Abstract
Abstract Soybean (Glycine max (L.) Merr. cv Bragg) plants were grown in the greenhouse using a low‐Mn Leefield sand amended with 0, 2.5, 5, 20 and 50 yg Mn/g. The plants were inoculated and were primarily dependent on symbiotically fixed N. Measurements of DTPA‐extractable soil Mn, soil pH, leaf tissue Mn, top weight, top N content, and nodule weight, volume and number were made at 27, 42, 56, 63 and 69 days after planting. The DTPA extrac‐tant was a good predictor of leaf tissue Mn giving a highly significant (P = 0.01) overall correlation coefficient of 0.704 for this comparison. Because of an unexpected decline in soil pH from 6.8 to 6.0 and an associated increase in DTPA‐extractable Mn from 0.14 to 0.24 yg/g during preparation and handling prior to the first harvest time, Mn in the leaf tissue of the controls was never less than 21 yg/g. Since this concentration of Mn is above the deficient level, no significant responses in top growth, nitrogen fixation or nodule measurements were obtained from the addition of low rates of Mn. The highest Mn rate was only mildly toxic in terms of top growth and top N content, producing leaf tissue having Mn concentrations ranging from 171 to 180 yg/g at the last three harvest periods.
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 10
Claim · model-written summary
Extractable soil manganese predicted leaf tissue manganese with correlation 0.704.
- Taxon
- Soybean
Glycine maxe1 - Compound
- DTPA extrac‐tante0
- Outcome
- leaf tissue Mne0
- Value
- 0.704e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The DTPA extrac‐tant was a good predictor of leaf tissue Mn giving a highly significant (P = 0.01) overall correlation coefficient of 0.704 for this comparison.”
e1“Soybean (Glycine max (L.) Merr. cv Bragg) plants”
Claim · model-written summary
Soil pH declined from 6.8 to 6.0 before the first harvest.
- Taxon
- SoybeanGlycine maxe1
- Outcome
- soil pHe0
- Direction
- declinee0
- Value
- 6.8 to 6.0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an unexpected decline in soil pH from 6.8 to 6.0”
e1“Soybean (Glycine max (L.) Merr. cv Bragg) plants”
Claim · model-written summary
DTPA extractable soil manganese increased from 0.14 to 0.24 yg/g before the first harvest.
- Taxon
- SoybeanGlycine maxe1
- Outcome
- DTPA‐extractable Mne0
- Direction
- increasee0
- Value
- 0.14 to 0.24 yg/ge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an associated increase in DTPA‐extractable Mn from 0.14 to 0.24 yg/g”
e1“Soybean (Glycine max (L.) Merr. cv Bragg) plants”
Claim · model-written summary
Control soybean leaf manganese was never below 21 yg/g.
- Taxon
- SoybeanGlycine maxe1
- Outcome
- Mn in the leaf tissuee0
- Direction
- never less thane0
- Value
- 21 yg/ge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mn in the leaf tissue of the controls was never less than 21 yg/g”
e1“Soybean (Glycine max (L.) Merr. cv Bragg) plants”
Claim · model-written summary
Low manganese additions produced no significant top growth response.
- Taxon
- SoybeanGlycine maxe1
- Treatment
- addition of low rates of Mne0
- Outcome
- top growthe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no significant responses in top growth, nitrogen fixation or nodule measurements were obtained from the addition of low rates of Mn”
e1“Soybean (Glycine max (L.) Merr. cv Bragg) plants”
Claim · model-written summary
Low manganese additions produced no significant nitrogen fixation response.
- Taxon
- SoybeanGlycine maxe1
- Treatment
- addition of low rates of Mne0
- Outcome
- nitrogen fixatione0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no significant responses in top growth, nitrogen fixation or nodule measurements were obtained from the addition of low rates of Mn”
e1“Soybean (Glycine max (L.) Merr. cv Bragg) plants”
Claim · model-written summary
Low manganese additions produced no significant nodule measurement response.
- Taxon
- SoybeanGlycine maxe1
- Treatment
- addition of low rates of Mne0
- Outcome
- nodule measurementse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no significant responses in top growth, nitrogen fixation or nodule measurements were obtained from the addition of low rates of Mn”
e1“Soybean (Glycine max (L.) Merr. cv Bragg) plants”
Claim · model-written summary
The highest manganese rate was mildly toxic to soybean top growth.
- Taxon
- SoybeanGlycine maxe1
- Treatment
- highest Mn ratee0
- Outcome
- top growthe0
- Direction
- mildly toxice0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest Mn rate was only mildly toxic in terms of top growth and top N content”
e1“Soybean (Glycine max (L.) Merr. cv Bragg) plants”
Claim · model-written summary
The highest manganese rate was mildly toxic to soybean top nitrogen content.
- Taxon
- SoybeanGlycine maxe1
- Treatment
- highest Mn ratee0
- Outcome
- top N contente0
- Direction
- mildly toxice0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest Mn rate was only mildly toxic in terms of top growth and top N content”
e1“Soybean (Glycine max (L.) Merr. cv Bragg) plants”
Claim · model-written summary
At the highest manganese rate, soybean leaf tissue reached 171 to 180 yg/g in the final three harvests.
- Taxon
- SoybeanGlycine maxe2
- Organ / stage
- leaf tissuee0
- Treatment
- highest Mn ratee1
- Outcome
- Mn concentrationse0
- Value
- 171 to 180 yg/ge0
- Qualifier
- last three harvest periodse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“producing leaf tissue having Mn concentrations ranging from 171 to 180 yg/g at the last three harvest periods.”
e1“The highest Mn rate”
e2“Soybean (Glycine max (L.) Merr. cv Bragg) plants”
The same questions in other papers
manganese atom · growth · Glycine max (soybean)Results differ
17 papers in the same direction as this paper · 13 in the opposite direction
- positive
- positive
- positive
27 papers more in this group
See all 31 papers →manganese atom · symbiosis · Glycine max (soybean)Positive and negative results
3 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- no effect
2 papers more in this group
See all 6 papers →manganese atom · nutrient: content · Glycine max (soybean)Positive and negative results
10 papers in the same direction as this paper · 21 in the opposite direction
- positive
- positive
- positive
28 papers more in this group
See all 32 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.