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“yield decrease”

119 matches

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plus 23 non-evaluative

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1950 ’60 ’70 ’80 ’90 2000 ’10 ’20

plus 31 earlier · 1910s–1940s

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Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

High chloride concentrations applied in row fertilization decreased corn growth, maturity and yield.

Taxon: cornZea mays subsp. mayse1
Treatment: High concentrations of chloride attained in row fertilizatione1
Outcome: growth, maturity, and yielde1
Direction: decreaseinferrede1

Not reportedComparator

Verbatim

e1
“High concentrations of chloride attained in row fertilization had adverse effects on corn growth, maturity, and yield”
✓ located verbatim in the source · abstract, characters 9–126

Title

Growth, Maturity, and Yield of Corn as Affected by Chloride in Potassium Fertilizer¹

S. E. Younts; R. B. Musgrave Agronomy Journal 1958. doi:10.2134/agronj1958.00021962005000080001x

Other claims from this paper (3)

Intervention effect Broadcasting or mixing chloride with soil tended to alleviate the adverse effects of high row-applied chloride on corn.
Intervention effect Low chloride applications were not detrimental to corn growth, maturity and yield.
Intervention effect Low chloride applications were generally beneficial to corn growth, maturity and yield.

Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

After transplantation, height growth gradually decreased in short-day-treated rice.

Taxon: rice plantOryza sativat0
Organ / stage: After transplantatione0
Treatment: short-day treatmente1
Outcome: height-growthe0
Direction: decreasee0

Verbatim

e0
“After transplantation a gradual decrease in height-growth and increase of number of tillers was observed.”
✓ located verbatim in the source · abstract, characters 764–869

e1
“The short-day treatment caused an increase in plant height”
✓ located verbatim in the source · abstract, characters 622–680

t0
“After-effect of photoperiodism in relation to development and yield of rice plant”
✓ located verbatim in the source · title, characters 0–81

Title

After-effect of photoperiodism in relation to development and yield of rice plant : (III) Effect of growth and time of heading of rice plant.

Ryohei TAGUCHI; Michisuke KAWAI; Setsuo IKEMOTO Japanese Journal of Crop Science 1953. doi:10.1626/jcs.21.215

Other claims from this paper (15)

Intervention effect Short-day treatment induced premature heading in rice.
Intervention effect Short-day treatment delayed later natural heading, especially when premature-heading inductivity was large.
Intervention effect Long-day treatment combined with short-day appeared to cancel the heading delay.
Intervention effect Long-day treatment alone did not always have a remarkable heading effect.
Intervention effect Short-day treatment increased rice height in the seed bed versus controls.
Intervention effect Short-day treatment decreased tiller number in the seed bed versus controls.
Observation After transplantation, tiller number gradually increased in short-day-treated rice.
Observation Growth became vigorous again after premature heading.
Intervention effect At the final stage, short-day-treated rice was slightly taller than controls.
Intervention effect At the final stage, short-day-treated rice had more tillers than controls.
Intervention effect Long-day treatment resulted in shorter rice plants in the seed bed.
Intervention effect Long-day treatment resulted in many rice tillers in the seed bed.
Observation After transplantation, plant height increased under long-day treatment.
Intervention effect After transplantation, long-day-treated and control plants did not differ in height.
Intervention effect After transplantation, long-day-treated rice had slightly fewer tillers than controls.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Short-day treatment decreased tiller number in the seed bed versus controls.

Taxon: rice plantOryza sativat0
Treatment: short-day treatmente0
Outcome: number of tillerse0
Direction: decreasee0
Comparator: control plantse0
Setting: seed-bede0

Verbatim

e0
“The short-day treatment caused an increase in plant height and a decrease in number of tillers, in seed-bed, as compared with control plants.”
✓ located verbatim in the source · abstract, characters 622–763

t0
“After-effect of photoperiodism in relation to development and yield of rice plant”
✓ located verbatim in the source · title, characters 0–81

Title

After-effect of photoperiodism in relation to development and yield of rice plant : (III) Effect of growth and time of heading of rice plant.

Ryohei TAGUCHI; Michisuke KAWAI; Setsuo IKEMOTO Japanese Journal of Crop Science 1953. doi:10.1626/jcs.21.215

Other claims from this paper (15)

Intervention effect Short-day treatment induced premature heading in rice.
Intervention effect Short-day treatment delayed later natural heading, especially when premature-heading inductivity was large.
Intervention effect Long-day treatment combined with short-day appeared to cancel the heading delay.
Intervention effect Long-day treatment alone did not always have a remarkable heading effect.
Intervention effect Short-day treatment increased rice height in the seed bed versus controls.
Observation After transplantation, height growth gradually decreased in short-day-treated rice.
Observation After transplantation, tiller number gradually increased in short-day-treated rice.
Observation Growth became vigorous again after premature heading.
Intervention effect At the final stage, short-day-treated rice was slightly taller than controls.
Intervention effect At the final stage, short-day-treated rice had more tillers than controls.
Intervention effect Long-day treatment resulted in shorter rice plants in the seed bed.
Intervention effect Long-day treatment resulted in many rice tillers in the seed bed.
Observation After transplantation, plant height increased under long-day treatment.
Intervention effect After transplantation, long-day-treated and control plants did not differ in height.
Intervention effect After transplantation, long-day-treated rice had slightly fewer tillers than controls.

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Sulphuric acid did not lower eyespot-positive straw below unsprayed plots.

Taxon: winter wheatTriticum aestivumt0
Treatment: Sulphuric acide1
Outcome: percentage of straws with eyespote0
Direction: did not decreasee0
Comparator: unsprayed plotse0

Verbatim

e0
“did not decrease the percentage of straws with eyespot below that in unsprayed plots”
✓ located verbatim in the source · abstract, characters 1685–1769

e1
“Sulphuric acid sprayed in 1953”
✓ located verbatim in the source · abstract, characters 1502–1532

t0
“winter wheat”
✓ located verbatim in the source · title, characters 115–127

Title

Effects of nitrogen applied at different dates, and of other cultural treatments on eyespot, take-all and yield of winter wheat (field experiment, 1953)

G. A. Salt The Journal of Agricultural Science 1957. doi:10.1017/s0021859600031695

Other claims from this paper (13)

Intervention effect Halving seed rate reduced severe wheat eyespot from 63% to 52%.
Intervention effect Halving seed rate reduced the wheat area stunted by take-all from 36% to 14%.
Intervention effect Halving seed rate increased wheat yield by 8·3 cwt. in nitrogen-deficient plots.
Intervention effect Halving seed rate increased wheat yield by 2·6 cwt./acre in well-fertilized plots.
Intervention effect Ammonium sulphate had little effect on Squareheads Master eyespot lesions.
Intervention effect Fertilizer increased lodging of Squareheads Master from 23% to 53% and 60% at two rates.
Intervention effect Fertilizer decreased take-all stunting of Squareheads Master from 47% to 19% and 10%.
Intervention effect Fertilizer increased Squareheads Master yield from 13 to 17 and 18 cwt./acre.
Observation Cappelle did not lodge in the trial.
Intervention effect Fertilizer decreased Cappelle take-all patches from 51% to 28% and 18%.
Intervention effect Fertilizer increased Cappelle grain yield from 15 to 20 and 21 cwt./acre.
Intervention effect Nitrogen application timing had no important effect on disease incidence or yield in either wheat variety.
Intervention effect Sulphuric acid reduced lodging and weed cover in wheat blocks.

Associationobservedoriginal resultmeasured

Claim · model-written summary

Dry matter yield fell with monthly precipitation.

Taxon: Pennisetum purpureum SchumCenchrus purpureust0
Outcome: drymatter yieldse0
Direction: decreaseinferrede0
Qualifier: degree of monthly precipitatione0
Comparator: green fodder yieldse0

Not reportedSetting

Verbatim

e0
“green fodder yields were directly, drymatter yields were inversely, related to the degree of monthly precipitation”
✓ located verbatim in the source · abstract, characters 2977–3091

t0
“Pennisetum purpureum Schum.”
✓ located verbatim in the source · title, characters 95–122

Title

Effect of frequency of cutting on the yield and composition of some fodder grasses in Nigeria (Pennisetum purpureum Schum.)

V. A. Oyenuga The Journal of Agricultural Science 1959. doi:10.1017/s0021859600030884

Other claims from this paper (18)

Intervention effect Twelve-week cutting yielded 52·9 tons of green fodder per acre over 11 months.
Intervention effect Twelve-week cutting produced 1·8 times as much green fodder as three-week cutting.
Intervention effect Twelve-week cutting produced 1-4 times as much fodder as six- and eight-week cutting.
Association Dry matter percentage rose with longer cutting intervals.
Observation Dry matter yield differences among intervals were more pronounced than green fodder yield differences.
Intervention effect Six- or eight-week cutting gave higher dry matter yield than three-week cutting.
Intervention effect Twelve-week cutting gave higher dry matter yield than other intervals.
Intervention effect Eight- versus six-week dry matter yield differences were not significant.
Association Green fodder and dry matter yields declined with successive cuttings, particularly with frequent cutting.
Observation Stems matured more rapidly than leaves after more than three weeks of growth.
Association Crude protein and silica-free ash percentages fell with longer cutting intervals.
Association Dry matter, crude fibre, and nitrogen-free extract percentages rose with longer cutting intervals.
Recommendation Three-week cutting is recommended for maximum protein and ash yield.
Recommendation Twelve-week cutting is recommended for maximum total nutrients and carbohydrates.
Recommendation Six- and eight-week cutting was judged unprofitable for either nutrient goal.
Association Green fodder yield rose with monthly precipitation.
Association Crude protein and silica-free ash percentages varied directly with rainfall.
Association Nitrogen-free extract and crude fibre percentages varied inversely with rainfall.

Intervention effectobservedoriginal resultmixedmeasured

Claim · model-written summary

Soil conditioners increased crop yields in most experiments but decreased yield in one.

Taxon: cropse0
Treatment: Soil conditionerse0 t0
Outcome: crop yieldse0
Direction: increasese0

Not reportedComparator

Verbatim

e0
“Secondary effects on crops included increases in crop yields (in one experiment a decrease)”
✓ located verbatim in the source · abstract, characters 358–449

t0
“The effect of soil conditioners on plant growth and soil structure”
✓ located verbatim in the source · title, characters 0–66

Title

The effect of soil conditioners on plant growth and soil structure

K. Simpson; S. F. Hayes Journal of the Science of Food and Agriculture 1958. doi:10.1002/jsfa.2740090308

Other claims from this paper (9)

Intervention effect Soil-conditioner treatments raised water-stable aggregates.
Intervention effect Soil conditioners delayed crop emergence.
Intervention effect Soil conditioners increased emergence percentage on clay soils.
Intervention effect Soil conditioners reduced damping-off at dressing rates up to 0.025%.
Intervention effect Soil conditioners postponed permanent wilting by up to 16 days on sandy soil.
Intervention effect Seaweed meal hastened germination.
Intervention effect Seaweed meal increased emergence percentage.
Intervention effect Seaweed meal had little effect on final crop yield.
Intervention effect Under humid conditions seaweed meal induced almost complete damping off of seedlings.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Densely sown rice yielded about half the usual culture yield.

Taxon: riceOryza sativat0
Treatment: denselye1
Outcome: yielde0
Direction: lowe0
Value: about halfe0
Comparator: usual cultmee0

Verbatim

e0
“showed low yield, about half of that in the usual cultme”
✓ located verbatim in the source · abstract, characters 665–721

t0
“Rice Plants”
✓ located verbatim in the source · title, characters 52–63

e1
“one sown densely (18 × 18cm)”
✓ located verbatim in the source · abstract, characters 280–308

Title

Analysis of Mechanisms of the Decrease of Yields of Rice Plants Cultured under Late-Transplanting Conditions : (I) On the Yielding Efficiency of Seedlings Sowed Sparsely and Densely to Seed-Bed

tetsuro KOMATSU; Tetsuya HIRANO; Kizo SUENAGA; et al. Japanese Journal of Crop Science 1952. doi:10.1626/jcs.21.187

Other claims from this paper (13)

Intervention effect Sparsely sown rice seedlings produced more than thirty tillers by transplanting.
Intervention effect Sparsely sown rice had high yield under late transplanting.
Intervention effect Densely sown rice had no tillers at transplanting.
Observation After transplanting, sparse plot rice continued some tillering.
Observation After transplanting, dense plot rice developed many new tillers at upper stem nodes.
Intervention effect Sparsely sown seedlings produced more tillers and ears.
Mechanism Early lower stem tillering led to earlier heading.
Mechanism Early heading resulted in heavier grain weight.
Recommendation The authors conclude sparse sowing can maintain higher yield even with late transplanting, subject to weather.
Mechanism Narrow seedbed spacing seriously inhibited tillering.
Intervention effect Dense sowing produced fewer tillers and stems than other plots.
Mechanism Delayed tillering delayed heading.
Mechanism Delayed heading resulted in light grains.

Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

At harvest, well-drained rice had greater culm length, panicle number and kernel yield.

Taxon: riceOryza sativat0
Outcome: culm length, number of panicles and kernel yielde0
Direction: greatere0
Comparator: ill-drainede0
Setting: well-drained paddy fieldse0

Verbatim

e0
“at the harvest time the culm length, number of panicles and kernel yield in well-drained paddy fields were greater than that in the ill-drained.”
✓ located verbatim in the source · abstract, characters 409–553

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

Title

On the Mechanism of decrease of rice yield in ill-drained paddy field

Mitsuo KIDO; Takeyasu MUSHA; Yoshio ICHIKAWA Japanese Journal of Crop Science 1954. doi:10.1626/jcs.22.3-4_51

Other claims from this paper (4)

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

More clover root borers were associated with lower red clover foliage weight after accounting for crown diameter.

Taxon: Red CloverTrifolium pratenset0
Interactor: Hylastinus obscurusHylastinus obscuruse1pest
Outcome: foliage weighte0
Direction: decreasee0
Qualifier: independent of crown diametere0

Verbatim

e0
“Regression of foliage weight on borers, independent of crown diameter, showed an increase in number of borers to result in a decrease in foliage weight.”
✓ located verbatim in the source · abstract, characters 422–574

e1
“clover root borer, Hylastinus obscurus (Marsham)”
✓ located verbatim in the source · abstract, characters 65–113

t0
“Red Clover”
✓ located verbatim in the source · title, characters 14–24

Title

Estimation of Red Clover Yield Losses Caused by the Clover Root Borer

K. P Pruess; C. R Weaver Journal of Economic Entomology 1958. doi:10.1093/jee/51.4.491

Other claims from this paper (3)

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Sparsely sown rice had high yield under late transplanting.

Taxon: riceOryza sativat0
Treatment: sparsely sown plote1
Outcome: yielde0
Direction: highe0
Comparator: other plote0

Verbatim

e0
“and howed high yield. But in the other plot the tillering is inhibited”
✓ located verbatim in the source · abstract, characters 545–615

t0
“Rice Plants”
✓ located verbatim in the source · title, characters 52–63

e1
“The seedlings in sparsely sown plot”
✓ located verbatim in the source · abstract, characters 402–437

Title

Analysis of Mechanisms of the Decrease of Yields of Rice Plants Cultured under Late-Transplanting Conditions : (I) On the Yielding Efficiency of Seedlings Sowed Sparsely and Densely to Seed-Bed

tetsuro KOMATSU; Tetsuya HIRANO; Kizo SUENAGA; et al. Japanese Journal of Crop Science 1952. doi:10.1626/jcs.21.187

Other claims from this paper (13)

Intervention effect Sparsely sown rice seedlings produced more than thirty tillers by transplanting.
Intervention effect Densely sown rice had no tillers at transplanting.
Intervention effect Densely sown rice yielded about half the usual culture yield.
Observation After transplanting, sparse plot rice continued some tillering.
Observation After transplanting, dense plot rice developed many new tillers at upper stem nodes.
Intervention effect Sparsely sown seedlings produced more tillers and ears.
Mechanism Early lower stem tillering led to earlier heading.
Mechanism Early heading resulted in heavier grain weight.
Recommendation The authors conclude sparse sowing can maintain higher yield even with late transplanting, subject to weather.
Mechanism Narrow seedbed spacing seriously inhibited tillering.
Intervention effect Dense sowing produced fewer tillers and stems than other plots.
Mechanism Delayed tillering delayed heading.
Mechanism Delayed heading resulted in light grains.

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“yield decrease”

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