Abstract
Five cropping regimes involving combinations of 2 legumes, alfalfa (Medicago sativa) and yellow sweet dover (Melilotus officinalis), 2 monocots, corn (Zea mays) and sudax (Sorghum halupeuse x Sorghum sudanese), and potato (Solanum tuberosum cv. Superior) were tested for their impact on potato yields in a field infested with Pratylenchus penetrans and Verticillium dahliae. No differences in 1990 tuber yields were observed among the five cropping regimes (P < 0.05). In 1991, yields following 1 year of corn, sudax, sweet clover, or alfalfa and 2 years of potato were not different from that of 3 years of continuous potato (P < 0.05). Two years of sweet clover or alfalfa followed by potato resulted in significantly increased potato tuber yields compared with 3 years of potato (P < 0.05). The 2-year legume and 2-year grain rotations resulted in lower P. penetrans population densities at the end of the 3-year rotation compared with 3 years of continuous potato (P < 0.01). The highest preplant V. dahliae population density (34 cfu/g soil), together with a P. penetrans density of 12/100 cm(3) of soil was in the sudax-sudax-potato cropping regime and resulted in the lowest potato tuber yield. The highest preplant P. penetrans population density (54/100 cm(3) soil), together with a V. dahliae population density of 19.5 cfu/g soil was observed in the corn-corn-potato cropping regime and resulted in the second lowest potato tuber yield in 1991. After 3 years, potato tuber yields were negatively related to preplant densities of V. dahliae (r(2) = 0.237), P. penetrans (r(2) = 0.175), and both pathogens (r(2) = 0.380). A comprehensive regression model was developed to isolate pathogen effects on potato yields from cropping regime effects encompassing all 10 cropping regimes (r(2) = 0.915).
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Claims 15
Claim · model-written summary
The five cropping regimes did not differ in 1990 potato tuber yield.
- Taxon
- potato
Solanum tuberosumt0 - Treatment
- five cropping regimese0
- Outcome
- 1990 tuber yieldse0
- Direction
- No differencese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No differences in 1990 tuber yields were observed among the five cropping regimes (P < 0.05).”
t0“potato (Solanum tuberosum cv. Superior)”
Claim · model-written summary
One year of corn before two potato years did not differ in yield from continuous potato.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- 1 year of corne0
- Outcome
- yieldse0
- Direction
- not differente0
- Comparator
- 3 years of continuous potatoe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 1991, yields following 1 year of corn, sudax, sweet clover, or alfalfa and 2 years of potato were not different from that of 3 years of continuous potato (P < 0.05).”
Claim · model-written summary
One year of sudax before two potato years did not differ in yield from continuous potato.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- sudaxe0
- Outcome
- yieldse0
- Direction
- not differente0
- Comparator
- 3 years of continuous potatoe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 1991, yields following 1 year of corn, sudax, sweet clover, or alfalfa and 2 years of potato were not different from that of 3 years of continuous potato (P < 0.05).”
Claim · model-written summary
One year of sweet clover before two potato years did not differ in yield from continuous potato.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- sweet clovere0
- Outcome
- yieldse0
- Direction
- not differente0
- Comparator
- 3 years of continuous potatoe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 1991, yields following 1 year of corn, sudax, sweet clover, or alfalfa and 2 years of potato were not different from that of 3 years of continuous potato (P < 0.05).”
Claim · model-written summary
One year of alfalfa before two potato years did not differ in yield from continuous potato.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- alfalfae0
- Outcome
- yieldse0
- Direction
- not differente0
- Comparator
- 3 years of continuous potatoe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 1991, yields following 1 year of corn, sudax, sweet clover, or alfalfa and 2 years of potato were not different from that of 3 years of continuous potato (P < 0.05).”
Claim · model-written summary
Two years of sweet clover increased subsequent potato tuber yield.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- Two years of sweet clovere0
- Outcome
- potato tuber yieldse0
- Direction
- increasede0
- Comparator
- 3 years of potatoe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two years of sweet clover or alfalfa followed by potato resulted in significantly increased potato tuber yields compared with 3 years of potato (P < 0.05).”
Claim · model-written summary
Two years of alfalfa increased subsequent potato tuber yield.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- alfalfae0
- Outcome
- potato tuber yieldse0
- Direction
- increasede0
- Comparator
- 3 years of potatoe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two years of sweet clover or alfalfa followed by potato resulted in significantly increased potato tuber yields compared with 3 years of potato (P < 0.05).”
Claim · model-written summary
Two-year legume rotations lowered P. penetrans density relative to continuous potato.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- 2-year legumee0
- Interactor
- P. penetrans
Pratylenchus penetranse0pathogen - Outcome
- P. penetrans population densitiese0
- Direction
- lowere0
- Comparator
- 3 years of continuous potatoe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 2-year legume and 2-year grain rotations resulted in lower P. penetrans population densities at the end of the 3-year rotation compared with 3 years of continuous potato (P < 0.01).”
Claim · model-written summary
Two-year grain rotations lowered P. penetrans density relative to continuous potato.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- 2-year graine0
- Interactor
- P. penetransPratylenchus penetranse0pathogen
- Outcome
- P. penetrans population densitiese0
- Direction
- lowere0
- Comparator
- 3 years of continuous potatoe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 2-year legume and 2-year grain rotations resulted in lower P. penetrans population densities at the end of the 3-year rotation compared with 3 years of continuous potato (P < 0.01).”
Claim · model-written summary
Sudax-sudax-potato had the lowest tuber yield with preplant V. dahliae at 34 cfu/g soil.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- sudax-sudax-potato cropping regimee0
- Interactor
- V. dahliae
Verticillium dahliaee0pathogen - Second interactor
- P. penetransPratylenchus penetranse0pathogen
- Outcome
- potato tuber yielde0
- Direction
- loweste0
- Qualifier
- 34 cfu/g soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest preplant V. dahliae population density (34 cfu/g soil), together with a P. penetrans density of 12/100 cm(3) of soil was in the sudax-sudax-potato cropping regime and resulted in the lowest potato tuber yield.”
Claim · model-written summary
Corn-corn-potato had the second lowest tuber yield with preplant P. penetrans at 54/100 cm(3) soil.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- corn-corn-potato cropping regimee0
- Interactor
- P. penetransPratylenchus penetranse0pathogen
- Second interactor
- V. dahliaeVerticillium dahliaee0pathogen
- Outcome
- potato tuber yielde0
- Direction
- second loweste0
- Qualifier
- 54/100 cm(3) soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest preplant P. penetrans population density (54/100 cm(3) soil), together with a V. dahliae population density of 19.5 cfu/g soil was observed in the corn-corn-potato cropping regime and resulted in the second lowest potato tuber yield in 1991.”
Claim · model-written summary
Potato yield was negatively related to preplant V. dahliae density, with r² 0.237.
- Taxon
- potatoSolanum tuberosume0
- Interactor
- V. dahliaeVerticillium dahliaee0pathogen
- Outcome
- potato tuber yieldse0
- Direction
- negatively relatede0
- Value
- 0.237e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“potato tuber yields were negatively related to preplant densities of V. dahliae (r(2) = 0.237)”
Claim · model-written summary
Potato yield was negatively related to preplant P. penetrans density, with r² 0.175.
- Taxon
- Solanum tuberosumSolanum tuberosumt0
- Interactor
- P. penetransPratylenchus penetranse0pathogen
- Outcome
- potato tuber yieldse1
- Direction
- decreaseinferrede0
- Value
- 0.175e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P. penetrans (r(2) = 0.175)”
t0“Solanum tuberosum Tuber Yields”
e1“Two years of sweet clover or alfalfa followed by potato resulted in significantly increased potato tuber yields compared with 3 years of potato (P < 0.05).”
Claim · model-written summary
Potato yield was negatively related to combined pathogen density, with r² 0.380.
- Taxon
- Solanum tuberosumSolanum tuberosumt0
- Outcome
- potato tuber yieldse1
- Direction
- decreaseinferrede0
- Value
- 0.380e0
Not reportedInteractor
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both pathogens (r(2) = 0.380)”
t0“Solanum tuberosum Tuber Yields”
e1“Two years of sweet clover or alfalfa followed by potato resulted in significantly increased potato tuber yields compared with 3 years of potato (P < 0.05).”
Claim · model-written summary
A regression model encompassing ten regimes explained potato yields with r² 0.915.
- Taxon
- potatoSolanum tuberosume0
- Outcome
- potato yieldse0
- Value
- 0.915e0
- Comparator
- cropping regime effectse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A comprehensive regression model was developed to isolate pathogen effects on potato yields from cropping regime effects encompassing all 10 cropping regimes (r(2) = 0.915).”
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See all 6 papers →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.