Abstract
Abstract Although manganese (Mn) deficiency in soybeans (Glycine max) has been recognized on the Atlantic Coastal Plain, it has not been well recognized in corn (Zea mays) until recent years. Hence, there is a lack of information relating to the diagnosis and correction of Mn deficiency in corn. Field experiments were conducted to determine if the Mn soil test interpretation for soybeans would work for corn. The leaf Mn critical level also was evaluated, as were soil and foliar application methods of correcting a deficiency. Corn yield response to Mn fertilization was best explained by both soil pH and Mehlich‐3 extractable Mn concentration. The influence of these two soil properties for predicting yield response was similar for corn and soybeans, but it appears that the soil Mn critical level is lower for corn than for soybeans. The critical Mn concentration in the ear leaf at early silking was found to be 11 mg kg‐1. Manganese banded with diammonium phosphate (DAP) was three times as effective as Mn broadcast with DAP in increasing the leaf Mn concentration of corn. Banding DAP also tends to increase the availability of native soil Mn. A foliar Mn rate of 0.6 kg ha‐1 applied once partially corrected a Mn deficiency, but multiple applications were required for optimum yield.
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Claims 8
Claim · model-written summary
Corn yield response to Mn fertilization was best explained by soil pH and Mehlich‐3 extractable Mn concentration.
- Taxon
- corn
Zea mays subsp. mayst0 - Treatment
- Mn fertilizatione1
- Compound
- Mehlich‐3 extractable Mn concentratione1
- Outcome
- yield responsee1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Diagnosis and correction of manganese deficiency in corn”
e1“Corn yield response to Mn fertilization was best explained by both soil pH and Mehlich‐3 extractable Mn concentration”
Claim · model-written summary
The soil Mn critical level is lower for corn than for soybeans.
- Taxon
- cornZea mays subsp. mayst0
- Outcome
- soil Mn critical levele2
- Direction
- lowere2
- Comparator
- soybeanse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Diagnosis and correction of manganese deficiency in corn”
e2“it appears that the soil Mn critical level is lower for corn than for soybeans”
Claim · model-written summary
Soil pH and Mehlich‐3 extractable Mn predicted corn and soybean yield response similarly.
- Taxon
- cornZea mays subsp. mayst0
- Outcome
- predicting yield responsee3
- Direction
- no_changeinferrede3
- Comparator
- soybeanse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Diagnosis and correction of manganese deficiency in corn”
e3“The influence of these two soil properties for predicting yield response was similar for corn and soybeans”
Claim · model-written summary
The critical Mn concentration in the ear leaf at early silking was 11 mg kg‐1.
- Taxon
- cornZea mays subsp. mayst0
- Organ / stage
- ear leaf at early silkinge4
- Outcome
- critical Mn concentratione4
- Value
- 11 mg kg‐1e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Diagnosis and correction of manganese deficiency in corn”
e4“The critical Mn concentration in the ear leaf at early silking was found to be 11 mg kg‐1”
Claim · model-written summary
Mn banded with DAP was three times as effective as Mn broadcast with DAP in increasing leaf Mn concentration of corn.
- Taxon
- cornZea mays subsp. mayst0
- Organ / stage
- leafe5
- Treatment
- Manganese banded with diammonium phosphate (DAP)e5
- Outcome
- leaf Mn concentratione5
- Direction
- increasinge5
- Value
- three timese5
- Comparator
- Mn broadcast with DAPe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Diagnosis and correction of manganese deficiency in corn”
e5“Manganese banded with diammonium phosphate (DAP) was three times as effective as Mn broadcast with DAP in increasing the leaf Mn concentration of corn”
Claim · model-written summary
Banding DAP tended to increase the availability of native soil Mn.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- Banding DAPe6
- Outcome
- availability of native soil Mne6
- Direction
- increasee6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Diagnosis and correction of manganese deficiency in corn”
e6“Banding DAP also tends to increase the availability of native soil Mn”
Claim · model-written summary
A foliar Mn rate of 0.6 kg ha‐1 applied once partially corrected a Mn deficiency.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- foliar Mn rate of 0.6 kg ha‐1e7
- Outcome
- Mn deficiencye7
- Direction
- partially correctede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Diagnosis and correction of manganese deficiency in corn”
e7“A foliar Mn rate of 0.6 kg ha‐1 applied once partially corrected a Mn deficiency”
Claim · model-written summary
Multiple Mn applications were required for optimum corn yield.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- multiple applicationse7
- Outcome
- optimum yielde7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Diagnosis and correction of manganese deficiency in corn”
e7“multiple applications were required for optimum yield”
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See all 161 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.