Abstract
Abstract Legume seedlings from seed of different sizes compete with one another in pure seedings, usually to the detriment of smaller seedlings. We seeded variable rates of sized‐seed at Bozeman, Mont., to determine if less competition would permit lowering the seeding rate of alfalfa. We screened alfalfa ( Medicago sativa L.) seed to small, medium, and large sizes weighing 160, 210, and 256 mg/100 seed respectively, and also made up a composite of the three sizes. We planted seed of each size at seeding rates of 1.1, 2.2, 4.5, and 9.0 kg/ha into a Bozeman silt loam (Agric‐Pachic Cryoboroll) soil in the field and measured seedling emergence and survival and yield in the year following seeding. Number of seedlings that emerged and number of plants that survived the second year were closely related to seeding rate. Percentage of planted seeds, resulting in mature plants from two separate plantings, decreased with increased seeding rate due to more intraplant competition. More seedlings emerged from small seed, or from the seed composite of all sized‐seeds, than from medium or large seeds. Seed size did not affect yield in the year of seeding or the year following. A seeding rate as low as 1.1 kg/ha at one location and 2.2 kg/ha at a second location gave maximum yield in the year following seeding. Our data showed no advantage of sizing seed. Seedling density was as good or better with small or composited seed as with large seed at the same seeding rate.
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Claims 10
Claim · model-written summary
Seedling emergence and second-year survival were closely related to seeding rate.
- Taxon
- alfalfa
Medicago sativat0 - Treatment
- seeding ratee0
- Outcome
- Number of seedlings that emerged and number of plants that survived the second yeare0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Number of seedlings that emerged and number of plants that survived the second year were closely related to seeding rate.”
t0“Alfalfa”
Claim · model-written summary
The percentage of planted seeds becoming mature plants decreased with higher seeding rate.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- increased seeding ratee0
- Outcome
- Percentage of planted seeds, resulting in mature plantse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Percentage of planted seeds, resulting in mature plants from two separate plantings, decreased with increased seeding rate due to more intraplant competition.”
t0“Alfalfa”
Claim · model-written summary
More seedlings emerged from small seeds than medium or large seeds.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- small seede0
- Outcome
- seedlings emergede0
- Direction
- Moree0
- Comparator
- medium or large seedse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“More seedlings emerged from small seed, or from the seed composite of all sized‐seeds, than from medium or large seeds.”
t0“Alfalfa”
Claim · model-written summary
More seedlings emerged from composite seeds than medium or large seeds.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- seed composite of all sized‐seedse0
- Outcome
- seedlings emergede0
- Direction
- Moree0
- Comparator
- medium or large seedse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“More seedlings emerged from small seed, or from the seed composite of all sized‐seeds, than from medium or large seeds.”
t0“Alfalfa”
Claim · model-written summary
Seed size did not affect yield in the seeding year or following year.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- Seed sizee0
- Outcome
- yield in the year of seeding or the year followinge0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed size did not affect yield in the year of seeding or the year following.”
t0“Alfalfa”
Claim · model-written summary
At one location 1.1 kg/ha produced maximum following-year yield.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- 1.1 kg/hae0
- Outcome
- yield in the year following seedinge0
- Direction
- maximume0
- Setting
- one locatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A seeding rate as low as 1.1 kg/ha at one location and 2.2 kg/ha at a second location gave maximum yield in the year following seeding.”
t0“Alfalfa”
Claim · model-written summary
At a second location 2.2 kg/ha produced maximum following-year yield.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- 2.2 kg/hae0
- Outcome
- yield in the year following seedinge0
- Direction
- maximume0
- Setting
- a second locatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A seeding rate as low as 1.1 kg/ha at one location and 2.2 kg/ha at a second location gave maximum yield in the year following seeding.”
t0“Alfalfa”
Claim · model-written summary
Sizing seed offered no advantage.
- Taxon
- alfalfaMedicago sativat0
- Outcome
- no advantage of sizing seede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Our data showed no advantage of sizing seed.”
t0“Alfalfa”
Claim · model-written summary
Small seed produced seedling density as good as or better than large seed at the same rate.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- smalle0
- Outcome
- Seedling densitye0
- Direction
- as good or bettere0
- Comparator
- large seede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seedling density was as good or better with small or composited seed as with large seed at the same seeding rate.”
t0“Alfalfa”
Claim · model-written summary
Composite seed produced seedling density as good as or better than large seed at the same rate.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- composited seede0
- Outcome
- Seedling densitye0
- Direction
- as good or bettere0
- Comparator
- large seede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seedling density was as good or better with small or composited seed as with large seed at the same seeding rate.”
t0“Alfalfa”
The same questions in other papers
property · yield · Medicago sativa (alfalfa)Positive and negative results
1 in the opposite direction
- 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.