Abstract
ABSTRACT INFORMATION is needed on crop response to com-binations of water-table depths and irrigation treat-ment to properly design irrigation and drainage systems. A 3-yr field experiment was conducted on a Hecla sandy loam soil with three water-table depths (treatments) shallow, medium, and deepand with four weekly sprinkler irrigation application amounts from 0 (precipi-tation only) to 1.5 times calculated irrigation require-ment. Production of corn (grain and total dry matter), sugarbeets (sucrose), and alfalfa, and applied-water-use efficiencies (AWUE) were highest from the shallow water-table treatment without irrigation. Plant yield responses from deeper water tables increased with ir-rigation amounts but never equalled those for the shal-low water table without irrigation. The probable reason for highest AWUE in the shallow water-table treat-ment is that crop roots obtained water from the slowly receding water table during the growing season. Deep percolation losses seemed to increase with irrigation amounts and were greatest for the shallow water table. These results challenge the agricultural industry to de-sign drainage and irrigation systems to fit the needs of the crop.
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Claims 5
Claim · model-written summary
Corn production and applied-water-use efficiency were highest under shallow water table without irrigation.
- Taxon
- corn
Zea mays subsp. mayse0 - Treatment
- shallow water-table treatment without irrigatione0
- Outcome
- grain and total dry mattere0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Production of corn (grain and total dry matter), sugarbeets (sucrose), and alfalfa, and applied-water-use efficiencies (AWUE) were highest from the shallow water-table treatment without irrigation.”
Claim · model-written summary
Sugarbeet sucrose production was highest under shallow water table without irrigation.
- Taxon
- sugarbeets
Beta vulgaris subsp. vulgarise0 - Treatment
- shallow water-table treatment without irrigatione0
- Outcome
- sucrosee0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Production of corn (grain and total dry matter), sugarbeets (sucrose), and alfalfa, and applied-water-use efficiencies (AWUE) were highest from the shallow water-table treatment without irrigation.”
Claim · model-written summary
Alfalfa production was highest under shallow water table without irrigation.
- Taxon
- alfalfa
Medicago sativae0 - Treatment
- shallow water-table treatment without irrigatione0
- Outcome
- Productione0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Production of corn (grain and total dry matter), sugarbeets (sucrose), and alfalfa, and applied-water-use efficiencies (AWUE) were highest from the shallow water-table treatment without irrigation.”
Claim · model-written summary
Crop yields from deeper water tables increased with irrigation but stayed below shallow-table yields without irrigation.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- ir-rigation amountse0
- Outcome
- Plant yield responsese0
- Direction
- increasede0
- Comparator
- shal-low water table without irrigatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant yield responses from deeper water tables increased with ir-rigation amounts but never equalled those for the shal-low water table without irrigation.”
e1“corn (grain and total dry matter), sugarbeets (sucrose), and alfalfa”
Claim · model-written summary
Deep percolation losses increased with irrigation and were greatest at shallow water table.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- irrigation amountse0
- Outcome
- Deep percolation lossese0
- Direction
- increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Deep percolation losses seemed to increase with irrigation amounts and were greatest for the shallow water table.”
e1“corn (grain and total dry matter), sugarbeets (sucrose), and alfalfa”
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See all 5 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.