Abstract
Published intervals for avoiding autotoxicity when reseeding alfalfa (Medicago sativa L.) after alfalfa range from 2 wk to more than 1 yr. Intervals between killing old alfalfa stands with herbicides and reseeding alfalfa were compared in field experiments established in 1992 (Locations 1 and 2) and 1993 (Location 3) near West Plains, MO. Soils were Poynor cherty silt loam (loamy-skeletal over clayey, siliceous, mesic Typic Paleudult), Ashton silt loam (fine-silty, mixed, mesic Mollic Hapludalf), and Waben very cherty silt loam (loamy-skeletal, siliceous, mesic Ultic Hapludalf), respectively. Main plots were 18-, 12-, 6-, 0.75-, and 0.5-mo rotation intervals before a common May planting date. Subplots were insecticide and fungicide treatments at planting. Insecticide or fungicide treatment did not affect plant density or yield during the establishment year or two subsequent years. Among years, plant densities for the 0.75- and 0.5-mo rotation intervals ranged between 12 and 19.2% lower (P < 0.05) than that of the 18-mo control interval, and yields for the 6- and 0.5-mo intervals ranged between 6.3 and 10.3% lower than that of the control (P < 0.05). Although plant density of the 0.75-mo rotation interval was lower, yield was similar to the 18-mo control due to incomplete kill of old plants. Plant density and dry matter yield remained ranked according to rotation interval from the seeding year through the third year, suggesting an autoconditioning effect during establishment that was retained at the population level. A rotation interval of at least 12 mo is suggested before reseeding alfalfa after alfalfa in the lower Midwest.
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Claims 9
Claim · model-written summary
Insecticide treatment did not affect alfalfa density or yield through two years after establishment.
- Taxon
- alfalfa
Medicago sativat0 - Treatment
- Insecticidee0
- Outcome
- plant density or yielde0
- Direction
- did not affecte0
- Qualifier
- during the establishment year or two subsequent yearse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Insecticide or fungicide treatment did not affect plant density or yield during the establishment year or two subsequent years”
t0“Establishment of Alfalfa after Alfalfa”
Claim · model-written summary
fungicide treatment did not affect alfalfa density or yield through two years after establishment.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- fungicidee0
- Outcome
- plant density or yielde0
- Direction
- did not affecte0
- Qualifier
- during the establishment year or two subsequent yearse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Insecticide or fungicide treatment did not affect plant density or yield during the establishment year or two subsequent years”
t0“Establishment of Alfalfa after Alfalfa”
Claim · model-written summary
The 0.75- rotation interval had alfalfa plant density 12 to 19.2% lower than the 18 month control.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- 0.75-e0
- Outcome
- plant densitiese0
- Direction
- lowere0
- Value
- 12 and 19.2%e0
- Comparator
- 18-mo control intervale0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plant densities for the 0.75- and 0.5-mo rotation intervals ranged between 12 and 19.2% lower (P < 0.05) than that of the 18-mo control interval”
t0“Establishment of Alfalfa after Alfalfa”
Claim · model-written summary
The 0.5-mo rotation interval had alfalfa plant density 12 to 19.2% lower than the 18 month control.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- 0.5-moe0
- Outcome
- plant densitiese0
- Direction
- lowere0
- Value
- 12 and 19.2%e0
- Comparator
- 18-mo control intervale0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plant densities for the 0.75- and 0.5-mo rotation intervals ranged between 12 and 19.2% lower (P < 0.05) than that of the 18-mo control interval”
t0“Establishment of Alfalfa after Alfalfa”
Claim · model-written summary
The 6- rotation interval had alfalfa yield 6.3 to 10.3% lower than the control.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- 6-e0
- Outcome
- yieldse0
- Direction
- lowere0
- Value
- 6.3 and 10.3%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yields for the 6- and 0.5-mo intervals ranged between 6.3 and 10.3% lower than that of the control (P < 0.05)”
t0“Establishment of Alfalfa after Alfalfa”
Claim · model-written summary
The 0.5-mo rotation interval had alfalfa yield 6.3 to 10.3% lower than the control.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- 0.5-moe0
- Outcome
- yieldse0
- Direction
- lowere0
- Value
- 6.3 and 10.3%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yields for the 6- and 0.5-mo intervals ranged between 6.3 and 10.3% lower than that of the control (P < 0.05)”
t0“Establishment of Alfalfa after Alfalfa”
Claim · model-written summary
Yield at the 0.75 month interval was similar to the 18 month control, attributed to incomplete kill of old plants.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- 0.75-mo rotation intervale0
- Outcome
- yielde0
- Direction
- similare0
- Qualifier
- incomplete kill of old plantse0
- Comparator
- 18-mo controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Although plant density of the 0.75-mo rotation interval was lower, yield was similar to the 18-mo control due to incomplete kill of old plants”
t0“Establishment of Alfalfa after Alfalfa”
Claim · model-written summary
Alfalfa plant density and dry matter yield retained their rotation interval ranking through the third year.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- rotation intervale0
- Outcome
- Plant density and dry matter yielde0
- Qualifier
- from the seeding year through the third yeare0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant density and dry matter yield remained ranked according to rotation interval from the seeding year through the third year”
t0“Establishment of Alfalfa after Alfalfa”
Claim · model-written summary
The authors suggest waiting at least 12 months before reseeding alfalfa after alfalfa in the lower Midwest.
- Taxon
- alfalfaMedicago sativae0
- Outcome
- rotation interval of at least 12 moe0
- Setting
- lower Midweste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A rotation interval of at least 12 mo is suggested before reseeding alfalfa after alfalfa in the lower Midwest”
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