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“yield decrease”

1,236 matches

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plus 252 non-evaluative

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plus 31 earlier · 1910s–1940s

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Mechanismauthor interpretationoriginal resultnegativemeasured

Claim · model-written summary

Yield reduction was mainly due to fewer grains per panicle.

Taxon: sorghumSorghumt0
Outcome: Yield reductione0
Qualifier: decrease in number of grains per paniclee0

Verbatim

e0
“Yield reduction was mainly due to a decrease in number of grains per panicle”
✓ located verbatim in the source · abstract, characters 1276–1352

t0
“sorghum”
✓ located verbatim in the source · title, characters 74–81

Title

Effects of competition with weeds on the growth, development and yield of sorghum

A. P. Everaarts The Journal of Agricultural Science 1993. doi:10.1017/s0021859600074220

Other claims from this paper (15)

Observation Weed growth was concentrated in rows.
Intervention effect Weed competition reduced sorghum ground cover and leaf area index from about 20–30 days after planting.
Intervention effect Weed competition reduced sorghum growth rates and yields.
Intervention effect Weed competition lowered sorghum yields.
Intervention effect Weed competition did not affect sorghum population density.
Intervention effect Weed competition reduced sorghum leaf number.
Intervention effect Weed competition initially increased stem length in one season.
Intervention effect Weed competition retarded stem length in another season.
Observation Nutrient competition was strong by 15 days after planting.
Observation Nitrogen was initially the most contested nutrient.
Observation Competition for water occurred.
Observation Competition for light seemed unlikely.
Recommendation About 20 weed-free days after planting were needed to avoid sorghum yield losses.
Recommendation Around 30 weed-free days were needed for negligible weed growth at harvest.
Recommendation Weed competition during floret establishment should be avoided.

Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Cotton yield decreased 40% in check west versus 1992.

Taxon: CottonGossypium hirsutumt0
Outcome: yielde1
Direction: decreasee0
Value: 40%e0
Comparator: 1992e2
Setting: check weste0

Verbatim

e0
“a 40% decrease in check west”
✓ located verbatim in the source · abstract, characters 1402–1430

e1
“increase in yield in the program area”
✓ located verbatim in the source · abstract, characters 1332–1369

e2
“as compared to 1992”
✓ located verbatim in the source · abstract, characters 1431–1450

t0
“Cotton”
✓ located verbatim in the source · title, characters 64–70

Title

Control of Sweepotato (Silverleaf) Whitefly, Bemisia Tabaci, on Cotton in Paloma, Arizona

Osama El‐Lissy; Larry Antilla; R. T. Staten; et al. UA Campus Repository (The University of Arizona) 1994

Other claims from this paper (9)

Intervention effect Adult whiteflies were significantly higher in check east than in the program area by twofold.
Intervention effect Adult whiteflies were significantly higher in check west than in the program area by sixfold.
Intervention effect Whitefly eggs were threefold higher in check east.
Intervention effect Whitefly eggs were 39-fold higher in check west.
Intervention effect Whitefly nymphs were significantly threefold higher in check east.
Intervention effect Whitefly nymphs were significantly 60-fold higher in check west.
Observation Cotton yield increased approximately 20% in the program area versus 1992.
Observation Cotton yield increased 5% in check east versus 1992.
Recommendation The authors recommend an area-wide strategy using edge treatment and field sampling for whitefly control.

Mechanismauthor interpretationoriginal resultsignificant (as stated)basis n/a

Claim · model-written summary

Lodging of intercropped soybean may be due to the significant decrease in stem NDF.

Taxon: soybeanGlycine maxe4
Outcome: lodgede4
Qualifier: significant decrease in stem NDFe4

Verbatim

e4
“Intercropped soybean was lodged both years more than monocrop soybean, which may have been due to the significant decrease in stem NDF”
✓ located verbatim in the source · abstract, characters 1316–1450

Title

Sorghum Intercropping Effects on Yield, Morphology, and Quality of Forage Soybean

Daren D. Redfearn; Dwayne R. Buxton; Tom E. Devine Crop Science 1999. doi:10.2135/cropsci1999.3951380x

Other claims from this paper (13)

Intervention effect Intercropped soybean had 6 more plants per m of row than monocrop soybean.
Intervention effect Intercropped soybean had less advanced morphological development than monocrop soybean.
Intervention effect Intercropped soybean had 2.3 Mg ha −1 less dry matter than monocrop soybean.
Intervention effect Leaf IVDMD, NDF and hemicellulose did not differ between intercropped and monocrop soybean.
Intervention effect Leaf cellulose did not differ between intercropped and monocrop soybean.
Intervention effect Stem IVDMD was 33 g kg −1 greater in intercropped than in monocrop soybean.
Intervention effect Stem NDF concentration decreased by 36 g kg −1 in intercropped soybean compared with monocrop soybean.
Intervention effect Intercropped soybean lodged more than monocrop soybean in both years.
Association Leaf CP concentration was 25 g kg −1 greater in monocrop soybean than in intercropped soybean.
Association Stems of intercropped soybean had 12 g kg −1 greater CP than monocrop soybean stems.
Observation Soybean showed a high degree of morphological plasticity.
Association Forage quality of intercropped soybean was greater than that of monocrop soybean.
Recommendation Intercropping forage-type soybean with another tall-growing forage does not appear practical because of lower dry matter accumulation.

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

The largest decrease in F2 was in single crosses, followed by three way cross, double cross and composite varieties.

Taxon: dent corne0
Material: single crossese1
Outcome: amount of decreasee1
Direction: higheste1
Qualifier: followed three way cross, double cross and composite varietiese1

Verbatim

e0
“dent corn”
✓ located verbatim in the source · abstract, characters 112–121

e1
“Generally the highest amount of decrease was found in the single crosses, followed three way cross, double cross and composite varieties”
✓ located verbatim in the source · abstract, characters 771–907

Title

Researches on Yield and Yield Components in the F1 and F2 Generations of Hybrid and Composite Dent Corn Varieties

Sabri GÖKMEN TURKISH JOURNAL OF AGRICULTURE AND FORESTRY 1997. doi:10.55730/1300-011x.2832

Other claims from this paper (5)

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

CPPU spraying decreased cumulative yield over two years.

Taxon: AVOCADOPersea americanat0
Material: HASSt0
Treatment: CPPUe0
Outcome: cumulative yielde0
Direction: decreasee0
Qualifier: Over the two-year periode0

Not reportedComparator

Verbatim

t0
“AVOCADO CV HASS”
✓ located verbatim in the source · title, characters 49–64

e0
“Over the two-year period, CPPU treated trees showed a decrease in cumulative yield”
✓ located verbatim in the source · abstract, characters 141–223

Title

EFFECT OF CPPU SPRAYS ON YIELD AND FRUIT SIZE IN AVOCADO CV HASS

S Kremer-Köhne 1993

Other claims from this paper (2)

Intervention effect CPPU spraying enhanced alternate bearing over two years.
Intervention effect An increase in Hass avocado fruit size could not be attributed to CPPU because yields differed substantially between treated and control trees.

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Grain yield decreased with increasing row width.

Taxon: SoybeanGlycine maxt0
Treatment: row widthe0
Outcome: grain yielde0
Direction: decreasee0
Value: 3497, 3250, 2920 kg/hae0

Verbatim

e0
“A linear decrease with increasing row width was observed for grain yield (3497, 3250, 2920 kg/ha)”
✓ located verbatim in the source · abstract, characters 849–946

t0
“Soybean”
✓ located verbatim in the source · title, characters 0–7

Title

Soybean Yield Response to Narrow Rows Is Largely due to Enhanced Early Growth

D. Bullock; S. Khan; A. Rayburn Crop Science 1998. doi:10.2135/cropsci1998.0011183x003800040021x

Other claims from this paper (7)

Association Pods per plant decreased with increasing row width.
Association Plant height decreased with increasing row width.
Association Branch number decreased with increasing row width.
Association Harvest index decreased with increasing row width.
Association Crop growth rate increased as rows narrowed until R5.
Observation After R5 row width had no significant effect on crop growth rate.
Mechanism Authors attribute narrow row yield advantage mainly to effects before grain fill.

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Direct-drilling through chopped straw did not decrease winter wheat yield on the clay soil.

Taxon: winter wheatTriticum aestivumt0
Treatment: Direct‐drilling through chopped strawe0
Outcome: yielde0
Direction: but not on the clay soile0
Setting: clay soile0

Not reportedComparator

Verbatim

e0
“Direct‐drilling through chopped straw decreased yield on the silt loam but not on the clay soil”
✓ located verbatim in the source · abstract, characters 676–771

t0
“winter wheat”
✓ located verbatim in the source · title, characters 99–111

Title

The effects of straw disposal and depth of cultivation on the growth, nutrient uptake and yield of winter wheat on a clay and a silt soil

D. G. Christian; E. T. G. Bacon Soil Use and Management 1991. doi:10.1111/j.1475-2743.1991.tb00877.x

Other claims from this paper (7)

Intervention effect Tine cultivation incorporated less straw than ploughing.
Intervention effect Tine cultivation decreased plant establishment and early growth of winter wheat compared with ploughing.
Intervention effect Tine cultivation did not decrease winter wheat yield.
Intervention effect Direct-drilling through chopped straw decreased winter wheat yield on the silt loam.
Intervention effect Short straw (< 5 cm) was easier to incorporate than longer straw.
Intervention effect Ploughing was the most efficient method of straw incorporation because it inverts soil.
Association Early effects on crop growth and nutrient uptake following straw incorporation were transient and associated with large amounts of straw in the seeded layer of soil.

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Increasing preemergence fluometuron from banded to broadcast coverage produced a further decrease in weed biomass.

Taxon: Gossypium hirsutumGossypium hirsutumt0
Treatment: preemergence fluometuron was increased from banded to broadcast coveragee1
Outcome: A further decreasee1
Direction: decreasee1
Comparator: bandede1

Verbatim

t0
“Cotton (Gossypium hirsutum)”
✓ located verbatim in the source · title, characters 0–27

e1
“A further decrease was observed when preemergence fluometuron was increased from banded to broadcast coverage”
✓ located verbatim in the source · abstract, characters 577–686

Title

Cotton (Gossypium hirsutum) Yield Response to Mechanical and Chemical Weed Control Systems

Charles E. Snipes; Thomas C. Mueller Weed Science 1992. doi:10.1017/s0043174500057301

Other claims from this paper (7)

Intervention effect A banded preemergence fluometuron application reduced weed biomass by 28 to 47%.
Intervention effect Postdirected herbicide application or cultivation had little effect on weed density.
Intervention effect Seed cotton yields were low with no preemergence fluometuron.
Intervention effect Banded fluometuron with at least one cultivation gave yields similar to broadcast fluometuron alone.
Association Cotton yields were related to weed density and weed biomass in a hyperbolic relationship.
Association Low weed densities caused more yield loss per unit weed density than higher densities.
Association Weed densities, primarily prickly sida, morningglories and hemp sesbania, varied widely among years and were directly related to early season rainfall.

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Weed interference decreased seeds and grain yield per plant.

Taxon: SoybeanGlycine maxt0
Interactor: Weedt0weed
Outcome: seeds/plant, grain yield/plante0
Direction: decreasee0

Verbatim

e0
“decrease idry mauer/plant, branches/plant, pods/plants, seeds/plant, grain yield/plant”
✓ located verbatim in the source · abstract, characters 476–562

t0
“Weed Competition in Soybean”
✓ located verbatim in the source · title, characters 23–50

Title

The Critical Period of Weed Competition in Soybean [Glycine max (L.) Merrill]

R.S. Chhokar; R. S. Balyan; S. S. Pahuja Indian Journal of Weed Science 1995

Other claims from this paper (6)

Observation The critical weed control period for soybean was 27 to 40 days after sowing.
Intervention effect Maintaining weed-free soybean to 45 DAS increased grain yield 95.7% over the weedy check.
Association Weed interference increased soybean plant height.
Association Weed interference decreased soybean dry matter, branches and pods per plant.
Association Weed interference decreased soybean oil content and oil yield.
Association Weed interference decreased grain and straw yield.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

GA3 decreased hybrid rice grain yield.

Taxon: riceOryza sativae0
Material: hybrid ricee0
Treatment: GA3 treatmente0
Outcome: grain yielde0
Direction: decreasee0

Not reportedComparator

Verbatim

e0
“GA3 treatment could increase 1000-grain weight with low seed-setting rate, eventually decrease the grain yield of hybrid rice.”
✓ located verbatim in the source · abstract, characters 299–425

Title

Regulating the inter-grain apical dominance of rice by GA_(3) and PP333

Xi Wang; Longxing Tao; Xiaolin Huang; et al. Zhongguo shuidao kexue 1999

Other claims from this paper (6)

Intervention effect GA3 enhanced rice panicle apical dominance.
Intervention effect PP333 inhibited rice panicle apical dominance.
Intervention effect GA3 increased rice 1000-grain weight with low seed-setting rate.
Intervention effect PP333 at initial heading increased grain yield in hybrid and conventional rice.
Intervention effect High-concentration GA3 negatively affected rice grain yield.
Intervention effect High-concentration PP333 negatively affected rice grain yield.

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“yield decrease”

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