Abstract
Invasion by grasses and weedy species occurs when plant density in alfalfa fields falls below critical levels. Several soil-borne fungal pathogens can reduce stand density in alfalfa by impeding seedling establishment and by killing older plants weakened by other stresses. Surveys of alfalfa fields were conducted in 1997, and pathogenic fungi from rotted roots were isolated and identified. Isolates of selected pathogens were applied with the seed in field trials to assess the impact of fertilizer and seeding system (conventional vs. sod-seeding, spring vs. dormant-fall seeding) on seedling emergence and subsequent productivity when disease pressure was high. The impact of various fungicide seed treatments was also assessed. Seed treatment improved seedling emergence and initial forage productivity in one of three trials; however, it had little effect on long-term forage yield. Addition of sulphur fertilizer had little effect on seedling emergence or survival, but improved forage productivity at all three trial sites. Sod-seeded plots suffered more winterkill and were less vigorous than plots seeded into a tilled seedbed. Seedling emergence was lower when seedlings were planted in the fall than in the spring. However, fall-seeded treatments showed a less adverse response to inoculum treatments and, in some cases, these seedlings were able to take advantage of early-season moisture to produce higher yields than their spring-seeded counterparts. Key words: Medicago, Fusarium, Pythium, Phoma, fungicide, seed treatment, fertilizer, tillage
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 9
Claim · model-written summary
Seed treatment improved emergence and initial productivity in one of three trials.
- Taxon
- alfalfa
Medicago sativat0 - Treatment
- Seed treatmente0
- Outcome
- seedling emergence and initial forage productivitye0
- Direction
- improvede0
- Qualifier
- one of three trialse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed treatment improved seedling emergence and initial forage productivity in one of three trials”
t0“alfalfa”
Claim · model-written summary
Seed treatment had little effect on long-term forage yield.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- Seed treatmente0
- Outcome
- long-term forage yielde0
- Direction
- little effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed treatment improved seedling emergence and initial forage productivity in one of three trials; however, it had little effect on long-term forage yield”
t0“alfalfa”
Claim · model-written summary
Sulphur fertilizer had little effect on seedling emergence or survival.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- sulphur fertilizere0
- Outcome
- seedling emergence or survivale0
- Direction
- little effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Addition of sulphur fertilizer had little effect on seedling emergence or survival”
t0“alfalfa”
Claim · model-written summary
Sulphur fertilizer improved productivity at all three sites.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- sulphur fertilizere0
- Outcome
- forage productivitye0
- Direction
- improvede0
- Qualifier
- all three trial sitese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Addition of sulphur fertilizer had little effect on seedling emergence or survival, but improved forage productivity at all three trial sites”
t0“alfalfa”
Claim · model-written summary
Sod-seeded plots suffered more winterkill than tilled-seedbed plots.
- Taxon
- alfalfaMedicago sativat0
- Material
- Sod-seeded plotse0
- Outcome
- winterkille0
- Direction
- moree0
- Comparator
- plots seeded into a tilled seedbede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sod-seeded plots suffered more winterkill and were less vigorous than plots seeded into a tilled seedbed”
t0“alfalfa”
Claim · model-written summary
Sod-seeded plots were less vigorous than tilled-seedbed plots.
- Taxon
- alfalfaMedicago sativat0
- Material
- Sod-seeded plotse0
- Outcome
- vigorouse0
- Direction
- lesse0
- Comparator
- plots seeded into a tilled seedbede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sod-seeded plots suffered more winterkill and were less vigorous than plots seeded into a tilled seedbed”
t0“alfalfa”
Claim · model-written summary
Fall planting had lower emergence than spring planting.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- in the falle0
- Outcome
- Seedling emergencee0
- Direction
- lowere0
- Comparator
- in the springe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seedling emergence was lower when seedlings were planted in the fall than in the spring”
t0“alfalfa”
Claim · model-written summary
Fall-seeded treatments had a less adverse response to inoculum.
- Taxon
- alfalfaMedicago sativat0
- Material
- fall-seeded treatmentse0
- Outcome
- response to inoculum treatmentse0
- Direction
- less adversee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fall-seeded treatments showed a less adverse response to inoculum treatments”
t0“alfalfa”
Claim · model-written summary
Some fall-seeded seedlings yielded more than spring-seeded seedlings using early moisture.
- Taxon
- alfalfaMedicago sativat0
- Outcome
- yieldse0
- Direction
- highere0
- Qualifier
- in some casese0
- Comparator
- spring-seeded counterpartse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in some cases, these seedlings were able to take advantage of early-season moisture to produce higher yields than their spring-seeded counterparts”
t0“alfalfa”
The same questions in other papers
sulfur atom · yield · Medicago sativa (alfalfa)Results differ
10 papers in the same direction as this paper · 5 in the opposite direction
- no effect
- no effect
- no effect
12 papers more in this group
See all 16 papers →sulfur atom · growth · Medicago sativa (alfalfa)Positive and negative results
2 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- no effect
1 paper more in this group
See all 5 papers →fertilization · growth · Medicago sativa (alfalfa)Results differ
17 papers in the same direction as this paper · 71 in the opposite direction
- positive
- positive
- positive
85 papers more in this group
See all 89 papers →seed treatment · yield · Medicago sativa (alfalfa)Positive and negative results
9 papers in the same direction as this paper · 5 in the opposite direction
- no effect
- no effect
- no effect
11 papers more in this group
See all 15 papers →fertilization · yield · Medicago sativa (alfalfa)Positive and negative results
150 papers in the same direction as this paper · 30 in the opposite direction · 3 reporting no difference from an alternative
- negative
- no effect
- no effect
180 papers more in this group
See all 184 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.