Abstract
Abstract Field experiments were conducted on two acid, sandy loam soils of northern Indiana (Newton, pH 4.7 and Tracy, pH 4.8) to determine the influence of magnesium, calcitic lime, and potash on yields, magnesium deficiency symptoms, and leaf composition of corn. Treatments included factorial combinations of 100 and 500 pounds K 2 O, 0 and 72 pounds Mg (as MgSO 4 · 7 H 2 O), and 0 and 6 tons of calcitic bag lime per acre. On the Newton soil both potash treatments induced widespread magnesium deficiency symptoms. Their identity was confirmed by low magnesium and high potassium contents of leaves. The occurrence of magnesium deficiency symptoms was not accompanied by a reduction in corn yield. Magnesium additions essentially prevented development of the symptoms, significantly increased the percentage of magnesium, and decreased the percentage of potassium in leaves, but did not affect yields. On the Newton soil calcitic lime produced significant yield increases, but did not significantly affect K‐induced magnesium deficiency symptoms nor percentage of magnesium in the leaves. On the Tracy soil only a few plants showed magnesium deficiencies, and none of the potash, lime, or magnesium treatments significantly affected yields. The evidence indicates that yield‐limiting magnesium deficiency symptoms with corn are not likely to result from the use of calcitic lime and potash in amounts presently recommended on these soils.
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Claims 15
Claim · model-written summary
Both potash treatments induced widespread magnesium deficiency symptoms on Newton soil.
- Taxon
- Corn
Zea mays subsp. mayst0 - Treatment
- both potash treatmentse0
- Outcome
- magnesium deficiency symptomse0
- Direction
- inducede0
- Setting
- Newton soile0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“On the Newton soil both potash treatments induced widespread magnesium deficiency symptoms.”
t0“Corn”
Claim · model-written summary
Deficient leaves had low magnesium and high potassium contents.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- low magnesium and high potassium contents of leavese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Their identity was confirmed by low magnesium and high potassium contents of leaves.”
t0“Corn”
Claim · model-written summary
Magnesium deficiency symptoms did not accompany reduced corn yield.
- Taxon
- cornZea mays subsp. mayse0
- Outcome
- corn yielde0
- Direction
- not accompanied by a reductione0
- Qualifier
- magnesium deficiency symptomse0
Not reportedMaterialGeneCompoundOrgan / stageInteractorTreatmentComparatorSetting
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The occurrence of magnesium deficiency symptoms was not accompanied by a reduction in corn yield.”
Claim · model-written summary
Magnesium additions prevented deficiency symptoms.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- Magnesium additionse0
- Outcome
- development of the symptomse0
- Direction
- preventede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Magnesium additions essentially prevented development of the symptoms, significantly increased the percentage of magnesium, and decreased the percentage of potassium in leaves, but did not affect yields.”
t0“Corn”
Claim · model-written summary
Magnesium additions increased leaf magnesium percentage significantly.
- Taxon
- CornZea mays subsp. mayst0
- Organ / stage
- leavese0
- Treatment
- Magnesium additionse0
- Outcome
- percentage of magnesiume0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Magnesium additions essentially prevented development of the symptoms, significantly increased the percentage of magnesium, and decreased the percentage of potassium in leaves, but did not affect yields.”
t0“Corn”
Claim · model-written summary
Magnesium additions decreased leaf potassium percentage.
- Taxon
- CornZea mays subsp. mayst0
- Organ / stage
- leavese0
- Treatment
- Magnesium additionse0
- Outcome
- percentage of potassiume0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Magnesium additions essentially prevented development of the symptoms, significantly increased the percentage of magnesium, and decreased the percentage of potassium in leaves, but did not affect yields.”
t0“Corn”
Claim · model-written summary
Magnesium additions did not affect yields.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- Magnesium additionse0
- Outcome
- yieldse0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Magnesium additions essentially prevented development of the symptoms, significantly increased the percentage of magnesium, and decreased the percentage of potassium in leaves, but did not affect yields.”
t0“Corn”
Claim · model-written summary
Calcitic lime significantly increased yield on Newton soil.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- calcitic limee0
- Outcome
- yielde0
- Direction
- increasese0
- Setting
- Newton soile0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“On the Newton soil calcitic lime produced significant yield increases”
t0“Corn”
Claim · model-written summary
Calcitic lime did not significantly affect potassium-induced magnesium deficiency symptoms on Newton soil.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- calcitic limee0
- Outcome
- K‐induced magnesium deficiency symptomse0
- Direction
- did not significantly affecte0
- Setting
- Newton soile0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“On the Newton soil calcitic lime produced significant yield increases, but did not significantly affect K‐induced magnesium deficiency symptoms nor percentage of magnesium in the leaves.”
t0“Corn”
Claim · model-written summary
Calcitic lime did not significantly affect leaf magnesium percentage on Newton soil.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- calcitic limee0
- Outcome
- percentage of magnesium in the leavese0
- Direction
- did not significantly affecte0
- Setting
- Newton soile0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“On the Newton soil calcitic lime produced significant yield increases, but did not significantly affect K‐induced magnesium deficiency symptoms nor percentage of magnesium in the leaves.”
t0“Corn”
Claim · model-written summary
Only a few Tracy-soil corn plants showed magnesium deficiencies.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- magnesium deficienciese0
- Setting
- Tracy soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“On the Tracy soil only a few plants showed magnesium deficiencies”
t0“Corn”
Claim · model-written summary
Potash did not significantly affect corn yield on Tracy soil.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- potashe0
- Outcome
- yieldse0
- Direction
- none of the potash, lime, or magnesium treatments significantly affected yieldse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“none of the potash, lime, or magnesium treatments significantly affected yields.”
t0“Corn”
Claim · model-written summary
Lime did not significantly affect corn yield on Tracy soil.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- limee0
- Outcome
- yieldse0
- Direction
- none of the potash, lime, or magnesium treatments significantly affected yieldse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“none of the potash, lime, or magnesium treatments significantly affected yields.”
t0“Corn”
Claim · model-written summary
Magnesium treatment did not significantly affect corn yield on Tracy soil.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- magnesium treatmentse0
- Outcome
- yieldse0
- Direction
- none of the potash, lime, or magnesium treatments significantly affected yieldse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“none of the potash, lime, or magnesium treatments significantly affected yields.”
t0“Corn”
Claim · model-written summary
Recommended calcitic lime and potash amounts are unlikely to cause yield-limiting magnesium deficiency on these soils.
- Taxon
- cornZea mays subsp. mayse0
- Outcome
- yield‐limiting magnesium deficiency symptomse0
- Qualifier
- not likelye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The evidence indicates that yield‐limiting magnesium deficiency symptoms with corn are not likely to result from the use of calcitic lime and potash in amounts presently recommended on these soils.”
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