing raised paddy-rice grain yield about 20 per cent versus 60 cm.
Intervention effect At early sowing, 20 cm spacing raised upland-rice yield by 0∼10 percent versus 60 cm.
Observation Under 20 cm spacing paddy-rice yields exceeded upland rice except Norin No. 1.
Intervention effect Closer spacing increased paddy-rice ears and straw weight per unit area.
Intervention effect Average weight per ear decreased less in paddy than upland rice with closer spacing.
Observation At late sowing, paddy-rice yield was much higher than upland-rice yield.
Intervention effect Late sowing reduced paddy-rice ear weight and grain-to-straw ratio less than upland rice.
Observation Upland rice had a higher leaf-blade-to-sheath ratio than paddy rice.
Observation At usual spacing, upland-rice leaf blades were larger than paddy-rice blades.
Intervention effect Close spacing reduced upland-rice blade size to about paddy-rice size.
Intervention effect Close spacing left upland-rice blade-to-sheath ratio high.
Intervention effect Late sowing raised the upland-rice blade-to-sheath ratio.
Intervention effect Late sowing and close spacing markedly reduced upland-rice leaf-sheath weight.
Mechanism The authors attribute lower late-sown upland-rice yield to low stored carbohydrates and low post-heading photosynthesis.

Associationobservedoriginal resultpositivemeasured

Claim · model-written summary

Successive defoliations brought progressively smaller top-yield declines.

Taxon: Italian ryegrassLolium multiflorume1
Treatment: repeating of defoliatione0
Outcome: decrease of top yieldse0
Direction: reducede0

Verbatim

e0
“with the progress of repeating of defoliation, the decrease of top yields and stubble·root dry weight following each defoliation were reduced.”
✓ located verbatim in the source · abstract, characters 445–587

e1
“the regrowth of shoot in Italian ryegrass”
✓ located verbatim in the source · abstract, characters 140–181

Title

Physiological and Ecological Studies on Clipping of Herbage Plants. : II. Influence of cutting frequency on the exhaustion of root·stubble reserves and the regrowth of shoot.

Satoshi MAEDA Japanese Journal of Crop Science 1961. doi:10.1626/jcs.30.31

Other claims from this paper (9)

Intervention effect More frequent leaf removal reduced total leaf production.
Intervention effect More frequent leaf removal reduced root-stubble dry weight.
Observation The first clipping caused the largest decline in shoot yield.
Observation The first clipping caused the largest decline in root-stubble dry weight.
Association Successive defoliations brought progressively smaller root-stubble dry-weight declines.
Association Available carbohydrate concentration in root-stubble declined as clipping frequency increased.
Intervention effect Root-stubble nitrogen concentration was higher with 50-day clipping than with no clipping.
Association Root-stubble nitrogen concentration declined as clipping frequency increased.
Association Increasing clipping frequency appeared to raise the root-stubble cell-wall to reserve-substance ratio.

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“yield decrease”

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