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“yield decrease”

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Recommendationauthor interpretationoriginal resultnegativebasis n/a

Claim · model-written summary

Selection for yield could decrease meat and oil content.

Taxon: peanutArachis hypogaeat0
Outcome: meat and oil contente0
Direction: decreasee0

Verbatim

e0
“but would decrease meat and oil content”
✓ located verbatim in the source · abstract, characters 1887–1926

t0
“Peanut”
✓ located verbatim in the source · title, characters 107–113

Title

Heritabilities and Genetic Correlations for Yield and Quality Traits of Advanced Generations in a Cross of Peanut1

Hee Yang Chiow; J. C. Wynne Peanut Science 1983. doi:10.3146/i0095-3679-10-1-5

Other claims from this paper (16)

Observation Progenies varied substantially for yield, seed weight, meat and protein content.
Observation Progenies varied less for fruit length, fruit weight, oil content and maturity index.
Observation Heritability was highest for yield, meat and protein content.
Observation Heritability was intermediate for fruit length, fruit weight and seed weight.
Observation Heritability was lowest for oil content and maturity index.
Observation Genotypic correlations were generally higher than phenotypic correlations.
Association Maturity index showed low phenotypic correlations with yield and yield components.
Association Fruit size was highly correlated with seed weight.
Association Fruit size and seed weight were significantly correlated with yield.
Association Protein content and yield correlations were low.
Association Oil content was negatively correlated with yield.
Recommendation Selecting yield components was less effective than selecting yield directly.
Recommendation Selection for yield could increase protein content and fruit and seed traits.
Observation Transgressive segregation occurred across all studied traits.
Observation Progeny trait means were closer to the Spanish than the Virginia parent.
Observation Some progeny combined early maturity, high yield and large fruit.

Recommendationauthor interpretationoriginal resultnegativebasis n/a

Claim · model-written summary

The authors suggest ethephon may decrease grain yield without lodging.

Taxon: maizeZea mayst0
Outcome: decrease grain yielde0
Qualifier: in the absence of lodginge0

Verbatim

e0
“may decrease grain yield in the absence of lodging because of its potential deleterious effect on kernel number and growth”
✓ located verbatim in the source · abstract, characters 1708–1830

t0
“Maize”
✓ located verbatim in the source · title, characters 39–44

Title

Growth, Yield, and Yield Components of Maize as Influenced by Ethephon

W. J. Cox; H. F. Andrade Crop Science 1988. doi:10.2135/cropsci1988.0011183x002800030023x

Other claims from this paper (11)

Intervention effect Ethephon did not affect phytomass, NAR, or CGR in the dry 1985 season.
Intervention effect Ethephon reduced phytomass, NAR, and CGR in the wet 1986 season.
Association Plant density and hybrid did not influence growth response to ethephon.
Intervention effect Ethephon reduced lodging by 64%.
Intervention effect Ethephon had no overall effect on grain yield.
Intervention effect Ethephon increased Cornell 281 grain yield from 7.78 to 8.24 Mg ha −1.
Intervention effect Ethephon decreased Pioneer 3901 grain yield from 9.63 to 8.56 Mg ha −1.
Intervention effect Ethephon increased Cornell 281 kernel weight from 263 to 266 mg.
Intervention effect Ethephon decreased Pioneer 3901 kernel weight from 282 to 264 mg.
Intervention effect Ethephon significantly decreased kernels per ear in both hybrids from 494 to 474.
Recommendation The authors suggest ethephon may enhance maize yield where lodging is a problem.

Recommendationauthor interpretationoriginal resultbasis n/a

Claim · model-written summary

Hand weeding within 30 days after planting should be practiced to minimize yield decrease in sesame.

Taxon: sesameSesamum indicume0
Treatment: hand weedinge1
Outcome: yield decreasee1
Qualifier: within 30 days after plantinge1

Verbatim

e0
“weed competition in sesame”
✓ located verbatim in the source · abstract, characters 60–86

e1
“once more hand weeding should be practiced within 30 days after planting to minimize yield decrease”
✓ located verbatim in the source · abstract, characters 1324–1423

Title

Effect of Different PE Mulching Duration on the Competition Ability of Sesame Growing in Association with Various Weed Communities

J.I. Lee; Chung-Kil Kang; Y.W. Kwon Korean Journal of Weed Science 1986

Other claims from this paper (15)

Observation The number of weeds in sesame was maximum at 30 days after planting.
Observation Broad leaf weeds were more dominant than grass weeds in sesame.
Observation The weight of weeds increased continuously over the season.
Observation No weeds appeared in sesame until 15 days after planting.
Observation The weight of broad leaf weeds was heavier than that of grass weeds until 45 days after planting.
Observation Grass weeds were heavier than broad leaf weeds after 60 days after planting.
Observation Weed hazards to sesame growth and development appeared seriously from 60 to 75 days after planting.
Observation Main yield reduction of sesame appeared from 30 days after planting.
Observation Removing black PE film after 15 to 30 days after planting caused serious weed hazards to sesame growth characteristics.
Observation Removing black PE film caused serious weed hazards to sesame grain yield 30 days later.
Observation Leaf growth of sesame was maximum from 45 to 60 days after planting.
Observation Stem and root of sesame showed continuous increase in optimum planting.
Intervention effect Sesame growth decreased under the weedy check compared with PE film mulch and hand weeding.
Intervention effect Black PE film mulch lowered sesame growth compared with optimum planting and transparent PE film mulch.
Association Sesame yield decreased as weed weight increased.

Recommendationauthor interpretationoriginal resultbasis n/a

Claim · model-written summary

Returns from post-silking caterpillar control insecticide applications are expected to decrease as the crop matures.

Taxon: maizeZea mayst0
Outcome: returns from insecticide applications to control caterpillarse0
Direction: decreasee0

Verbatim

e0
“returns from insecticide applications to control caterpillars after silking will decrease with crop maturity”
✓ located verbatim in the source · abstract, characters 818–926

t0
“maize”
✓ located verbatim in the source · title, characters 59–64

Title

Effect of time and extent of defoliation on grain yield of maize in relation to Cosmopolitan Armyworm( Mythimna separata (Walker)) damage

J.A. Douglas; W.M. Kain; C.B. Dyson New Zealand Journal of Agricultural Research 1981. doi:10.1080/00288233.1981.10420898

Other claims from this paper (6)

Intervention effect Complete defoliation at silking cut grain yield by 77%.
Intervention effect Delaying defoliation toward maturity lessened grain yield reduction.
Intervention effect Less severe defoliation caused smaller reductions in grain yield.
Observation Middle and upper leaves contributed more to grain production than lower leaves.
Observation Yield losses above 20% occurred only when two-thirds of leaves were removed including the middle third.
Recommendation Caterpillar control is considered unnecessary after silking unless substantial defoliation is likely.

Recommendationauthor interpretationoriginal resultbasis n/a

Claim · model-written summary

Selecting any of four minerals at high concentration would increase the others and decrease sodium.

Taxon: Setaria sphacelataSetaria sphacelatat0
Outcome: selection for high concentration of any of these elementse0

Verbatim

e0
“selection for high concentration of any of these elements would result in an increase in the others, but a decrease in sodium”
✓ located verbatim in the source · abstract, characters 2015–2140

t0
“Setaria sphacelata”
✓ located verbatim in the source · title, characters 38–56

Title

Genetic analysis in the pasture grass Setaria sphacelata . II. Chemical composition, digestibility and correlations with yield

RA Bray; JB Hacker Australian Journal of Agricultural Research 1981. doi:10.1071/ar9810311

Other claims from this paper (15)

Observation Nitrogen, phosphorus, magnesium and calcium concentrations tended to be low in summer.
Observation Potassium concentration fell over the two years.
Observation Magnesium, calcium and sodium increased.
Observation Genetic variance for digestibility occurred at only two of 14 harvests.
Observation Additive genetic variance was significant and generally consistent for five elements.
Observation Family interactions with season and year were small.
Observation Additive variance effects for nine elements were erratic.
Recommendation Higher or lower concentrations of those elements were unlikely to be selected successfully.
Association Nitrogen, potassium, calcium, magnesium and sodium each correlated negatively with dry matter yield.
Recommendation Selecting higher mineral concentrations was predicted to reduce yield, possibly except potassium.
Association Sodium was genetically negatively correlated with nitrogen, potassium, calcium and magnesium.
Association Nitrogen, potassium, calcium and magnesium were mutually positively correlated.
Observation Genetic variation was detected in two mineral ratios.
Recommendation Breeding manipulation of the ratios was not warranted.
Recommendation The examples indicated potential to breed tropical forages for mineral ratios.

Recommendationauthor interpretationoriginal resultbasis n/a

Claim · model-written summary

N source selection should account for residue, with less yield decrease potential for urea-based materials in soybean residue.

Taxon: cornZea mays subsp. mayse0
Outcome: N source selection for no‐tillage corn can be affected by residue conditionse0
Qualifier: less potential for decreased yields when urea‐based N materials are used in soybean residue conditionse0

Verbatim

e0
“N source selection for no‐tillage corn can be affected by residue conditions, with less potential for decreased yields when urea‐based N materials are used in soybean residue conditions.”
✓ located verbatim in the source · abstract, characters 977–1163

Title

Response of No‐Tillage Corn Grown in Corn and Soybean Residues to Several Nitrogen Fertilizer Sources¹

D. J. Eckert; W. A. Dick; J. W. Johnson Agronomy Journal 1986. doi:10.2134/agronj1986.00021962007800020003x

Other claims from this paper (5)

Intervention effect urea produced lower corn yields than ammonia in corn residue during both years.
Intervention effect urea produced equivalent corn yields than ammonia in soybean residue during both years.
Intervention effect Urea‐ammonium nitrate solution produced lower corn yields than ammonia in corn residue during both years.
Intervention effect Urea‐ammonium nitrate solution produced equal corn yields than ammonia in soybean residue during 1982.
Intervention effect Urea‐ammonium nitrate solution produced lower corn yields than ammonia in soybean residue during 1983.

Recommendationauthor interpretationoriginal resultbasis n/a

Claim · model-written summary

Selecting higher mineral concentrations was predicted to reduce yield, possibly except potassium.

Taxon: Setaria sphacelataSetaria sphacelatat0
Outcome: selection for higher concentrations of any of these mineralse0
Qualifier: With the possible exception of potassiume0

Verbatim

e0
“With the possible exception of potassium, selection for higher concentrations of any of these minerals would result in a decrease in yield”
✓ located verbatim in the source · abstract, characters 1504–1642

t0
“Setaria sphacelata”
✓ located verbatim in the source · title, characters 38–56

Title

Genetic analysis in the pasture grass Setaria sphacelata . II. Chemical composition, digestibility and correlations with yield

RA Bray; JB Hacker Australian Journal of Agricultural Research 1981. doi:10.1071/ar9810311

Other claims from this paper (15)

Observation Nitrogen, phosphorus, magnesium and calcium concentrations tended to be low in summer.
Observation Potassium concentration fell over the two years.
Observation Magnesium, calcium and sodium increased.
Observation Genetic variance for digestibility occurred at only two of 14 harvests.
Observation Additive genetic variance was significant and generally consistent for five elements.
Observation Family interactions with season and year were small.
Observation Additive variance effects for nine elements were erratic.
Recommendation Higher or lower concentrations of those elements were unlikely to be selected successfully.
Association Nitrogen, potassium, calcium, magnesium and sodium each correlated negatively with dry matter yield.
Association Sodium was genetically negatively correlated with nitrogen, potassium, calcium and magnesium.
Association Nitrogen, potassium, calcium and magnesium were mutually positively correlated.
Recommendation Selecting any of four minerals at high concentration would increase the others and decrease sodium.
Observation Genetic variation was detected in two mineral ratios.
Recommendation Breeding manipulation of the ratios was not warranted.
Recommendation The examples indicated potential to breed tropical forages for mineral ratios.

Recommendationauthor interpretationoriginal resultbasis n/a

Claim · model-written summary

Selection for cutting tolerance seems more suitable for improving persistence than overcoming yield losses at higher harvest frequency.

Taxon: alfalfaMedicago sativae0
Outcome: improving the average persistence of alfalfae0
Qualifier: decrease in yield potentialities connected to the increase of harvest frequencye0

Verbatim

e0
“the selection for tolerance to frequent cutting regimes seems more suitable for improving the average persistence of alfalfa than in synthetizing new cultivars able to overcome the decrease in yield potentialities connected to the increase of harvest frequency”
✓ located verbatim in the source · abstract, characters 1088–1348

t0
“Selection for Tolerance to Frequent Cutting Regimes in Alfalfa1”
✓ located verbatim in the source · title, characters 0–63

t1
“A study was conducted on alfalfa ( Medicago sativa L.) to evaluate the effects of two cycles of phenotypic recurrent selection for tolerance to frequent harvest on persistence, dry matter, and crude protein yield.”
✓ located verbatim in the source · abstract, characters 0–213

e1
“One hundred and eight clones (72 from selected and 36 from control materials) were established in plant nursery in April 1982.”
✓ located verbatim in the source · abstract, characters 214–340

Title

Selection for Tolerance to Frequent Cutting Regimes in Alfalfa¹

F. Veronesi; A. Mariani; M. Falcinelli; et al. Crop Science 1986. doi:10.2135/cropsci1986.0011183x002600010013x

Other claims from this paper (5)

Intervention effect Selection increased persistence within each harvest treatment.
Intervention effect Selection increased dry-matter yield within each harvest treatment.
Intervention effect Selection increased crude-protein yield within each harvest treatment.
Intervention effect Frequent and very frequent harvest lowered dry-matter yield of selected material relative to infrequent harvest.
Intervention effect Frequent and very frequent harvest lowered crude-protein yield of selected material relative to infrequent harvest.

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“yield decrease”

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