Abstract
Abstract Potatoes (Solarium tuberosum L.) and carrots (Daucus carota L.) were grown in the field on Tasmanian ferrosols (humic eutrudox) which had been limed either 2, 3, or 5 years earlier, and where tuber cadmium (Cd) concentrations in potatoes grown a few months after the liming had shown no lime response. In the current crops lime decreased potato tuber Cd by about 30% and carrot root Cd by about 50%. We attributed the decrease to more even and deeper mixing of the lime with the soil by the harvest of the first potatoes. Phosphorus (P) fertilizer residues from the earlier potato crops did not significantly affect tuber or root Cd, but there was a positive effect at 1 site where some high Cd P fertilizer had earlier been used. Neither lime nor P fertilizer residues affected potato or carrot yields. Analysis at one site of potato tubers from the upper part of the soil ridges showed that they had slightly higher Cd concentrations than did deeper tubers near the fertilizer band, whether P fertilizer was in the band or not. This suggests that either the Cd in the fertilizer band was relatively unimportant as a Cd source for the current crop, or that Cd was redistributed within the plant during the season, or both. Liming may be a suitable medium to long‐term strategy for decreasing Cd uptake by root crops, but site to site and seasonal variation can still be great, and knowledge of other major influences is needed for assurance of produce quality. Our observations need to be extended to sites which gives rise to higher Cd concentrations in agricultural produce, and to other soil types. Potato common scab was severe in the limed plots at one site. However, this site had grown 3 potato crops in 5 years, which probably exacerbated the disease. Potato processors in Tasmania demand a minimum of 5 years between successive crops which should slow any build up of scab due to liming, but more work on possible interactions between lime and rotation length on scab incidence is needed before liming can be recommended as a Cd control measure for potatoes.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 11
Claim · model-written summary
Residual lime decreased potato tuber Cd by about 30%.
- Taxon
- Potatoes
Solanum tuberosume1 - Treatment
- limee0
- Outcome
- potato tuber Cde0
- Direction
- decreasede0
- Value
- about 30%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lime decreased potato tuber Cd by about 30%”
e1“Potatoes (Solarium tuberosum L.)”
Claim · model-written summary
Residual lime decreased carrot root Cd by about 50%.
- Taxon
- carrots
Daucus carotae1 - Treatment
- limee0
- Outcome
- carrot root Cde0
- Direction
- decreasede0
- Value
- about 50%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lime decreased potato tuber Cd by about 30% and carrot root Cd by about 50%”
e1“carrots (Daucus carota L.)”
Claim · model-written summary
Phosphorus fertilizer residues did not significantly affect potato tuber Cd.
- Taxon
- PotatoesSolanum tuberosume1
- Treatment
- Phosphorus (P) fertilizer residuese0
- Outcome
- tuber Cde2
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus (P) fertilizer residues from the earlier potato crops did not significantly affect tuber or root Cd”
e1“Potatoes (Solarium tuberosum L.)”
e2“lime decreased potato tuber Cd by about 30%”
Claim · model-written summary
Phosphorus fertilizer residues did not significantly affect carrot root Cd.
- Taxon
- carrotsDaucus carotae1
- Treatment
- Phosphorus (P) fertilizer residuese0
- Outcome
- root Cde0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus (P) fertilizer residues from the earlier potato crops did not significantly affect tuber or root Cd”
e1“carrots (Daucus carota L.)”
Claim · model-written summary
At one site with earlier high Cd P fertilizer use, P residues had a positive effect on crop Cd.
- Taxon
- PotatoesSolanum tuberosume1
- Treatment
- high Cd P fertilizere0
- Outcome
- positive effecte0
- Direction
- positivee0
- Setting
- 1 sitee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was a positive effect at 1 site where some high Cd P fertilizer had earlier been used”
e1“Potatoes (Solarium tuberosum L.) and carrots (Daucus carota L.)”
Claim · model-written summary
Neither lime nor phosphorus residues affected potato yield.
- Taxon
- PotatoesSolanum tuberosume1
- Treatment
- lime nor P fertilizer residuese0
- Outcome
- potato or carrot yieldse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Neither lime nor P fertilizer residues affected potato or carrot yields”
e1“Potatoes (Solarium tuberosum L.)”
Claim · model-written summary
Neither lime nor phosphorus residues affected carrot yield.
- Taxon
- carrotsDaucus carotae1
- Treatment
- lime nor P fertilizer residuese0
- Outcome
- potato or carrot yieldse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Neither lime nor P fertilizer residues affected potato or carrot yields”
e1“carrots (Daucus carota L.)”
Claim · model-written summary
Upper ridge potato tubers had slightly higher Cd than deeper tubers.
- Taxon
- PotatoesSolanum tuberosume1
- Outcome
- Cd concentrationse0
- Direction
- highere0
- Comparator
- deeper tubers near the fertilizer bande0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“potato tubers from the upper part of the soil ridges showed that they had slightly higher Cd concentrations than did deeper tubers near the fertilizer band”
e1“Potatoes (Solarium tuberosum L.)”
Claim · model-written summary
Potato common scab was severe in limed plots at one site.
- Taxon
- PotatoesSolanum tuberosume1
- Treatment
- limed plotse0
- Outcome
- Potato common scab was severee0
- Setting
- one sitee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Potato common scab was severe in the limed plots at one site”
e1“Potatoes (Solarium tuberosum L.)”
Claim · model-written summary
Liming may reduce Cd uptake by root crops over the medium to long term, subject to variation.
Verbatim
e0“Liming may be a suitable medium to long‐term strategy for decreasing Cd uptake by root crops, but site to site and seasonal variation can still be great”
Claim · model-written summary
The authors call for more work on lime, rotation length and scab before recommending lime for potato Cd control.
- Taxon
- potatoesSolanum tuberosume0
- Outcome
- more work on possible interactions between lime and rotation length on scab incidence is needede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“more work on possible interactions between lime and rotation length on scab incidence is needed before liming can be recommended as a Cd control measure for potatoes”
The same questions in other papers
lime · yield · Daucus carota (carrot)Results differ
3 in the opposite direction
- positive
- positive
- positive
lime · yield · Solanum tuberosum (potato)Results differ
3 papers in the same direction as this paper · 8 in the opposite direction
- positive
- positive
- positive
8 papers more in this group
See all 12 papers →fertilization · yield · Daucus carota (carrot)Results differ
12 papers in the same direction as this paper · 108 in the opposite direction
- positive
- positive
- positive
117 papers more in this group
See all 121 papers →lime · nutrient: content · Daucus carota (carrot)Positive and negative results
1 reporting no difference from an alternative
- no effect
lime · nutrient: content · Solanum tuberosum (potato)Positive and negative results
3 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- no effect
- positive
2 papers more in this group
See all 6 papers →phosphorus · nutrient: content · Solanum tuberosum (potato)Positive and negative results
8 papers in the same direction as this paper · 16 in the opposite direction
- positive
- positive
- positive
21 papers more in this group
See all 25 papers →fertilization · nutrient: content · Daucus carota (carrot)Positive and negative results
9 papers in the same direction as this paper · 19 in the opposite direction
- positive
- positive
- positive
25 papers more in this group
See all 29 papers →fertilization · nutrient: content · Solanum tuberosum (potato)Positive and negative results
25 papers in the same direction as this paper · 97 in the opposite direction
- positive
- positive
- positive
119 papers more in this group
See all 123 papers →8 of 10 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
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.