Abstract
Single applications of ammonium lignosulfonate (ALS, ca. 6 t solids/ha) were made at four commercial potato fields in Ontario (sites K, V, W, and G in 1998, 1999, 2000, and 2000, respectively). Potato tubers were planted 2-4 weeks after ALS incorporation. The effects on potato scab, verticillium wilt, tuber yield, soil chemistry, and soil microbiology were determined in the year of application, and for a second crop at sites K (1999), V (2000), and G (2001). Potato scab severity was significantly reduced (50-80%) by ALS treatment in the year of application at all sites. Significantly less scab was present for the second crop at sites K and G. The incidence of Verticillium dahliae infected plants was also significantly decreased (40-50%) by ALS treatment at all sites in the year of application and for the second crop at site K. Ammonium lignosulfonate significantly increased total tuber yield by 2.5 times at site G in 2000. There was no effect on tuber yield at the other sites. However, marketable yield (tubers with <5% surface scab) was significantly increased three- to seven-fold over the control plots at all sites in the year of application. Although marketable yield was consistently higher in subsequent crops at all sites, it was only statistically significant at site G. Soil pH was immediately reduced following application of ALS by 0.4-0.6 units at all sites except site W, where it had no effect. Soil pH returned to control levels by the second season at all sites except site G, which remained one log unit lower than the control treatment. Numbers of soil microorganisms increased two- to eight-fold at all sites within weeks of ALS application. Fungal numbers increased the most and remained elevated for two seasons at site K compared with control plots. The results of this study clearly demonstrate that use of ALS as a soil amendment can significantly reduce the severity of potato scab and verticillium wilt in potato crops.
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Claims 14
Claim · model-written summary
ALS treatment significantly reduced potato scab severity by 50-80% in the year of application at all sites.
- Taxon
- potato
Solanum tuberosumt0 - Treatment
- ALS treatmente1
- Outcome
- Potato scab severitye1
- Direction
- reducede1
- Value
- 50-80%e1
- Qualifier
- in the year of applicatione1
- Setting
- all sitese1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Potato scab severity was significantly reduced (50-80%) by ALS treatment in the year of application at all sites”
t0“Reduction of potato scab and verticillium wilt with ammonium lignosulfonate soil amendment”
Claim · model-written summary
Potato scab was significantly lower for the second crop at sites K and G after ALS treatment.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- ammonium lignosulfonatet0
- Outcome
- scabe2
- Direction
- lesse2
- Qualifier
- for the second crope2
- Setting
- sites K and Ge2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Significantly less scab was present for the second crop at sites K and G”
t0“Reduction of potato scab and verticillium wilt with ammonium lignosulfonate soil amendment”
Claim · model-written summary
ALS treatment significantly decreased the incidence of Verticillium dahliae infected potato plants by 40-50% at all sites in the year of application and for the second crop at site K.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- ALS treatmente3
- Interactor
- Verticillium dahliae
Verticillium dahliaee3pathogen - Outcome
- incidence of Verticillium dahliae infected plantse3
- Direction
- decreasede3
- Value
- 40-50%e3
- Qualifier
- in the year of application and for the second crop at site Ke3
- Setting
- all sitese3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The incidence of Verticillium dahliae infected plants was also significantly decreased (40-50%) by ALS treatment at all sites in the year of application and for the second crop at site K”
t0“Reduction of potato scab and verticillium wilt with ammonium lignosulfonate soil amendment”
Claim · model-written summary
Ammonium lignosulfonate significantly increased total tuber yield by 2.5 times at site G in 2000.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- Ammonium lignosulfonatee4
- Outcome
- total tuber yielde4
- Direction
- increasede4
- Value
- 2.5 timese4
- Setting
- site G in 2000e4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Ammonium lignosulfonate significantly increased total tuber yield by 2.5 times at site G in 2000”
t0“Reduction of potato scab and verticillium wilt with ammonium lignosulfonate soil amendment”
Claim · model-written summary
ALS treatment had no effect on tuber yield at the other sites.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- ammonium lignosulfonatet0
- Outcome
- tuber yielde5
- Direction
- no effecte5
- Setting
- other sitese5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“There was no effect on tuber yield at the other sites”
t0“Reduction of potato scab and verticillium wilt with ammonium lignosulfonate soil amendment”
Claim · model-written summary
ALS treatment significantly increased marketable potato yield three- to seven-fold over control plots at all sites in the year of application.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- ammonium lignosulfonatet0
- Outcome
- marketable yielde6
- Direction
- increasede6
- Value
- three- to seven-folde6
- Qualifier
- tubers with <5% surface scabe6
- Comparator
- control plotse6
- Setting
- all sitese6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“marketable yield (tubers with <5% surface scab) was significantly increased three- to seven-fold over the control plots at all sites in the year of application”
t0“Reduction of potato scab and verticillium wilt with ammonium lignosulfonate soil amendment”
Claim · model-written summary
Marketable potato yield was consistently higher in subsequent crops at all sites after ALS treatment, without statistical significance across sites.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- ammonium lignosulfonatet0
- Outcome
- marketable yielde7
- Direction
- highere7
- Qualifier
- in subsequent cropse7
- Setting
- all sitese7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“Although marketable yield was consistently higher in subsequent crops at all sites”
t0“Reduction of potato scab and verticillium wilt with ammonium lignosulfonate soil amendment”
Claim · model-written summary
Marketable potato yield in subsequent crops was statistically significant at site G after ALS treatment.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- ammonium lignosulfonatet0
- Outcome
- marketable yielde7
- Qualifier
- statistically significante6
- Setting
- site Ge6
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“Although marketable yield was consistently higher in subsequent crops at all sites”
e6“it was only statistically significant at site G”
t0“Reduction of potato scab and verticillium wilt with ammonium lignosulfonate soil amendment”
Claim · model-written summary
ALS application immediately reduced soil pH by 0.4-0.6 units at all sites except site W.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- application of ALSe0
- Outcome
- Soil pHe0
- Direction
- reducede0
- Value
- 0.4-0.6 unitse0
- Qualifier
- immediatelye0
- Setting
- all sites except site We0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil pH was immediately reduced following application of ALS by 0.4-0.6 units at all sites except site W”
t0“Reduction of potato scab and verticillium wilt with ammonium lignosulfonate soil amendment”
Claim · model-written summary
ALS application had no effect on soil pH at site W.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- application of ALSe0
- Outcome
- Soil pHe0
- Direction
- no effecte0
- Setting
- site We0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil pH was immediately reduced following application of ALS by 0.4-0.6 units at all sites except site W, where it had no effect”
t0“Reduction of potato scab and verticillium wilt with ammonium lignosulfonate soil amendment”
Claim · model-written summary
Soil pH returned to control levels by the second season at all sites except site G after ALS treatment.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- ammonium lignosulfonatet0
- Outcome
- Soil pHe0
- Direction
- returned to control levelse0
- Qualifier
- by the second seasone0
- Comparator
- control levelse0
- Setting
- all sites except site Ge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil pH returned to control levels by the second season at all sites except site G, which remained one log unit lower than the control treatment”
t0“Reduction of potato scab and verticillium wilt with ammonium lignosulfonate soil amendment”
Claim · model-written summary
Soil pH at site G remained one log unit lower than the control treatment after ALS treatment.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- ammonium lignosulfonatet0
- Outcome
- Soil pHe0
- Direction
- lowere0
- Value
- one log unite0
- Comparator
- control treatmente0
- Setting
- site Ge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil pH returned to control levels by the second season at all sites except site G, which remained one log unit lower than the control treatment”
t0“Reduction of potato scab and verticillium wilt with ammonium lignosulfonate soil amendment”
Claim · model-written summary
ALS application increased soil microorganism numbers two- to eight-fold at all sites within weeks.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- ALS applicatione0
- Outcome
- Numbers of soil microorganismse0
- Direction
- increasede0
- Value
- two- to eight-folde0
- Qualifier
- within weekse0
- Setting
- all sitese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Numbers of soil microorganisms increased two- to eight-fold at all sites within weeks of ALS application”
t0“Reduction of potato scab and verticillium wilt with ammonium lignosulfonate soil amendment”
Claim · model-written summary
ALS treatment increased fungal numbers most at site K, and they remained elevated for two seasons compared with control plots.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- ammonium lignosulfonatet0
- Outcome
- Fungal numberse0
- Direction
- increasede0
- Qualifier
- remained elevated for two seasonse0
- Comparator
- control plotse0
- Setting
- site Ke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fungal numbers increased the most and remained elevated for two seasons at site K compared with control plots”
t0“Reduction of potato scab and verticillium wilt with ammonium lignosulfonate soil amendment”
The same questions in other papers
nitrogen · yield · Solanum tuberosum (potato)Results differ
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- no effect
- negative
- negative
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11 papers in the same direction as this paper · 4 in the opposite direction
- negative
- negative
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See all 16 papers →nitrogen · quality: postharvest · Solanum tuberosum (potato)Positive and negative results
22 papers in the same direction as this paper · 3 in the opposite direction · 2 reporting no difference from an alternative
- negative
- negative
- no effect
24 papers more in this group
See all 28 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.