Abstract
Abstract Investigators have suggested that soybean [ Glycine max (L.) Merr.] response to Mo was essentially a correction of N deficiency, and a series of experiments was conducted on acid soils (pH ranged from 4.5 to 5.6) to evaluate the suggestion. In the first series of experiments, yield response to Mo and N rates was studied for 3 years on soybean cultivars grown on Dyke 1 (Typic Rhodudult) and State 1 (Typic Hapludult) soils. Molybdenum was as effective in increasing yields as 134 kg N/ha in one experiment, 67 kg N/ha in a second experiment, and less effective than 67 kg N/ha in a third experiment. However, the combined effect of Mo plus N was greater in two out of three experiments than each element applied singly. In the second series of experiments, plant response to Mo and N rates was studied for 3 years on nodulating and nonnodulating isolines of soybeans grown on State 1, Etowah sl (Typic Palendult), and Cecil scl (Typic Hapludult) soils. Leaf N of nonnodulating soybeans was increased by N, but Mo was ineffective in all experiments on nonnodulating isolines. Molybdenum without N increased leaf N on nodulating types in all four experiments where leaf N was determined. Nitrogen without Mo increased leaf N of nodulating types in three of four experiments. Yields of nonnodulating isolines were not affected by Mo in any of the experiments, but Mo increased yields on nodulating isolines in four of five experiments. Average yields for five experiments with nodulating types indicated that Mo without N produced yields greater than did 67 kg N/ha but less than was produced by 134 and 201 kg N/ha. Results from four of eight exeriments with nodulating soybeans indicate that N efficiency may be improved by the addition of Mo. Results of these experiments indicate that the primary function of Mo was to correct a N deficiency and that enough soil Mo was available for nitrate reduction but not for symbiosis.
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Claims 14
Claim · model-written summary
Molybdenum was as effective as 134 kg N/ha in increasing yields in one experiment.
- Taxon
- Soybeans
Glycine maxt0 - Treatment
- Molybdenume1
- Outcome
- yieldse1
- Direction
- as effective in increasinge1
- Qualifier
- in one experimente1
- Comparator
- 134 kg N/hae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Yield and Leaf Nitrogen of Nodulating and Nonnodulating Soybeans”
e1“Molybdenum was as effective in increasing yields as 134 kg N/ha in one experiment, 67 kg N/ha in a second experiment, and less effective than 67 kg N/ha in a third experiment”
Claim · model-written summary
Molybdenum was as effective as 67 kg N/ha in increasing yields in a second experiment.
- Taxon
- SoybeansGlycine maxt0
- Treatment
- Molybdenume1
- Outcome
- yieldse1
- Direction
- as effective in increasinge1
- Qualifier
- in a second experimente1
- Comparator
- 67 kg N/hae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Yield and Leaf Nitrogen of Nodulating and Nonnodulating Soybeans”
e1“Molybdenum was as effective in increasing yields as 134 kg N/ha in one experiment, 67 kg N/ha in a second experiment, and less effective than 67 kg N/ha in a third experiment”
Claim · model-written summary
Molybdenum was less effective than 67 kg N/ha in increasing yields in a third experiment.
- Taxon
- SoybeansGlycine maxt0
- Treatment
- Molybdenume1
- Outcome
- yieldse1
- Direction
- less effectivee1
- Qualifier
- in a third experimente1
- Comparator
- 67 kg N/hae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Yield and Leaf Nitrogen of Nodulating and Nonnodulating Soybeans”
e1“Molybdenum was as effective in increasing yields as 134 kg N/ha in one experiment, 67 kg N/ha in a second experiment, and less effective than 67 kg N/ha in a third experiment”
Claim · model-written summary
The combined effect of Mo plus N was greater than each element applied singly in two of three experiments.
- Taxon
- SoybeansGlycine maxt0
- Treatment
- Mo plus Ne2
- Outcome
- combined effecte2
- Direction
- greatere2
- Qualifier
- in two out of three experimentse2
- Comparator
- each element applied singlye2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Yield and Leaf Nitrogen of Nodulating and Nonnodulating Soybeans”
e2“the combined effect of Mo plus N was greater in two out of three experiments than each element applied singly”
Claim · model-written summary
Leaf N of nonnodulating soybeans increased with N.
- Taxon
- SoybeansGlycine maxt0
- Material
- nonnodulating isolinese3
- Treatment
- Ne3
- Outcome
- Leaf Ne3
- Direction
- increasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Yield and Leaf Nitrogen of Nodulating and Nonnodulating Soybeans”
e3“Leaf N of nonnodulating soybeans was increased by N, but Mo was ineffective in all experiments on nonnodulating isolines”
Claim · model-written summary
Molybdenum was ineffective for leaf N in nonnodulating isolines.
- Taxon
- SoybeansGlycine maxt0
- Material
- nonnodulating isolinese3
- Treatment
- Moe3
- Outcome
- Leaf Ne3
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Yield and Leaf Nitrogen of Nodulating and Nonnodulating Soybeans”
e3“Leaf N of nonnodulating soybeans was increased by N, but Mo was ineffective in all experiments on nonnodulating isolines”
Claim · model-written summary
Molybdenum without N increased leaf N in nodulating types in all four experiments where it was determined.
- Taxon
- SoybeansGlycine maxt0
- Material
- nodulating typese4
- Treatment
- Molybdenum without Ne4
- Outcome
- leaf Ne4
- Direction
- increasede4
- Qualifier
- in all four experimentse4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Yield and Leaf Nitrogen of Nodulating and Nonnodulating Soybeans”
e4“Molybdenum without N increased leaf N on nodulating types in all four experiments where leaf N was determined”
Claim · model-written summary
Nitrogen without Mo increased leaf N in nodulating types in three of four experiments.
- Taxon
- SoybeansGlycine maxt0
- Material
- nodulating typese5
- Treatment
- Nitrogen without Moe5
- Outcome
- leaf Ne5
- Direction
- increasede5
- Qualifier
- in three of four experimentse5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Yield and Leaf Nitrogen of Nodulating and Nonnodulating Soybeans”
e5“Nitrogen without Mo increased leaf N of nodulating types in three of four experiments”
Claim · model-written summary
Molybdenum did not affect yields of nonnodulating isolines in any experiment.
- Taxon
- SoybeansGlycine maxt0
- Material
- nonnodulating isolinese6
- Treatment
- Moe6
- Outcome
- Yieldse6
- Direction
- no_changeinferrede6
- Qualifier
- in any of the experimentse6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Yield and Leaf Nitrogen of Nodulating and Nonnodulating Soybeans”
e6“Yields of nonnodulating isolines were not affected by Mo in any of the experiments, but Mo increased yields on nodulating isolines in four of five experiments”
Claim · model-written summary
Molybdenum increased yields of nodulating isolines in four of five experiments.
- Taxon
- SoybeansGlycine maxt0
- Material
- nodulating isolinese6
- Treatment
- Moe6
- Outcome
- yieldse6
- Direction
- increasede6
- Qualifier
- in four of five experimentse6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Yield and Leaf Nitrogen of Nodulating and Nonnodulating Soybeans”
e6“Yields of nonnodulating isolines were not affected by Mo in any of the experiments, but Mo increased yields on nodulating isolines in four of five experiments”
Claim · model-written summary
Molybdenum without N produced average yields greater than 67 kg N/ha in nodulating types across five experiments.
- Taxon
- SoybeansGlycine maxt0
- Material
- nodulating typese7
- Treatment
- Mo without Ne7
- Outcome
- Average yieldse7
- Direction
- greatere7
- Qualifier
- for five experimentse7
- Comparator
- 67 kg N/hae7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Yield and Leaf Nitrogen of Nodulating and Nonnodulating Soybeans”
e7“Average yields for five experiments with nodulating types indicated that Mo without N produced yields greater than did 67 kg N/ha but less than was produced by 134 and 201 kg N/ha”
Claim · model-written summary
Molybdenum without N produced average yields lower than 134 and 201 kg N/ha in nodulating types across five experiments.
- Taxon
- SoybeansGlycine maxt0
- Material
- nodulating typese7
- Treatment
- Mo without Ne7
- Outcome
- Average yieldse7
- Direction
- lesse7
- Qualifier
- for five experimentse7
- Comparator
- 134 and 201 kg N/hae7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Yield and Leaf Nitrogen of Nodulating and Nonnodulating Soybeans”
e7“Average yields for five experiments with nodulating types indicated that Mo without N produced yields greater than did 67 kg N/ha but less than was produced by 134 and 201 kg N/ha”
Claim · model-written summary
Molybdenum addition may improve N efficiency in nodulating soybeans.
- Taxon
- SoybeansGlycine maxt0
- Material
- nodulating soybeanse1
- Treatment
- addition of Moe1
- Outcome
- N efficiencye1
- Direction
- improvede1
- Qualifier
- may bee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Yield and Leaf Nitrogen of Nodulating and Nonnodulating Soybeans”
e1“Results from four of eight exeriments with nodulating soybeans indicate that N efficiency may be improved by the addition of Mo”
Claim · model-written summary
Molybdenum mainly corrects N deficiency in soybean, with enough soil Mo for nitrate reduction but not for symbiosis.
- Taxon
- SoybeansGlycine maxt0
- Treatment
- Moe0
- Outcome
- correct a N deficiencye0
- Qualifier
- nitrate reduction but not for symbiosise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Yield and Leaf Nitrogen of Nodulating and Nonnodulating Soybeans”
e0“the primary function of Mo was to correct a N deficiency and that enough soil Mo was available for nitrate reduction but not for symbiosis”
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