Abstract
Although the Southeast United States receives an average annual precipitation of 1300 mm, corn ( Zea mays L.) yield is often limited by erratic seasonal distributions. Irrigation studies were conducted from 2001 through 2008 on a Greenville fine sandy loam. Irrigation rates of 100, 66, 33%, and a non‐irrigated control were addressed with the 100% treatment following the recommendations of Irrigator Pro for Corn (model developed by USDA‐ARS). The objectives were to evaluate the effects of irrigation depth on grain yield, WUE, WUE i , and RWUE i of corn produced in the humid southeast region of the United States. The data were separated into 3 precipitation groups to address grain yield, water use efficiency (WUE), water use efficiency for irrigation (WUE i ), and net returns to WUE i (RWUE i ). Irrigation consistently increased grain yield regardless of precipitation amount. The highest grain yield resulted in the 100% treatment in the driest years. In the above average rainfall years, WUE responded inversely to irrigation amount. The highest WUE and WUE i occurred in the 100% irrigation amount during the below average rainfall years at 188.8 and 248.4 kg/ha/cm. The highest RWUE i occurred in the 100% rate in below average rainfall years at $17.62/ha/cm. Because of erratic rainfall distribution and crop stress, corn in the humid Southeast region should be produced with adequate irrigation.
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Claims 7
Claim · model-written summary
Irrigation increased corn grain yield regardless of precipitation amount.
- Taxon
- Corn
Zea mays subsp. mayst0 - Treatment
- Irrigatione0
- Outcome
- grain yielde0
- Direction
- increasede0
- Qualifier
- regardless of precipitation amounte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irrigation consistently increased grain yield regardless of precipitation amount.”
t0“Corn”
Claim · model-written summary
The 100% irrigation treatment gave the highest grain yield in the driest years.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- 100% treatmente0
- Outcome
- grain yielde0
- Direction
- higheste0
- Qualifier
- driest yearse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest grain yield resulted in the 100% treatment in the driest years.”
t0“Corn”
Claim · model-written summary
In above-average rainfall years, corn WUE decreased as irrigation increased.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- irrigation amounte0
- Outcome
- WUEe0
- Direction
- inverselye0
- Qualifier
- above average rainfall yearse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the above average rainfall years, WUE responded inversely to irrigation amount.”
t0“Corn”
Claim · model-written summary
In below-average rainfall years, the 100% irrigation rate gave the highest WUE at 188.8 kg/ha/cm.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- 100% irrigation amounte0
- Outcome
- WUEe0
- Direction
- higheste0
- Value
- 188.8 and 248.4 kg/ha/cme0
- Qualifier
- below average rainfall yearse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest WUE and WUE i occurred in the 100% irrigation amount during the below average rainfall years at 188.8 and 248.4 kg/ha/cm.”
t0“Corn”
Claim · model-written summary
In below-average rainfall years, the 100% irrigation rate gave the highest WUE i at 248.4 kg/ha/cm.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- 100% irrigation amounte0
- Outcome
- WUE ie0
- Direction
- higheste0
- Value
- 248.4 kg/ha/cme0
- Qualifier
- below average rainfall yearse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest WUE and WUE i occurred in the 100% irrigation amount during the below average rainfall years at 188.8 and 248.4 kg/ha/cm.”
t0“Corn”
Claim · model-written summary
In below-average rainfall years, the 100% irrigation rate gave the highest RWUE i at $17.62/ha/cm.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- 100% ratee0
- Outcome
- RWUE ie0
- Direction
- higheste0
- Value
- $17.62/ha/cme0
- Qualifier
- below average rainfall yearse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest RWUE i occurred in the 100% rate in below average rainfall years at $17.62/ha/cm.”
t0“Corn”
Claim · model-written summary
Corn in the humid Southeast region should receive adequate irrigation.
- Taxon
- cornZea mays subsp. mayse0
- Outcome
- produced with adequate irrigatione0
- Setting
- humid Southeast regione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“corn in the humid Southeast region should be produced with adequate irrigation.”
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See all 1,016 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.