Paper · 1978 · Canadian Journal of Plant Science

EFFECTS OF MOLYBDENUM AND LIME ON THE YIELD AND MOLYBDENUM CONCENTRATION OF CROPS GROWN ON ACID SPHAGNUM PEAT SOIL

UMESH C. GUPTA; E. W. CHIPMAN; D. C. MACKAY

16
claims
34
verbatim quotes
16
citations
2
research areas
✓
Open access

Abstract

Experiments were conducted on a peat soil in the greenhouse to determine the effects of Mo and lime on the leaf tissue Mo concentration and yield of red clover (Trifolium pratense L.), onions (Allium cepa L.), cauliflower (Brassica oleracea var. botrytis L.), lettuce (Lactuca sativa var. capitata L.), and carrots (Daucus carota L.). Molybdenum treatments were: no added Mo, seed treated with Mo, and 4.5, 9.0, 18.0, 36.0, 72.0, and 144 ppm Mo added to the soil. Increases in soil pH from 4.3 up to 6.9 resulted in yield increases of all crops except lettuce. Seed treatment with Mo or small quantities of Mo added to the soil were necessary for optimum yield of all crops. For onions, cauliflower, and lettuce, the Mo seed treatment alone was sufficient. No visual abnormal leaf symptoms were observed with actual leaf tissue Mo concentrations of 192, 640 and 1,018 ppm in red clover, cauliflower, and onions, respectively. Liming generally increased the Mo concentration of crops, but the increase in concentration to applied Mo depended upon the level of lime. Synergism between Mo and lime was observed in tissue Mo concentration for onions and cauliflower. Antagonism between Mo and lime at high levels was observed in yields for cauliflower and carrots. Molybdenum applications of 4.5 ppm or higher resulted in red clover tissue containing greater than 10 ppm Mo, which when fed to cattle could be toxic.

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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 16

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Increasing soil pH from 4.3 to 6.9 increased red clover yield.

Taxon
red cloverTrifolium pratensee0
Treatment
soil pHe1
Outcome
yielde1
Direction
increasese1
Setting
greenhousee0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Trifolium pratense
Trifolium pratense · TaxonIvar Leidus · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Experiments were conducted on a peat soil in the greenhouse to determine the effects of Mo and lime on the leaf tissue Mo concentration and yield of red clover (Trifolium pratense L.), onions (Allium cepa L.), cauliflower (Brassica oleracea var. botrytis L.), lettuce (Lactuca sativa var. capitata L.), and carrots (Daucus carota L.)”

✓ located verbatim in the source · abstract, characters 0–333 · show in text ↑
e1

“Increases in soil pH from 4.3 up to 6.9 resulted in yield increases of all crops except lettuce”

✓ located verbatim in the source · abstract, characters 464–559 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Increasing soil pH from 4.3 to 6.9 increased onion yield.

Taxon
onionsAllium cepae0
Treatment
soil pHe1
Outcome
yielde1
Direction
increasese1
Setting
greenhousee0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Allium cepa
Allium cepa · TaxonMehdi · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Experiments were conducted on a peat soil in the greenhouse to determine the effects of Mo and lime on the leaf tissue Mo concentration and yield of red clover (Trifolium pratense L.), onions (Allium cepa L.), cauliflower (Brassica oleracea var. botrytis L.), lettuce (Lactuca sativa var. capitata L.), and carrots (Daucus carota L.)”

✓ located verbatim in the source · abstract, characters 0–333 · show in text ↑
e1

“Increases in soil pH from 4.3 up to 6.9 resulted in yield increases of all crops except lettuce”

✓ located verbatim in the source · abstract, characters 464–559 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Increasing soil pH from 4.3 to 6.9 increased cauliflower yield.

Treatment
soil pHe1
Outcome
yielde1
Direction
increasese1
Setting
greenhousee0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Brassica oleracea var. botrytis
Brassica oleracea var. botrytis · TaxonSusan Slater · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Experiments were conducted on a peat soil in the greenhouse to determine the effects of Mo and lime on the leaf tissue Mo concentration and yield of red clover (Trifolium pratense L.), onions (Allium cepa L.), cauliflower (Brassica oleracea var. botrytis L.), lettuce (Lactuca sativa var. capitata L.), and carrots (Daucus carota L.)”

✓ located verbatim in the source · abstract, characters 0–333 · show in text ↑
e1

“Increases in soil pH from 4.3 up to 6.9 resulted in yield increases of all crops except lettuce”

✓ located verbatim in the source · abstract, characters 464–559 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Increasing soil pH from 4.3 to 6.9 increased carrot yield.

Taxon
carrotsDaucus carotae0
Treatment
soil pHe1
Outcome
yielde1
Direction
increasese1
Setting
greenhousee0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Daucus carota
Daucus carota · TaxonZeynel Cebeci · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Experiments were conducted on a peat soil in the greenhouse to determine the effects of Mo and lime on the leaf tissue Mo concentration and yield of red clover (Trifolium pratense L.), onions (Allium cepa L.), cauliflower (Brassica oleracea var. botrytis L.), lettuce (Lactuca sativa var. capitata L.), and carrots (Daucus carota L.)”

✓ located verbatim in the source · abstract, characters 0–333 · show in text ↑
e1

“Increases in soil pH from 4.3 up to 6.9 resulted in yield increases of all crops except lettuce”

✓ located verbatim in the source · abstract, characters 464–559 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

For onions, the Mo seed treatment alone was sufficient for optimum yield.

Taxon
onionsAllium cepae0
Treatment
Mo seed treatmente2
Outcome
optimum yielde3
Direction
sufficiente2
Setting
greenhousee0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Allium cepa
Allium cepa · TaxonMehdi · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Experiments were conducted on a peat soil in the greenhouse to determine the effects of Mo and lime on the leaf tissue Mo concentration and yield of red clover (Trifolium pratense L.), onions (Allium cepa L.), cauliflower (Brassica oleracea var. botrytis L.), lettuce (Lactuca sativa var. capitata L.), and carrots (Daucus carota L.)”

✓ located verbatim in the source · abstract, characters 0–333 · show in text ↑
e2

“For onions, cauliflower, and lettuce, the Mo seed treatment alone was sufficient”

✓ located verbatim in the source · abstract, characters 675–755 · show in text ↑
e3

“Seed treatment with Mo or small quantities of Mo added to the soil were necessary for optimum yield of all crops”

✓ located verbatim in the source · abstract, characters 561–673 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

For cauliflower, the Mo seed treatment alone was sufficient for optimum yield.

Treatment
Mo seed treatmente2
Outcome
optimum yielde3
Direction
sufficiente2
Setting
greenhousee0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Brassica oleracea var. botrytis
Brassica oleracea var. botrytis · TaxonSusan Slater · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Experiments were conducted on a peat soil in the greenhouse to determine the effects of Mo and lime on the leaf tissue Mo concentration and yield of red clover (Trifolium pratense L.), onions (Allium cepa L.), cauliflower (Brassica oleracea var. botrytis L.), lettuce (Lactuca sativa var. capitata L.), and carrots (Daucus carota L.)”

✓ located verbatim in the source · abstract, characters 0–333 · show in text ↑
e2

“For onions, cauliflower, and lettuce, the Mo seed treatment alone was sufficient”

✓ located verbatim in the source · abstract, characters 675–755 · show in text ↑
e3

“Seed treatment with Mo or small quantities of Mo added to the soil were necessary for optimum yield of all crops”

✓ located verbatim in the source · abstract, characters 561–673 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

For lettuce, the Mo seed treatment alone was sufficient for optimum yield.

Taxon
lettuceLactuca sativae0
Treatment
Mo seed treatmente2
Outcome
optimum yielde3
Direction
sufficiente2
Setting
greenhousee0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Lactuca sativa
Lactuca sativa · Taxonen:User:Geographer · CC BY 1.0 · Wikimedia Commons ↗

Verbatim

e0

“Experiments were conducted on a peat soil in the greenhouse to determine the effects of Mo and lime on the leaf tissue Mo concentration and yield of red clover (Trifolium pratense L.), onions (Allium cepa L.), cauliflower (Brassica oleracea var. botrytis L.), lettuce (Lactuca sativa var. capitata L.), and carrots (Daucus carota L.)”

✓ located verbatim in the source · abstract, characters 0–333 · show in text ↑
e2

“For onions, cauliflower, and lettuce, the Mo seed treatment alone was sufficient”

✓ located verbatim in the source · abstract, characters 675–755 · show in text ↑
e3

“Seed treatment with Mo or small quantities of Mo added to the soil were necessary for optimum yield of all crops”

✓ located verbatim in the source · abstract, characters 561–673 · show in text ↑
Observationobservedoriginal resultno effectmeasured

Claim · model-written summary

No visual abnormal leaf symptoms occurred in red clover at leaf tissue Mo of 192.

Taxon
red cloverTrifolium pratensee0
Outcome
visual abnormal leaf symptomse4
Value
192e4
Qualifier
actual leaf tissue Mo concentrationse4
Setting
greenhousee0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Trifolium pratense
Trifolium pratense · TaxonIvar Leidus · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Experiments were conducted on a peat soil in the greenhouse to determine the effects of Mo and lime on the leaf tissue Mo concentration and yield of red clover (Trifolium pratense L.), onions (Allium cepa L.), cauliflower (Brassica oleracea var. botrytis L.), lettuce (Lactuca sativa var. capitata L.), and carrots (Daucus carota L.)”

✓ located verbatim in the source · abstract, characters 0–333 · show in text ↑
e4

“No visual abnormal leaf symptoms were observed with actual leaf tissue Mo concentrations of 192, 640 and 1,018 ppm in red clover, cauliflower, and onions”

✓ located verbatim in the source · abstract, characters 757–910 · show in text ↑
Observationobservedoriginal resultno effectmeasured

Claim · model-written summary

No visual abnormal leaf symptoms occurred in cauliflower at leaf tissue Mo of 640.

Outcome
visual abnormal leaf symptomse4
Value
640e4
Qualifier
actual leaf tissue Mo concentrationse4
Setting
greenhousee0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Brassica oleracea var. botrytis
Brassica oleracea var. botrytis · TaxonSusan Slater · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Experiments were conducted on a peat soil in the greenhouse to determine the effects of Mo and lime on the leaf tissue Mo concentration and yield of red clover (Trifolium pratense L.), onions (Allium cepa L.), cauliflower (Brassica oleracea var. botrytis L.), lettuce (Lactuca sativa var. capitata L.), and carrots (Daucus carota L.)”

✓ located verbatim in the source · abstract, characters 0–333 · show in text ↑
e4

“No visual abnormal leaf symptoms were observed with actual leaf tissue Mo concentrations of 192, 640 and 1,018 ppm in red clover, cauliflower, and onions”

✓ located verbatim in the source · abstract, characters 757–910 · show in text ↑
Observationobservedoriginal resultno effectmeasured

Claim · model-written summary

No visual abnormal leaf symptoms occurred in onions at leaf tissue Mo of 1,018.

Taxon
onionsAllium cepae0
Outcome
visual abnormal leaf symptomse4
Value
1,018e4
Qualifier
actual leaf tissue Mo concentrationse4
Setting
greenhousee0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Allium cepa
Allium cepa · TaxonMehdi · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Experiments were conducted on a peat soil in the greenhouse to determine the effects of Mo and lime on the leaf tissue Mo concentration and yield of red clover (Trifolium pratense L.), onions (Allium cepa L.), cauliflower (Brassica oleracea var. botrytis L.), lettuce (Lactuca sativa var. capitata L.), and carrots (Daucus carota L.)”

✓ located verbatim in the source · abstract, characters 0–333 · show in text ↑
e4

“No visual abnormal leaf symptoms were observed with actual leaf tissue Mo concentrations of 192, 640 and 1,018 ppm in red clover, cauliflower, and onions”

✓ located verbatim in the source · abstract, characters 757–910 · show in text ↑
Associationobservedoriginal resultmeasured

Claim · model-written summary

Mo and lime showed synergism in tissue Mo concentration of onions.

Taxon
onionsAllium cepae0
Treatment
Mo and limee6
Outcome
tissue Mo concentratione6
Qualifier
Synergism between Mo and limee6
Setting
greenhousee0

Not reportedDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Allium cepa
Allium cepa · TaxonMehdi · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Experiments were conducted on a peat soil in the greenhouse to determine the effects of Mo and lime on the leaf tissue Mo concentration and yield of red clover (Trifolium pratense L.), onions (Allium cepa L.), cauliflower (Brassica oleracea var. botrytis L.), lettuce (Lactuca sativa var. capitata L.), and carrots (Daucus carota L.)”

✓ located verbatim in the source · abstract, characters 0–333 · show in text ↑
e6

“Synergism between Mo and lime was observed in tissue Mo concentration for onions and cauliflower”

✓ located verbatim in the source · abstract, characters 1065–1161 · show in text ↑
Associationobservedoriginal resultmeasured

Claim · model-written summary

Mo and lime showed synergism in tissue Mo concentration of cauliflower.

Treatment
Mo and limee6
Outcome
tissue Mo concentratione6
Qualifier
Synergism between Mo and limee6
Setting
greenhousee0

Not reportedDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Brassica oleracea var. botrytis
Brassica oleracea var. botrytis · TaxonSusan Slater · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Experiments were conducted on a peat soil in the greenhouse to determine the effects of Mo and lime on the leaf tissue Mo concentration and yield of red clover (Trifolium pratense L.), onions (Allium cepa L.), cauliflower (Brassica oleracea var. botrytis L.), lettuce (Lactuca sativa var. capitata L.), and carrots (Daucus carota L.)”

✓ located verbatim in the source · abstract, characters 0–333 · show in text ↑
e6

“Synergism between Mo and lime was observed in tissue Mo concentration for onions and cauliflower”

✓ located verbatim in the source · abstract, characters 1065–1161 · show in text ↑
Associationobservedoriginal resultmeasured

Claim · model-written summary

Mo and lime at high levels showed antagonism in yield of cauliflower.

Treatment
Mo and limee7
Outcome
yieldse7
Qualifier
Antagonism between Mo and lime at high levelse7
Setting
greenhousee0

Not reportedDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Brassica oleracea var. botrytis
Brassica oleracea var. botrytis · TaxonSusan Slater · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Experiments were conducted on a peat soil in the greenhouse to determine the effects of Mo and lime on the leaf tissue Mo concentration and yield of red clover (Trifolium pratense L.), onions (Allium cepa L.), cauliflower (Brassica oleracea var. botrytis L.), lettuce (Lactuca sativa var. capitata L.), and carrots (Daucus carota L.)”

✓ located verbatim in the source · abstract, characters 0–333 · show in text ↑
e7

“Antagonism between Mo and lime at high levels was observed in yields for cauliflower and carrots. Molybdenum applications of 4.5 ppm or higher resulted in red clover tissue containing greater than 10 ppm Mo, which when fed to cattle could be toxic”

✓ located verbatim in the source · abstract, characters 1163–1410 · show in text ↑
Associationobservedoriginal resultmeasured

Claim · model-written summary

Mo and lime at high levels showed antagonism in yield of carrots.

Taxon
carrotsDaucus carotae0
Treatment
Mo and limee7
Outcome
yieldse7
Qualifier
Antagonism between Mo and lime at high levelse7
Setting
greenhousee0

Not reportedDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Daucus carota
Daucus carota · TaxonZeynel Cebeci · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Experiments were conducted on a peat soil in the greenhouse to determine the effects of Mo and lime on the leaf tissue Mo concentration and yield of red clover (Trifolium pratense L.), onions (Allium cepa L.), cauliflower (Brassica oleracea var. botrytis L.), lettuce (Lactuca sativa var. capitata L.), and carrots (Daucus carota L.)”

✓ located verbatim in the source · abstract, characters 0–333 · show in text ↑
e7

“Antagonism between Mo and lime at high levels was observed in yields for cauliflower and carrots. Molybdenum applications of 4.5 ppm or higher resulted in red clover tissue containing greater than 10 ppm Mo, which when fed to cattle could be toxic”

✓ located verbatim in the source · abstract, characters 1163–1410 · show in text ↑
Intervention effectauthor interpretationoriginal resultnegativemeasured

Claim · model-written summary

Molybdenum applications of 4.5 ppm or higher gave red clover tissue with Mo greater than 10 ppm, which could be toxic to cattle.

Taxon
red cloverTrifolium pratensee0
Treatment
Molybdenum applications of 4.5 ppm or highere7
Outcome
red clover tissuee7
Direction
greater thane7
Value
10 ppme7
Qualifier
which when fed to cattle could be toxice7
Setting
greenhousee0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Trifolium pratense
Trifolium pratense · TaxonIvar Leidus · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Experiments were conducted on a peat soil in the greenhouse to determine the effects of Mo and lime on the leaf tissue Mo concentration and yield of red clover (Trifolium pratense L.), onions (Allium cepa L.), cauliflower (Brassica oleracea var. botrytis L.), lettuce (Lactuca sativa var. capitata L.), and carrots (Daucus carota L.)”

✓ located verbatim in the source · abstract, characters 0–333 · show in text ↑
e7

“Antagonism between Mo and lime at high levels was observed in yields for cauliflower and carrots. Molybdenum applications of 4.5 ppm or higher resulted in red clover tissue containing greater than 10 ppm Mo, which when fed to cattle could be toxic”

✓ located verbatim in the source · abstract, characters 1163–1410 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Liming generally increased the molybdenum concentration of the crops.

Taxon
cropse5
Treatment
Liminge5
Outcome
Mo concentratione5
Direction
increasede5

Not reportedComparator

Verbatim

e5

“Liming generally increased the Mo concentration of crops, but the increase in concentration to applied Mo depended upon the level of lime”

✓ located verbatim in the source · abstract, characters 926–1063 · show in text ↑

molybdenum atom · yield · Allium cepa (onion)Results agree

2 papers: 2 positive, 0 negative or no effect

1 paper in the same direction as this paper

  1. positive
See all 2 papers →

molybdenum atom · yield · Lactuca sativa (garden lettuce)Results agree

6 papers: 6 positive, 0 negative or no effect

5 papers in the same direction as this paper

  1. positive
  2. positive
  3. positive

2 papers more in this group

See all 6 papers →

molybdenum atom · yield · Brassica oleracea (wild cabbage)Results agree

22 papers: 22 positive, 0 negative or no effect

21 papers in the same direction as this paper

  1. positive
  2. positive
  3. positive

18 papers more in this group

See all 22 papers →

seed treatment · yield · Lactuca sativa (garden lettuce)Positive and negative results

2 papers: 1 positive, 1 negative or no effect

1 in the opposite direction

  1. negative
See all 2 papers →

ph · yield · Brassica oleracea (wild cabbage)Positive and negative results

4 papers: 2 positive, 2 negative or no effect

1 paper in the same direction as this paper · 2 in the opposite direction

  1. no effect
  2. negative
  3. positive
See all 4 papers →

seed treatment · yield · Brassica oleracea (wild cabbage)Positive and negative results

10 papers: 8 positive, 2 negative or no effect

7 papers in the same direction as this paper · 2 in the opposite direction

  1. no effect
  2. no effect
  3. positive

6 papers more in this group

See all 10 papers →

seed treatment · yield · Allium cepa (onion)Positive and negative results

13 papers: 12 positive, 1 negative or no effect

11 papers in the same direction as this paper · 1 in the opposite direction

  1. no effect
  2. positive
  3. positive

9 papers more in this group

See all 13 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.