Abstract
Experiments were conducted to determine the response to applied Mo and Cu of several crops grown on selected Podzol soils under greenhouse conditions. An application of Mo resulted in percent yield increases of 2000–5000 for cauliflower, 400–900 for spinach, 20–400 for barley, 90–400 for timothy, and 150–400 for alfalfa, depending on the soil series. The average Mo contents of these crops ranged from 0.05 to 0.85 from the untreated soils, and from 0.64 to 6.62 ppm from the Mo-treated soils, respectively. After the harvest of the last crop, 81 to 86% of the applied Mo was accounted for in the crop tissues and as exchangeable Mo in the soil. The original exchangeable Mo content of soils and the Mo content of crops from Mo-treated soils showed highly significant positive correlation coefficients with the yields of crops grown on untreated soils, and were negatively correlated with the yield response to Mo treatment.None of the four crops tested responded significantly in yield to applied Cu, although there was an increase in kernel yield of Hudson barley on three of the investigated soils. The Cu content of plant tissues, however, increased by about 50% in spinach and Herta barley straw, and 400% in Hudson barley kernels, as a result of Cu application. The average Cu contents of spinach, Herta and Hudson barley kernels, and alfalfa ranged from 2.5 to 8.5 and from 6.6 to 13.2 ppm from the untreated and Cu-treated soils, respectively. These Cu contents appeared to be in the optimum range. After the harvest of the last crop, 85 to 94% of the applied Cu was recovered from the plants and as exchangeable Cu in soils. There was no apparent relationship between the exchangeable Cu content of soils and the Cu content of the crops.
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Claims 16
Claim · model-written summary
Applied Mo raised cauliflower yield by 2000–5000 percent, depending on soil series.
- Taxon
- cauliflower
Brassica oleracea var. botrytise0 - Treatment
- Moe0
- Outcome
- yielde0
- Direction
- increasese0
- Value
- 2000–5000e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An application of Mo resulted in percent yield increases of 2000–5000 for cauliflower, 400–900 for spinach, 20–400 for barley, 90–400 for timothy, and 150–400 for alfalfa, depending on the soil series”
Claim · model-written summary
Applied Mo raised spinach yield by 400–900 percent.
Spinacia oleraceaNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An application of Mo resulted in percent yield increases of 2000–5000 for cauliflower, 400–900 for spinach, 20–400 for barley, 90–400 for timothy, and 150–400 for alfalfa, depending on the soil series”
Claim · model-written summary
Applied Mo raised barley yield by 20–400 percent.
.jpg?width=60){kind=small}
Hordeum vulgareNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“An application of Mo resulted in percent yield increases of 2000–5000 for cauliflower, 400–900 for spinach, 20–400 for barley, 90–400 for timothy, and 150–400 for alfalfa, depending on the soil series”
Claim · model-written summary
Applied Mo raised timothy yield by 90–400 percent.
Phleum pratenseNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An application of Mo resulted in percent yield increases of 2000–5000 for cauliflower, 400–900 for spinach, 20–400 for barley, 90–400 for timothy, and 150–400 for alfalfa, depending on the soil series”
Claim · model-written summary
Applied Mo raised alfalfa yield by 150–400 percent.
Medicago sativaNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An application of Mo resulted in percent yield increases of 2000–5000 for cauliflower, 400–900 for spinach, 20–400 for barley, 90–400 for timothy, and 150–400 for alfalfa, depending on the soil series”
Claim · model-written summary
Mo content in crops ranged from 0.05 to 0.85 on untreated soils and 0.64 to 6.62 ppm on treated soils.
Verbatim
e0“The average Mo contents of these crops ranged from 0.05 to 0.85 from the untreated soils, and from 0.64 to 6.62 ppm from the Mo-treated soils, respectively”
t0“CROP”
Claim · model-written summary
After harvest, 81 to 86% of applied Mo was in crop tissue or exchangeable soil Mo.
Verbatim
e0“After the harvest of the last crop, 81 to 86% of the applied Mo was accounted for in the crop tissues and as exchangeable Mo in the soil”
Claim · model-written summary
Exchangeable soil Mo and crop Mo under treatment correlated positively with untreated-soil crop yields.
Verbatim
e0“The original exchangeable Mo content of soils and the Mo content of crops from Mo-treated soils showed highly significant positive correlation coefficients with the yields of crops grown on untreated soils”
t0“CROP”
Claim · model-written summary
Exchangeable soil Mo and treated-crop Mo were negatively correlated with yield response to Mo.
Verbatim
e0“and were negatively correlated with the yield response to Mo treatment”
t0“CROP”
Claim · model-written summary
Applied Cu caused no significant yield response in four tested crops.
Verbatim
e0“None of the four crops tested responded significantly in yield to applied Cu”
t0“CROP”
Claim · model-written summary
Hudson barley kernel yield increased on three soils with applied Cu.
Verbatim
e0“there was an increase in kernel yield of Hudson barley on three of the investigated soils”
Claim · model-written summary
Applied Cu raised tissue Cu content by about 50% in spinach and Herta barley straw.
Verbatim
e0“The Cu content of plant tissues, however, increased by about 50% in spinach and Herta barley straw”
Claim · model-written summary
Applied Cu raised Hudson barley kernel Cu content by 400%.
Verbatim
e0“The Cu content of plant tissues, however, increased by about 50% in spinach and Herta barley straw, and 400% in Hudson barley kernels, as a result of Cu application”
Claim · model-written summary
Crop Cu content ranged from 2.5 to 8.5 ppm untreated and 6.6 to 13.2 ppm treated.
Verbatim
e0“The average Cu contents of spinach, Herta and Hudson barley kernels, and alfalfa ranged from 2.5 to 8.5 and from 6.6 to 13.2 ppm from the untreated and Cu-treated soils, respectively”
Claim · model-written summary
After harvest, 85 to 94% of applied Cu was recovered from plants or exchangeable soil Cu.
- Taxon
- plantsViridiplantaee0
- Outcome
- applied Cue0
- Value
- 85 to 94%e0
Verbatim
e0“After the harvest of the last crop, 85 to 94% of the applied Cu was recovered from the plants and as exchangeable Cu in soils”
Claim · model-written summary
Exchangeable soil Cu showed no apparent relationship to crop Cu content.
Verbatim
e0“There was no apparent relationship between the exchangeable Cu content of soils and the Cu content of the crops”
t0“CROP”
The same questions in other papers
molybdenum atom · yield · Hordeum vulgare (barley)Results differ
3 papers in the same direction as this paper · 2 in the opposite direction
- negative
- no effect
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See all 6 papers →molybdenum atom · yield · Medicago sativa (alfalfa)Results differ
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- no effect
- no effect
- no effect
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See all 26 papers →molybdenum atom · yield · Spinacia oleracea (spinach)Results agree
1 paper in the same direction as this paper
- positive
molybdenum atom · yield · Phleum pratense (timothy)Results agree
1 paper in the same direction as this paper
- positive
molybdenum atom · yield · Brassica oleracea (wild cabbage)Results agree
21 papers in the same direction as this paper
- positive
- positive
- positive
18 papers more in this group
See all 22 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.