Abstract
Abstract Responses of sweet corn plants ( Zea mays L. var. rugosa cv. Jubilee) to levels of residual P and K in a fine sandy loam soil from previous broadcast applications of concentrated superphosphate (CSP) and potassium chloride (KCI) and to band-applied monoammonium phosphate (MAP), potassium sulfate (K 2 SO 4 ), and magnesium sulfate (MgSO 4 ) at planting were studied. Fourteen years after no applications of broadcast CSP or KCI fertilizers, responses of sweet corn plants to levels of residual P were greater than to residual K in the soil. Increasing the level of residual P in the soil increased dry weight per seedling from 1.5 to 7.7 g, fresh weight per ear from 278 to 358 g, the concentration of P from 2.9 to 4.6 mg·g −1 dry weight, but decreased K, Ca, and Zn in the leaves. Increasing the level of residual K in the soil did not affect the dry weight of the seedlings or the fresh weight of the ears, but increased the concentration of K from 16.7 to 28.1 mg·g −1 dry weight and decreased Ca and Mg in the leaves. Banded MAP, especially at low levels of residual P in the soil, increased the dry weight of the seedlings and the fresh weight of the ears. Banded K 2 SO 4 did not affect the weight of the seedlings or ears, but increased the concentration of K and decreased Ca and, especially, Mg in the leaves. Banded MgSO 4 , with or without high residual K in the soil and/or banded K 2 SO 4 , did not affect weight of the seedlings or ears, but decreased the concentration of K and increased Mg in the leaves of the sweet corn plants.
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Claims 15
Claim · model-written summary
Sweet corn responses to residual P in the soil were greater than to residual K.
Verbatim
e1“Fourteen years after no applications of broadcast CSP or KCI fertilizers, responses of sweet corn plants to levels of residual P were greater than to residual K in the soil”
Claim · model-written summary
Increasing residual P in the soil increased dry weight per seedling from 1.5 to 7.7 g.
- Taxon
- sweet corne1
- Treatment
- level of residual P in the soile2
- Outcome
- dry weight per seedlinge2
- Direction
- increasede2
- Value
- from 1.5 to 7.7 ge2
Not reportedComparator
Verbatim
e1“Fourteen years after no applications of broadcast CSP or KCI fertilizers, responses of sweet corn plants to levels of residual P were greater than to residual K in the soil”
e2“Increasing the level of residual P in the soil increased dry weight per seedling from 1.5 to 7.7 g, fresh weight per ear from 278 to 358 g, the concentration of P from 2.9 to 4.6 mg·g −1 dry weight, but decreased K, Ca, and Zn in the leaves”
Claim · model-written summary
Increasing residual P in the soil increased fresh weight per ear from 278 to 358 g.
- Taxon
- sweet corne1
- Treatment
- level of residual P in the soile2
- Outcome
- fresh weight per eare2
- Direction
- increasede2
- Value
- from 278 to 358 ge2
Not reportedComparator
Verbatim
e1“Fourteen years after no applications of broadcast CSP or KCI fertilizers, responses of sweet corn plants to levels of residual P were greater than to residual K in the soil”
e2“Increasing the level of residual P in the soil increased dry weight per seedling from 1.5 to 7.7 g, fresh weight per ear from 278 to 358 g, the concentration of P from 2.9 to 4.6 mg·g −1 dry weight, but decreased K, Ca, and Zn in the leaves”
Claim · model-written summary
Increasing residual P in the soil increased leaf P concentration from 2.9 to 4.6 mg·g −1 dry weight.
- Taxon
- sweet corne1
- Treatment
- level of residual P in the soile2
- Outcome
- concentration of Pe2
- Direction
- increasede2
- Value
- from 2.9 to 4.6 mg·g −1 dry weighte2
Not reportedComparator
Verbatim
e1“Fourteen years after no applications of broadcast CSP or KCI fertilizers, responses of sweet corn plants to levels of residual P were greater than to residual K in the soil”
e2“Increasing the level of residual P in the soil increased dry weight per seedling from 1.5 to 7.7 g, fresh weight per ear from 278 to 358 g, the concentration of P from 2.9 to 4.6 mg·g −1 dry weight, but decreased K, Ca, and Zn in the leaves”
Claim · model-written summary
Increasing residual P in the soil decreased K, Ca and Zn in sweet corn leaves.
- Taxon
- sweet corne1
- Organ / stage
- leavese2
- Treatment
- level of residual P in the soile2
- Outcome
- K, Ca, and Zn in the leavese2
- Direction
- decreasede2
Not reportedComparator
Verbatim
e1“Fourteen years after no applications of broadcast CSP or KCI fertilizers, responses of sweet corn plants to levels of residual P were greater than to residual K in the soil”
e2“Increasing the level of residual P in the soil increased dry weight per seedling from 1.5 to 7.7 g, fresh weight per ear from 278 to 358 g, the concentration of P from 2.9 to 4.6 mg·g −1 dry weight, but decreased K, Ca, and Zn in the leaves”
Claim · model-written summary
Increasing residual K in the soil did not affect sweet corn seedling dry weight or ear fresh weight.
- Taxon
- sweet corne1
- Treatment
- level of residual K in the soile3
- Outcome
- dry weight of the seedlings or the fresh weight of the earse3
- Direction
- did not affecte3
Not reportedComparator
Verbatim
e1“Fourteen years after no applications of broadcast CSP or KCI fertilizers, responses of sweet corn plants to levels of residual P were greater than to residual K in the soil”
e3“Increasing the level of residual K in the soil did not affect the dry weight of the seedlings or the fresh weight of the ears, but increased the concentration of K from 16.7 to 28.1 mg·g −1 dry weight and decreased Ca and Mg in the leaves”
Claim · model-written summary
Increasing residual K in the soil increased leaf K concentration from 16.7 to 28.1 mg·g −1 dry weight.
- Taxon
- sweet corne1
- Treatment
- level of residual K in the soile3
- Outcome
- concentration of Ke3
- Direction
- increasede3
- Value
- from 16.7 to 28.1 mg·g −1 dry weighte3
Not reportedComparator
Verbatim
e1“Fourteen years after no applications of broadcast CSP or KCI fertilizers, responses of sweet corn plants to levels of residual P were greater than to residual K in the soil”
e3“Increasing the level of residual K in the soil did not affect the dry weight of the seedlings or the fresh weight of the ears, but increased the concentration of K from 16.7 to 28.1 mg·g −1 dry weight and decreased Ca and Mg in the leaves”
Claim · model-written summary
Increasing residual K in the soil decreased Ca and Mg in sweet corn leaves.
- Taxon
- sweet corne1
- Treatment
- level of residual K in the soile3
- Outcome
- Ca and Mg in the leavese3
- Direction
- decreasede3
Not reportedComparator
Verbatim
e1“Fourteen years after no applications of broadcast CSP or KCI fertilizers, responses of sweet corn plants to levels of residual P were greater than to residual K in the soil”
e3“Increasing the level of residual K in the soil did not affect the dry weight of the seedlings or the fresh weight of the ears, but increased the concentration of K from 16.7 to 28.1 mg·g −1 dry weight and decreased Ca and Mg in the leaves”
Claim · model-written summary
Banded MAP increased seedling dry weight and ear fresh weight, especially at low residual P levels.
- Taxon
- sweet corne1
- Treatment
- Banded MAPe4
- Outcome
- dry weight of the seedlings and the fresh weight of the earse4
- Direction
- increasede4
- Qualifier
- especially at low levels of residual P in the soile4
Not reportedComparator
Verbatim
e1“Fourteen years after no applications of broadcast CSP or KCI fertilizers, responses of sweet corn plants to levels of residual P were greater than to residual K in the soil”
e4“Banded MAP, especially at low levels of residual P in the soil, increased the dry weight of the seedlings and the fresh weight of the ears”
Claim · model-written summary
Banded K2SO4 did not affect sweet corn seedling or ear weight.
- Taxon
- sweet corne1
- Treatment
- Banded K 2 SO 4e5
- Outcome
- weight of the seedlings or earse5
- Direction
- did not affecte5
Not reportedComparator
Verbatim
e1“Fourteen years after no applications of broadcast CSP or KCI fertilizers, responses of sweet corn plants to levels of residual P were greater than to residual K in the soil”
e5“Banded K 2 SO 4 did not affect the weight of the seedlings or ears, but increased the concentration of K and decreased Ca and, especially, Mg in the leaves”
Claim · model-written summary
Banded K2SO4 increased the K concentration in sweet corn leaves.
- Taxon
- sweet corne1
- Organ / stage
- leavese5
- Treatment
- Banded K 2 SO 4e5
- Outcome
- concentration of Ke5
- Direction
- increasede5
Not reportedComparator
Verbatim
e1“Fourteen years after no applications of broadcast CSP or KCI fertilizers, responses of sweet corn plants to levels of residual P were greater than to residual K in the soil”
e5“Banded K 2 SO 4 did not affect the weight of the seedlings or ears, but increased the concentration of K and decreased Ca and, especially, Mg in the leaves”
Claim · model-written summary
Banded K2SO4 decreased Ca and, especially, Mg in sweet corn leaves.
Not reportedComparator
Verbatim
e1“Fourteen years after no applications of broadcast CSP or KCI fertilizers, responses of sweet corn plants to levels of residual P were greater than to residual K in the soil”
e5“Banded K 2 SO 4 did not affect the weight of the seedlings or ears, but increased the concentration of K and decreased Ca and, especially, Mg in the leaves”
Claim · model-written summary
Banded MgSO4 did not affect sweet corn seedling or ear weight.
- Taxon
- sweet corne1
- Treatment
- Banded MgSO 4e6
- Outcome
- weight of the seedlings or earse6
- Direction
- did not affecte6
Not reportedComparator
Verbatim
e1“Fourteen years after no applications of broadcast CSP or KCI fertilizers, responses of sweet corn plants to levels of residual P were greater than to residual K in the soil”
e6“Banded MgSO 4 , with or without high residual K in the soil and/or banded K 2 SO 4 , did not affect weight of the seedlings or ears, but decreased the concentration of K and increased Mg in the leaves of the sweet corn plants”
Claim · model-written summary
Banded MgSO4 decreased the K concentration in sweet corn leaves.
Not reportedComparator
Verbatim
e1“Fourteen years after no applications of broadcast CSP or KCI fertilizers, responses of sweet corn plants to levels of residual P were greater than to residual K in the soil”
e6“Banded MgSO 4 , with or without high residual K in the soil and/or banded K 2 SO 4 , did not affect weight of the seedlings or ears, but decreased the concentration of K and increased Mg in the leaves of the sweet corn plants”
Claim · model-written summary
Banded MgSO4 increased Mg in sweet corn leaves.
Not reportedComparator
Verbatim
e1“Fourteen years after no applications of broadcast CSP or KCI fertilizers, responses of sweet corn plants to levels of residual P were greater than to residual K in the soil”
e6“Banded MgSO 4 , with or without high residual K in the soil and/or banded K 2 SO 4 , did not affect weight of the seedlings or ears, but decreased the concentration of K and increased Mg in the leaves of the sweet corn plants”
The same questions in other papers
ammonium dihydrogen phosphate · growth · Zea mays (maize)Positive and negative results
4 papers in the same direction as this paper · 1 reporting no difference from an alternative
- no effect
- positive
- positive
2 papers more in this group
See all 6 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.