Abstract
Zinc deficiency symptoms are frequently observed at the 4 to 6 leaf stage of corn ( Zea mays L.) grown on limed soils of the Northeast. A 7‐yr field experiment was conducted near Ithaca, NY to determine the corn yield response to fertilizer Zn. The soil was a moderately eroded, Mardin silt loam (coarse‐loamy, mixed mesic Typic Fragiochrepts), moderately low in organic matter, moderately high in P and K, very low in Zn, and limed to pH near 7. Severe Zn deficiency symptoms had been observed on corn in previous years. Response to Zn also was studied in the greenhouse at three root‐zone temperatures. Corn responded to fertilizer Zn in 6 out of the 7 yrs of the study. The response from one initial broadcast application of 8 lb/Zn acre was equal to 8 to 10 lb Zn/acre applied annually. Response to 4 lb Zn/acre applied in the fertilizer band at planting was statistically significant only after several annual applications were mixed with the soil by annual spring plowing and disking. Extractable soil Zn with diethylenetriamine pentaacetic acid (DTPA) (Lindsay and Norvell, 1978) and sodium acetate (NaOAc) (Greweling and Peech, 1965) were highly correlated, but the DTPA solution extracted three times more Zn. Less than 10% of applied Zn was accounted for by subsequent soil extraction with DTPA. In the greenhouse study, corn Zn content increased with temperature and with soil Zn additions. Response to band‐placed Zn was greater at a lower temperature where root growth was reduced. Zinc deficiency in young corn plants can be expected when the DTPA‐extractable Zn is 0.6 ppm or less, or the Zn concentration of the young corn tissue is 16 ppm or less. The Zn deficiency symptoms and the associated yield reduction can be prevented for at least 5 yr with a single broadcast incorporation of 8 lb Zn/acre.
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Claims 12
Claim · model-written summary
Corn responded to fertilizer Zn in 6 of the 7 years of the field study.
- Taxon
- Corn
Zea mays subsp. mayst0 - Treatment
- fertilizer Zne1
- Outcome
- respondede1
- Value
- 6 out of the 7 yrse1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Corn responded to fertilizer Zn in 6 out of the 7 yrs of the study”
t0“Response of Corn to Zinc Fertilization”
Claim · model-written summary
One initial broadcast of 8 lb Zn/acre gave a response equal to 8 to 10 lb Zn/acre applied annually.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- one initial broadcast application of 8 lb/Zn acree2
- Outcome
- responsee2
- Direction
- equal toe2
- Comparator
- 8 to 10 lb Zn/acre applied annuallye2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“The response from one initial broadcast application of 8 lb/Zn acre was equal to 8 to 10 lb Zn/acre applied annually”
t0“Response of Corn to Zinc Fertilization”
Claim · model-written summary
Response to 4 lb Zn/acre in the fertilizer band at planting was statistically significant only after several annual applications were mixed with the soil.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- 4 lb Zn/acre applied in the fertilizer band at plantinge3
- Outcome
- Responsee3
- Qualifier
- only after several annual applications were mixed with the soile3
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Response to 4 lb Zn/acre applied in the fertilizer band at planting was statistically significant only after several annual applications were mixed with the soil by annual spring plowing and disking”
t0“Response of Corn to Zinc Fertilization”
Claim · model-written summary
Extractable soil Zn with DTPA and with sodium acetate (NaOAc) was highly correlated in the corn soil.
- Taxon
- CornZea mays subsp. mayst0
- Compound
- DTPAe4
- Outcome
- Extractable soil Zne4
- Direction
- highly correlatede4
- Comparator
- sodium acetate (NaOAc)e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Extractable soil Zn with diethylenetriamine pentaacetic acid (DTPA) (Lindsay and Norvell, 1978) and sodium acetate (NaOAc) (Greweling and Peech, 1965) were highly correlated, but the DTPA solution extracted three times more Zn”
t0“Response of Corn to Zinc Fertilization”
Claim · model-written summary
The DTPA solution extracted three times more Zn than sodium acetate (NaOAc) from the soil.
- Taxon
- CornZea mays subsp. mayst0
- Compound
- DTPAe4
- Outcome
- extractede4
- Value
- three times moree4
- Comparator
- sodium acetate (NaOAc)e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Extractable soil Zn with diethylenetriamine pentaacetic acid (DTPA) (Lindsay and Norvell, 1978) and sodium acetate (NaOAc) (Greweling and Peech, 1965) were highly correlated, but the DTPA solution extracted three times more Zn”
t0“Response of Corn to Zinc Fertilization”
Claim · model-written summary
Less than 10% of applied Zn was accounted for by subsequent soil extraction with DTPA.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- applied Zn was accounted for by subsequent soil extractione5
- Value
- Less than 10%e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Less than 10% of applied Zn was accounted for by subsequent soil extraction with DTPA”
t0“Response of Corn to Zinc Fertilization”
Claim · model-written summary
In the greenhouse, corn Zn content increased with root-zone temperature.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- temperaturee6
- Outcome
- corn Zn contente6
- Direction
- increasede6
- Setting
- greenhouse studye6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“In the greenhouse study, corn Zn content increased with temperature and with soil Zn additions”
t0“Response of Corn to Zinc Fertilization”
Claim · model-written summary
In the greenhouse, corn Zn content increased with soil Zn additions.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- soil Zn additionse6
- Outcome
- corn Zn contente6
- Direction
- increasede6
- Setting
- greenhouse studye6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“In the greenhouse study, corn Zn content increased with temperature and with soil Zn additions”
t0“Response of Corn to Zinc Fertilization”
Claim · model-written summary
Response to band-placed Zn was greater at a lower temperature, where root growth was reduced.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- lower temperaturee7
- Outcome
- Responsee7
- Direction
- greatere7
- Qualifier
- where root growth was reducede7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“Response to band‐placed Zn was greater at a lower temperature where root growth was reduced”
t0“Response of Corn to Zinc Fertilization”
Claim · model-written summary
Zinc deficiency in young corn plants can be expected when DTPA-extractable Zn is 0.6 ppm or less.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- Zinc deficiency in young corn plantse2
- Value
- 0.6 ppm or lesse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Zinc deficiency in young corn plants can be expected when the DTPA‐extractable Zn is 0.6 ppm or less, or the Zn concentration of the young corn tissue is 16 ppm or less”
t0“Response of Corn to Zinc Fertilization”
Claim · model-written summary
Zinc deficiency in young corn plants can be expected when the Zn concentration of young corn tissue is 16 ppm or less.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- Zinc deficiency in young corn plantse2
- Value
- 16 ppm or lesse2
- Qualifier
- Zn concentration of the young corn tissuee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Zinc deficiency in young corn plants can be expected when the DTPA‐extractable Zn is 0.6 ppm or less, or the Zn concentration of the young corn tissue is 16 ppm or less”
t0“Response of Corn to Zinc Fertilization”
Claim · model-written summary
A single broadcast incorporation of 8 lb Zn/acre can prevent Zn deficiency symptoms and the associated yield reduction for at least 5 years.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- single broadcast incorporation of 8 lb Zn/acree1
- Outcome
- Zn deficiency symptoms and the associated yield reductione1
- Direction
- can be preventede1
- Value
- at least 5 yre1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The Zn deficiency symptoms and the associated yield reduction can be prevented for at least 5 yr with a single broadcast incorporation of 8 lb Zn/acre”
t0“Response of Corn to Zinc Fertilization”
The same questions in other papers
zinc atom · disease · Zea mays (maize)Positive and negative results
4 papers in the same direction as this paper · 11 in the opposite direction
This paper is about lacking the nutrient, so it counts the other way round here.
- positive
- positive
- positive
12 papers more in this group
See all 16 papers →transplanting · disease · Zea mays (maize)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- positive
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.