Abstract
Red clover and alfalfa were inoculated with Pratylenchus penetrans and grown in an Alberry sandy loam soil to which potassium (K) was added at seeding at 0, 41.5, 83, and 166 microg/g. In one experiment with alfalfa, additional K was added after each forage cut to replace that which was removed. Nematode populations were not consistently affected by K fertilization. Nematode infection stunted red clover and alfalfa and resulted in lower yields at all K levels, except for alfalfa at the lowest K level. Nematode infection had no effect on taproot yields. However, it resulted in lower rootlet yields from red clover at all K levels, lower rootlet yields from alfalfa only at the highest K level in one experiment, and lower rootlet yields at all but the lowest K level in a second experiment, potassium fertilization enhanced yield of red clover and alfalfa. Yield increases were smaller from increased K fertilization in nematode-infested soil than in noninfested soil. Pralylenchus penetrans had little effect on the K content of red clover or alfalfa. The stunting of plants from nematode infection resulted in less K being removed from the soil.
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Claims 12
Claim · model-written summary
Nematode populations were not consistently affected by potassium fertilization.
- Taxon
- red clover and alfalfa
Medicago sativa
Trifolium pratenset0 - Treatment
- K fertilizatione1
- Interactor
- Pratylenchus penetrans
Pratylenchus penetranse0pathogen - Outcome
- Nematode populationse1
- Direction
- not consistently affectede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“red clover and alfalfa”
e1“Nematode populations were not consistently affected by K fertilization”
e0“Red clover and alfalfa were inoculated with Pratylenchus penetrans”
Claim · model-written summary
Nematode infection stunted red clover and alfalfa.
- Taxon
- red clover and alfalfaMedicago sativaTrifolium pratensee2
- Treatment
- Nematode infectione2
- Interactor
- Pratylenchus penetransPratylenchus penetranse0pathogen
- Outcome
- stuntinge1
- Direction
- stuntede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Nematode infection stunted red clover and alfalfa and resulted in lower yields at all K levels, except for alfalfa at the lowest K level”
e1“The stunting of plants from nematode infection resulted in less K being removed from the soil”
e0“Red clover and alfalfa were inoculated with Pratylenchus penetrans”
Claim · model-written summary
Nematode infection lowered red clover yields at all K levels.
- Taxon
- red cloverTrifolium pratensee2
- Treatment
- Nematode infectione2
- Interactor
- Pratylenchus penetransPratylenchus penetranse0pathogen
- Outcome
- yieldse2
- Direction
- lowere2
- Qualifier
- at all K levelse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Nematode infection stunted red clover and alfalfa and resulted in lower yields at all K levels, except for alfalfa at the lowest K level”
e0“Red clover and alfalfa were inoculated with Pratylenchus penetrans”
Claim · model-written summary
Nematode infection lowered alfalfa yields at all K levels except the lowest K level.
- Taxon
- alfalfaMedicago sativae2
- Treatment
- Nematode infectione2
- Interactor
- Pratylenchus penetransPratylenchus penetranse0pathogen
- Outcome
- yieldse2
- Direction
- lowere2
- Qualifier
- at all K levels, except for alfalfa at the lowest K levele2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Nematode infection stunted red clover and alfalfa and resulted in lower yields at all K levels, except for alfalfa at the lowest K level”
e0“Red clover and alfalfa were inoculated with Pratylenchus penetrans”
Claim · model-written summary
Nematode infection had no effect on taproot yields of red clover and alfalfa.
- Taxon
- red clover and alfalfaMedicago sativaTrifolium pratenset0
- Organ / stage
- taproote3
- Treatment
- Nematode infectione3
- Interactor
- Pratylenchus penetransPratylenchus penetranse0pathogen
- Outcome
- taproot yieldse3
- Direction
- no effecte3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“red clover and alfalfa”
e3“Nematode infection had no effect on taproot yields”
e0“Red clover and alfalfa were inoculated with Pratylenchus penetrans”
Claim · model-written summary
Nematode infection lowered rootlet yields of red clover at all K levels.
- Taxon
- red cloverTrifolium pratensee4
- Organ / stage
- rootlete4
- Treatment
- Nematode infectione3
- Interactor
- Pratylenchus penetransPratylenchus penetranse0pathogen
- Outcome
- rootlet yieldse4
- Direction
- lowere4
- Qualifier
- at all K levelse4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Nematode infection had no effect on taproot yields”
e4“lower rootlet yields from red clover at all K levels”
e0“Red clover and alfalfa were inoculated with Pratylenchus penetrans”
Claim · model-written summary
Nematode infection lowered alfalfa rootlet yields only at the highest K level in one experiment.
- Taxon
- alfalfaMedicago sativae5
- Organ / stage
- rootlete5
- Treatment
- Nematode infectione3
- Interactor
- Pratylenchus penetransPratylenchus penetranse0pathogen
- Outcome
- rootlet yieldse5
- Direction
- lowere5
- Qualifier
- only at the highest K level in one experimente5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Nematode infection had no effect on taproot yields”
e5“lower rootlet yields from alfalfa only at the highest K level in one experiment”
e0“Red clover and alfalfa were inoculated with Pratylenchus penetrans”
Claim · model-written summary
Nematode infection lowered alfalfa rootlet yields at all K levels but the lowest in a second experiment.
- Taxon
- alfalfaMedicago sativae5
- Organ / stage
- rootlete6
- Treatment
- Nematode infectione3
- Interactor
- Pratylenchus penetransPratylenchus penetranse0pathogen
- Outcome
- rootlet yieldse6
- Direction
- lowere6
- Qualifier
- at all but the lowest K level in a second experimente6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Nematode infection had no effect on taproot yields”
e5“lower rootlet yields from alfalfa only at the highest K level in one experiment”
e6“lower rootlet yields at all but the lowest K level in a second experiment”
e0“Red clover and alfalfa were inoculated with Pratylenchus penetrans”
Claim · model-written summary
Potassium fertilization increased yield of red clover and alfalfa.
- Taxon
- red clover and alfalfaMedicago sativaTrifolium pratensee7
- Treatment
- potassium fertilizatione7
- Outcome
- yielde7
- Direction
- enhancede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“potassium fertilization enhanced yield of red clover and alfalfa”
Claim · model-written summary
Yield increases from potassium fertilization were smaller in nematode-infested soil than in noninfested soil.
- Taxon
- red clover and alfalfaMedicago sativaTrifolium pratenset0
- Treatment
- increased K fertilizatione1
- Interactor
- Pratylenchus penetransPratylenchus penetranse0pathogen
- Outcome
- Yield increasese1
- Direction
- smallere1
- Qualifier
- nematode-infested soile1
- Comparator
- noninfested soile1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“red clover and alfalfa”
e1“Yield increases were smaller from increased K fertilization in nematode-infested soil than in noninfested soil”
e0“Red clover and alfalfa were inoculated with Pratylenchus penetrans”
Claim · model-written summary
Pratylenchus penetrans inoculation had little effect on the potassium content of red clover and alfalfa.
- Taxon
- red clover or alfalfaMedicago sativaTrifolium pratensee1
- Treatment
- inoculated with Pratylenchus penetranse0
- Interactor
- Pratylenchus penetransPratylenchus penetranse0pathogen
- Outcome
- K contente1
- Direction
- little effecte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“had little effect on the K content of red clover or alfalfa”
e0“Red clover and alfalfa were inoculated with Pratylenchus penetrans”
Claim · model-written summary
Stunting of plants from nematode infection resulted in less potassium removed from the soil.
- Taxon
- red clover and alfalfaMedicago sativaTrifolium pratenset0
- Outcome
- less K being removed from the soile1
- Qualifier
- stunting of plants from nematode infectione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“red clover and alfalfa”
e1“The stunting of plants from nematode infection resulted in less K being removed from the soil”
The same questions in other papers
fertilization · yield · Trifolium pratense (red clover)Results differ
16 papers in the same direction as this paper · 10 in the opposite direction
- negative
- no effect
- negative
23 papers more in this group
See all 27 papers →inoculation · nutrient: content · Medicago sativa (alfalfa)Results differ
5 papers in the same direction as this paper · 39 in the opposite direction
- positive
- positive
- positive
41 papers more in this group
See all 45 papers →inoculation · nutrient: content · Trifolium pratense (red clover)Positive and negative results
4 in the opposite direction
- positive
- positive
- positive
1 paper more in this group
See all 5 papers →fertilization · yield · Medicago sativa (alfalfa)Positive and negative results
150 papers in the same direction as this paper · 30 in the opposite direction · 3 reporting no difference from an alternative
- negative
- no effect
- no effect
180 papers more in this group
See all 184 papers →infection · Pratylenchus penetrans · Medicago sativa (alfalfa)Results agree
1 paper in the same direction as this paper
- negative
infection · Pratylenchus penetrans · Trifolium pratense (red clover)Results agree
1 paper in the same direction as this paper
- no effect
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.