Abstract
Little is known about the economic feasibility of irrigating cool‐ and warm‐season grass species for hay production in the southeastern United States. The objective of this study was to determine the breakeven cost of irrigating bermudagrass [ Cynodon dactylon (L.) Pers.], tall fescue [ Schedonorus arundinaceus (Schreb.) Dumort., formerly Festuca arundinacea Schreb.], and orchardgrass ( Dactylis glomerata L.) for hay production in Tennessee. Yield response to three irrigation levels during three harvest periods was estimated for the three grass species using data obtained from a 5‐yr study in a mixed model analysis. Partial budgets were developed to calculate annual net returns for irrigated and unirrigated hay production and to calculate the annual breakeven cost of irrigation for each grass. Orchardgrass and tall fescue hay yields negatively responded to irrigation during the spring harvest but positively responded for the summer and fall harvests. Similarly, bermudagrass hay yield positively responded to irrigation during the summer and fall harvests. For all three grass species, hay yield was greatest at the highest irrigation level (3.05 cm wk −1 ) during the fall harvest only. The breakeven costs of irrigation for hay production ranged between US$59 and US$87 ha −1 for orchardgrass, between US$66 and US$136 ha −1 for tall fescue, and between US$222 and US$335 ha −1 for bermudagrass. Results suggest that a producer would be more likely to increase net returns by irrigating bermudagrass than irrigating cool‐season grass species in the southeastern United States.
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Claims 10
Claim · model-written summary
Orchardgrass spring hay yield decreased with irrigation.
- Taxon
- Orchardgrass
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Dactylis glomeratae0 - Organ / stage
- spring harveste0
- Treatment
- irrigatione0
- Outcome
- hay yieldse0
- Direction
- negativelye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Orchardgrass and tall fescue hay yields negatively responded to irrigation during the spring harvest but positively responded for the summer and fall harvests.”
Claim · model-written summary
Tall fescue spring hay yield decreased with irrigation.
- Taxon
- tall fescue
Lolium arundinaceume0 - Organ / stage
- spring harveste0
- Treatment
- irrigatione0
- Outcome
- hay yieldse0
- Direction
- negativelye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Orchardgrass and tall fescue hay yields negatively responded to irrigation during the spring harvest but positively responded for the summer and fall harvests.”
Claim · model-written summary
Orchardgrass summer and fall hay yield increased with irrigation.
- Taxon
- OrchardgrassDactylis glomeratae0
- Treatment
- irrigatione0
- Outcome
- hay yieldse0
- Direction
- positivelye0
- Qualifier
- summer and fall harvestse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Orchardgrass and tall fescue hay yields negatively responded to irrigation during the spring harvest but positively responded for the summer and fall harvests.”
Claim · model-written summary
Tall fescue summer and fall hay yield increased with irrigation.
- Taxon
- tall fescueLolium arundinaceume0
- Treatment
- irrigatione0
- Outcome
- hay yieldse0
- Direction
- positivelye0
- Qualifier
- summer and fall harvestse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Orchardgrass and tall fescue hay yields negatively responded to irrigation during the spring harvest but positively responded for the summer and fall harvests.”
Claim · model-written summary
Bermudagrass summer and fall yield increased with irrigation.
- Taxon
- bermudagrass
Cynodon dactylone0 - Treatment
- irrigatione0
- Outcome
- hay yielde0
- Direction
- positivelye0
- Qualifier
- summer and fall harvestse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“bermudagrass hay yield positively responded to irrigation during the summer and fall harvests.”
Claim · model-written summary
All three grasses had greatest fall yield at the highest irrigation rate.
- Taxon
- all three grass speciese0
- Treatment
- highest irrigation level (3.05 cm wk −1 )e0
- Outcome
- hay yielde0
- Direction
- greateste0
- Qualifier
- fall harvest onlye0
Not reportedComparator
Verbatim
e0“For all three grass species, hay yield was greatest at the highest irrigation level (3.05 cm wk −1 ) during the fall harvest only.”
Claim · model-written summary
Orchardgrass irrigation breakeven costs ranged from US$59 to US$87 per hectare.
- Taxon
- orchardgrassDactylis glomeratae0
- Outcome
- breakeven costs of irrigation for hay productione0
- Value
- US$59 and US$87 ha −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“breakeven costs of irrigation for hay production ranged between US$59 and US$87 ha −1 for orchardgrass”
Claim · model-written summary
Tall fescue irrigation breakeven costs ranged from US$66 to US$136 per hectare.
- Taxon
- tall fescueLolium arundinaceume0
- Outcome
- breakeven costs of irrigation for hay productione1
- Value
- US$66 and US$136 ha −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“between US$66 and US$136 ha −1 for tall fescue”
e1“breakeven costs of irrigation for hay production”
Claim · model-written summary
Bermudagrass irrigation breakeven costs ranged from US$222 to US$335 per hectare.
- Taxon
- bermudagrassCynodon dactylone0
- Outcome
- breakeven costs of irrigation for hay productione1
- Value
- US$222 and US$335 ha −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“between US$222 and US$335 ha −1 for bermudagrass”
e1“breakeven costs of irrigation for hay production”
Claim · model-written summary
The authors conclude bermudagrass irrigation is more likely to increase net returns than cool-season grass irrigation.
- Taxon
- bermudagrassCynodon dactylone0
- Outcome
- increase net returns by irrigating bermudagrasse0
- Comparator
- cool‐season grass speciese0
- Setting
- southeastern United Statese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a producer would be more likely to increase net returns by irrigating bermudagrass than irrigating cool‐season grass species in the southeastern United States.”
The same questions in other papers
irrigation · yield · Dactylis glomerata (cocksfoot)Positive and negative results
2 in the opposite direction
- negative
- negative
irrigation · yield · Lolium arundinaceum (tall fescue)Positive and negative results
4 papers in the same direction as this paper · 2 in the opposite direction
- negative
- negative
- positive
3 papers more in this group
See all 7 papers →irrigation · yield · Cynodon dactylon (Bermuda grass)Results agree
1 paper in the same direction as this paper
- 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.