Search claims · PlantClaims

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Grass yields were depressed when companion crop yields were high.

Taxon: Grasse0
Outcome: Grass yieldse0
Direction: depressede0
Qualifier: companion crop yields were highe0
Setting: companion crope0

Verbatim

e0
“Grass yields were depressed when companion crop yields were high”
✓ located verbatim in the source · abstract, characters 356–420

Title

No-till Forage Establishment in Alaska

S. Sparrow; M. T. Panciera; Darleen T. Masiak; et al. ScholarWorks - UA (University of Alaska System) 2003

Other claims from this paper (6)

Intervention effect Direct grass seeding into established grass stands generally did not improve yield or quality.
Intervention effect Seeding rate had little effect on no-till forage establishment.
Observation Grass yields typically did not recover in subsequent years.
Observation Red clover established well and produced high yields of good quality under no-till at Point MacKenzie.
Observation Red clover established poorly at Anchor Point and Delta Junction.
Recommendation Authors judge no-till seeding of most forage crops into declining grass stands unlikely to succeed in Alaska with current technology.

Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

At disadvantaged sites, grass yields were more severely depressed than Siratro yields.

Taxon: grasse0
Outcome: grass yieldse0
Direction: depressede0
Value: 28%e0
Comparator: Siratro yieldse0

Verbatim

e0
“at disadvantaged sites (28% of total), grass yields were more severely depressed than Siratro yields”
✓ located verbatim in the source · abstract, characters 599–699

t0
“Siratro/grass pastures”
✓ located verbatim in the source · title, characters 48–70

Title

Prediction of response to sulfur by established Siratro/grass pastures in south-eastern Queensland

GE Rayment Australian Journal of Experimental Agriculture 1983. doi:10.1071/ea9830280

Other claims from this paper (10)

Intervention effect Gypsum benefits reached a maximum 32% in Siratro at fewer than 25% of sites.
Method / resource Past sulfur history, Siratro proportion and pasture age did not predict yield effects.
Association Siratro relative yield correlated significantly with soil sulfate and plant sulfur concentrations.
Method / resource Sulfur in whole Siratro tops predicted responsiveness with R2 = 0.65.
Method / resource Sulfur in diagnostic runner samples predicted Siratro responsiveness with R2 = 0.65.
Method / resource The critical sulfur concentration for diagnostic samples was 0. 16% S.
Method / resource The critical sulfur concentration for whole Siratro tops varied from 0.13 to 0. 15% S across models.
Method / resource Phosphate-extractable sulfate was the most effective soil test but explained less than 50% of Siratro relative-yield variation.
Method / resource A critical soil phosphate-extractable sulfate range of 3-5 ppm was indicated for Siratro.
Association Grass and total pasture relative yields did not correlate with the chemical tests.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Grazing reduced grass seed yields.

Taxon: grass-seed cropse0
Treatment: Grazinge0
Outcome: seed yieldse0
Direction: reducede0

Not reportedComparator

Verbatim

e0
“Grazing grass-seed crops reduced seed yields”
✓ located verbatim in the source · abstract, characters 1115–1159

Title

Recent grass seed production studies in Canterbury

K.R. Brown NZGA Research and Practice Series 1980. doi:10.33584/rps.1.1979.3295

Other claims from this paper (8)

Association Plant density was negatively related to seed yield per plant.
Association Seed yield per area plateaued across the density range.
Observation The optimum density for Grasslands Tama was 300 to 400 plants/m.
Observation The optimum density for Grasslands Nui was 300 to 400 plants/m.
Observation The optimum density for Grasslands Matua was 100 to I30 plants/m.
Intervention effect Nitrogen increased seed yields regardless of application time.
Observation Nitrogen was most efficient just after stem elongation commenced.
Intervention effect Grazing negatively affected seedhead size and individual seed weights.

Associationobservedoriginal resultmeasured

Claim · model-written summary

Grass yields were relatively insensitive to climate variation.

Taxon: Grasse0
Outcome: Grass yieldse0
Direction: relatively insensitivee0
Setting: climatic variatione0

Verbatim

e0
“Grass yields were relatively insensitive to climatic variation”
✓ located verbatim in the source · abstract, characters 803–865

Title

XII. General discussion

J. H. Hoglund; J. R. Crush; J. L. Brock; et al. New Zealand Journal of Crop and Horticultural Science 1979. doi:10.1080/03015521.1979.10426162

Other claims from this paper (5)

Observationobservedoriginal resultmeasured

Claim · model-written summary

Average prairie grass seed yields were 680 kg ha-'.

Taxon: PRAIRIE GRASSt0
Outcome: Average yieldse0
Value: 680 kg ha-'e0

Verbatim

e0
“Average yields are 680 kg ha-'”
✓ located verbatim in the source · abstract, characters 170–200

t0
“PRAIRIE GRASS”
✓ located verbatim in the source · title, characters 0–13

Title

PRAIRIE GRASS

I.R. Brown; J.G. Hampton; C. Lill NZGA Research and Practice Series 1990. doi:10.33584/rps.5.1998.3331

Other claims from this paper (2)

Observation In 1987/88, 459 hectares of prairie grass were grown for seed.
Observation Specialist growers can achieve prairie grass seed yields of 1400 kg ha-'.

Observationobservedoriginal resultno effectmeasured

Claim · model-written summary

Organic clover-grass ley yields were similar to conventional grass ley yields.

Taxon: clover-grass leyse0
Treatment: organic farminge0
Outcome: yieldse0
Direction: similare0
Comparator: grass-leys in the conventional systeme0

Verbatim

e0
“The yields of clover-grass leys in organic farming were similar to those of grass-leys in the conventional system.”
✓ located verbatim in the source · abstract, characters 820–934

Title

Conventional and organic cropping systems at Suitia I: Experimental design and summaries

Asko O. Hannukkala; Jukka Korva; Eeva Tapio Agricultural and Food Science 1990. doi:10.23986/afsci.72936

Other claims from this paper (7)

Observation Organic barley yield was one quarter to half that of conventional barley.
Observation Organic winter wheat yield was about 40% of conventional yield.
Observation Organic oat yield was about 40% of conventional yield.
Observation Organic potato yield was about 40% of conventional yield.
Observation Clover-grass leys outwintered after the first year.
Mechanism Acute nitrogen deficiency apparently explained poor organic crop growth.
Observation Weeds, plant diseases and insects were not remarkable problems in either cropping system.

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Average clover/grass yields were consistently higher over the 4 years than grass/N yields.

Taxon: perennial grasse0
Treatment: clover/grasse6
Outcome: yieldse6
Direction: highere6
Qualifier: over the 4 yearse6
Comparator: grass/Ne6

Verbatim

e0
“An investigation measured the influence of white clover on grass forage yields where perennial grass species were grown at four N rates with and without white clover”
✓ located verbatim in the source · abstract, characters 253–418

e6
“Average clover/grass yields were consistently higher over the 4 years than were grass/N yields”
✓ located verbatim in the source · abstract, characters 979–1073

Title

Forage Yields of Five Perennial Grasses with and without White Clover at Four Nitrogen Rates

James W. Dobson; E. R. Beaty Journal of Range Management 1977. doi:10.2307/3897813

Other claims from this paper (9)

Intervention effect White clover and perennial grass mixtures yielded more forage than grass fertilized with N.
Intervention effect Adding white clover significantly increased forage yields of perennial grasses at N rates up to 112 kg/ha.
Intervention effect Only at 336 kg N/ha were average yields of clover/grass and grass/N comparable.
Intervention effect Adding clover increased forage yield by 218.9% at the 0 kg/ha N rate.
Intervention effect Adding clover increased forage yield by 93.0% at the 37 kg/ha N rate.
Intervention effect Adding clover increased forage yield by 34.1% at the 112 kg/ha N rate.
Intervention effect Adding clover changed forage yield by 0.2% at the 336 kg/ha N rate.
Observation Clover production was concentrated in the first 7 months of the season and dropped sharply in August and September.
Recommendation White clover should be included in grass mixtures in Southern pastures to reduce the need for N fertilization.

Associationobservedoriginal resultmeasured

Claim · model-written summary

Grass yields were not simply related to clover yields or nitrogen fixation.

Taxon: Grasse0
Outcome: Grass yieldse0
Direction: not simply relatede0
Comparator: clover yields or N fixatione0

Verbatim

e0
“Grass yields were relatively insensitive to climatic variation and not simply related to either clover yields or N fixation”
✓ located verbatim in the source · abstract, characters 803–926

Title

XII. General discussion

J. H. Hoglund; J. R. Crush; J. L. Brock; et al. New Zealand Journal of Crop and Horticultural Science 1979. doi:10.1080/03015521.1979.10426162

Other claims from this paper (5)

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Spring nitrogen significantly increased early spring grass yields.

Taxon: grasse0
Treatment: Spring nitrogene0
Outcome: yields of early spring grasse0
Direction: increasede0

Not reportedComparator

Verbatim

e0
“Spring nitrogen significantly increased the yields of early spring grass”
✓ located verbatim in the source · abstract, characters 0–72

Title

THE PRODUCTION OF EARLY SPRING GRASS

H. K. Baker Grass and Forage Science 1960. doi:10.1111/j.1365-2494.1960.tb00194.x

Other claims from this paper (7)

Observation The spring yield response ranged from 9 to 28 lb dry matter per lb nitrogen.
Intervention effect Autumn nitrogen significantly increased autumn herbage yield.
Observation Autumn nitrogen increased herbage by 12 to 22 lb dry matter per lb nitrogen.
Intervention effect Autumn nitrogen significantly increased early spring grass yield in 1956, but only slightly.
Intervention effect Autumn grazing effects on spring yields were inconsistent and small relative to spring nitrogen.
Intervention effect Autumn grazing tended to reduce soluble carbohydrates in grass stubble and roots in November.
Intervention effect Autumn nitrogen tended to reduce soluble carbohydrates in grass stubble and roots in November.

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Napier stunt disease reduced Napier grass yields.

Taxon: Napier grassCenchrus purpureuse0
Treatment: The diseasee0
Outcome: Napier grass yieldse0

Not reportedDirection

Verbatim

e0
“The disease had affected Napier grass yields”
✓ located verbatim in the source · abstract, characters 1074–1118

Title

Farmers' knowledge and perceptions of the stunting disease of Napier grass in Western Kenya

Z. R. Khan; C. A. O. Midega; I. M. Nyang'au; et al. Plant Pathology 2014. doi:10.1111/ppa.12215

Other claims from this paper (8)

Observation Most surveyed farmers were aware of Napier stunt disease.
Observation Farmers reported rapid regional spread of Napier stunt disease.
Association Access to agricultural information predicted awareness of disease spread.
Observation Most farmers could not feed livestock from their own Napier grass production and bought additional grass.
Observation Sellers received less income after productivity loss.
Observation Milk production fell by over 35%.
Observation Farmers did not know the disease cause and had no effective management strategy.
Recommendation The authors recommend an integrated disease management approach suited to mixed farming with simple decision aids.

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