Abstract
Reliable tissue leaf standards for N, P, and K are available for corn, although standards for some other nutrients have not been well defined. Published ear leaf Mg sufficiency ranges are generally about 0.20 to 0.40% of dry leaf weight, critical values range from 0.15% to 0.25%, and the current standard most widely used with DRIS is 0.24%. However, in maximum yield studies, yields over 18 t/ha have been obtained with ear leaf Mg levels ranging from 0.13 to 0.18%. A field study was initiated to determine whether providing additional Mg to plants grown under ‘maximum yield’ conditions would result in increased tissue Mg and yield, or whether optimum or sufficient Mg levels should be redefined. Ear leaf Mg was increased by foliar‐applied Mg in two years of the study, and by soil‐applied Mg in the third. Maximum yields were obtained at ear leaf concentrations of 0.16, 0.14, and 0.19% in the 3 years of the study. The overall optimum Mg concentration was determined to be about 0.15%.
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Claims 6
Claim · model-written summary
Foliar applied magnesium increased ear leaf magnesium in two years.
- Taxon
- corn
Zea mays subsp. mayst0 - Treatment
- foliar‐applied Mge0
- Outcome
- Ear leaf Mge0
- Direction
- increasede0
- Qualifier
- two years of the studye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ear leaf Mg was increased by foliar‐applied Mg in two years of the study”
t0“corn”
Claim · model-written summary
Soil applied magnesium increased ear leaf magnesium in the third year.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- soil‐applied Mge0
- Outcome
- Ear leaf Mge0
- Direction
- increasede0
- Qualifier
- the thirde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ear leaf Mg was increased by foliar‐applied Mg in two years of the study, and by soil‐applied Mg in the third”
t0“corn”
Claim · model-written summary
Maximum corn yield occurred at 0.16% ear leaf magnesium in one study year.
- Taxon
- cornZea mays subsp. mayst0
- Organ / stage
- ear leafe0
- Outcome
- Maximum yieldse0
- Value
- 0.16e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximum yields were obtained at ear leaf concentrations of 0.16, 0.14, and 0.19% in the 3 years of the study”
t0“corn”
Claim · model-written summary
Maximum corn yield occurred at 0.14% ear leaf magnesium in one study year.
- Taxon
- cornZea mays subsp. mayst0
- Organ / stage
- ear leafe0
- Outcome
- Maximum yieldse0
- Value
- 0.14e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximum yields were obtained at ear leaf concentrations of 0.16, 0.14, and 0.19% in the 3 years of the study”
t0“corn”
Claim · model-written summary
Maximum corn yield occurred at 0.19% ear leaf magnesium in one study year.
- Taxon
- cornZea mays subsp. mayst0
- Organ / stage
- ear leafe0
- Outcome
- Maximum yieldse0
- Value
- 0.19%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximum yields were obtained at ear leaf concentrations of 0.16, 0.14, and 0.19% in the 3 years of the study”
t0“corn”
Claim · model-written summary
The overall optimum ear leaf magnesium concentration was about 0.15%.
- Taxon
- cornZea mays subsp. mayst0
- Outcome
- overall optimum Mg concentratione0
- Value
- about 0.15%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The overall optimum Mg concentration was determined to be about 0.15%”
t0“corn”
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