Abstract
Fall dormancy (FD) group selection and irrigation management may be valuable tools for increasing alfalfa ( Medicago sativa L.) yield in semiarid, subtropical regions. Dry matter (DM) yields of moderately dormant, semidormant, moderately nondormant, and nondormant alfalfa as subplots (each represented by four varieties) were compared for four years under two irrigation regimes (furrow‐irrigated once before each harvest or 11 times throughout the year) as whole plots in the Southern High Plains of the USA. Variety, year, and harvest effects also were tested. There were four randomized complete blocks. Year‐round irrigation increased ( P < 0.05) first harvest yield in 10 of 16 comparisons by > 0.39 Mg/ha, affecting each FD grouping in at least 2 of 4 years. Warmer spring temperatures magnified the difference. Typical dormancy effects on yield were observed in late summer and autumn, but they were inverted in spring and early summer. Differences existed between FD groups in average annual production over the four years of the study (17.65, 18.66, 19.62, and 18.89 Mg/ha for moderately dormant, semidormant, moderately nondormant, and nondormant, respectively; 5% LSD = 0.95). Year‐round irrigation may have value during a warm winter when continued warm temperatures are forecast throughout spring.
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Claims 8
Claim · model-written summary
Year-round irrigation increased first-harvest alfalfa yield in 10 of 16 comparisons by more than 0.39 Mg/ha.
- Taxon
- alfalfa
Medicago sativae2 - Treatment
- Year‐round irrigatione0
- Outcome
- first harvest yielde0
- Direction
- increasede0
- Value
- > 0.39 Mg/hae0
- Qualifier
- 10 of 16 comparisonse0
- Comparator
- furrow‐irrigated once before each harveste1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Year‐round irrigation increased ( P < 0.05) first harvest yield in 10 of 16 comparisons by > 0.39 Mg/ha, affecting each FD grouping in at least 2 of 4 years.”
e1“furrow‐irrigated once before each harvest or 11 times throughout the year”
e2“alfalfa ( Medicago sativa L.)”
Claim · model-written summary
Warmer spring temperatures magnified the irrigation yield difference.
- Taxon
- alfalfaMedicago sativae2
- Treatment
- Warmer spring temperaturese0
- Outcome
- differencee0
- Direction
- magnifiede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Warmer spring temperatures magnified the difference.”
e1“Year‐round irrigation increased ( P < 0.05) first harvest yield”
e2“alfalfa ( Medicago sativa L.)”
Claim · model-written summary
Fall dormancy yield effects seen in late summer and autumn were inverted in spring and early summer.
- Taxon
- alfalfaMedicago sativae1
- Outcome
- dormancy effects on yielde0
- Qualifier
- inverted in spring and early summere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Typical dormancy effects on yield were observed in late summer and autumn, but they were inverted in spring and early summer.”
e1“alfalfa ( Medicago sativa L.)”
Claim · model-written summary
Moderately dormant alfalfa produced an annual average of 17.65 Mg/ha.
- Taxon
- alfalfaMedicago sativae1
- Material
- moderately dormante0
- Outcome
- average annual productione0
- Value
- 17.65e0
- Qualifier
- Mg/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Differences existed between FD groups in average annual production over the four years of the study (17.65, 18.66, 19.62, and 18.89 Mg/ha for moderately dormant, semidormant, moderately nondormant, and nondormant, respectively; 5% LSD = 0.95).”
e1“alfalfa ( Medicago sativa L.)”
Claim · model-written summary
Semidormant alfalfa produced an annual average of 18.66 Mg/ha.
- Taxon
- alfalfaMedicago sativae1
- Material
- semidormante0
- Outcome
- average annual productione0
- Value
- 18.66e0
- Qualifier
- Mg/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Differences existed between FD groups in average annual production over the four years of the study (17.65, 18.66, 19.62, and 18.89 Mg/ha for moderately dormant, semidormant, moderately nondormant, and nondormant, respectively; 5% LSD = 0.95).”
e1“alfalfa ( Medicago sativa L.)”
Claim · model-written summary
Moderately nondormant alfalfa produced an annual average of 19.62 Mg/ha.
- Taxon
- alfalfaMedicago sativae1
- Material
- moderately nondormante0
- Outcome
- average annual productione0
- Value
- 19.62e0
- Qualifier
- Mg/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Differences existed between FD groups in average annual production over the four years of the study (17.65, 18.66, 19.62, and 18.89 Mg/ha for moderately dormant, semidormant, moderately nondormant, and nondormant, respectively; 5% LSD = 0.95).”
e1“alfalfa ( Medicago sativa L.)”
Claim · model-written summary
Nondormant alfalfa produced an annual average of 18.89 Mg/ha.
- Taxon
- alfalfaMedicago sativae1
- Material
- nondormante0
- Outcome
- average annual productione0
- Value
- 18.89 Mg/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Differences existed between FD groups in average annual production over the four years of the study (17.65, 18.66, 19.62, and 18.89 Mg/ha for moderately dormant, semidormant, moderately nondormant, and nondormant, respectively; 5% LSD = 0.95).”
e1“alfalfa ( Medicago sativa L.)”
Claim · model-written summary
Year-round irrigation may be valuable during a warm winter if warm spring temperatures are forecast.
- Taxon
- alfalfaMedicago sativae1
- Outcome
- Year‐round irrigation may have valuee0
- Qualifier
- during a warm winter when continued warm temperatures are forecast throughout springe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Year‐round irrigation may have value during a warm winter when continued warm temperatures are forecast throughout spring.”
e1“alfalfa ( Medicago sativa L.)”
The same questions in other papers
irrigation · yield · Medicago sativa (alfalfa)Results differ
65 papers in the same direction as this paper · 25 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- positive
- negative
88 papers more in this group
See all 92 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.