Abstract
Mature seeds of wild oat (Avena fatua L.) from Alberta were completely dormant when freshly harvested. About 46% of the seeds lost their dormancy during storage for 33 wk at room temperature. Gibberellic acid was very effective in overcoming dormancy in freshly harvested or stored seeds. Water extracts from dormant wild oat seeds were more inhibitory than water extracts from non-dormant seeds to germination of wild oat seeds. A number of chemicals, viz., nitrates of potassium, ammonium and sodium, cytokinins (benzyladenine, kinetin), and thiourea, were effective to varying degrees in stimulating the germination and emergence of seeds. Percent germination and emergence of seedlings was maximum at temperatures ranging from 10 to 21 C, although germination and emergence were slower at 10 C than at the higher temperatures. A temperature of 32 C was detrimental to normal germination and emergence. Maximum seedling emergence occurred when soil moisture was maintained at 50 or 75% of the field capacity. At field capacity moisture levels, no seedlings emerged and nearly all the seeds had rotted within 11 days of planting. Planting depths of 2–8 cm were best for seedling emergence. From greater planting depths the rate and percent emergence were greater for larger seeds than for smaller or medium-sized seeds (separated on the basis of kernel weight). Time to maximum emergence was 8, 11–13 and 13–17 days from depths of 0.5–3 cm, 4–12 cm and 16–20 cm, respectively. Practical implications of some of these findings in a wild oat control program are discussed.
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 12
Claim · model-written summary
Freshly harvested wild oat seeds from Alberta were completely dormant.
Verbatim
e0“Mature seeds of wild oat (Avena fatua L.) from Alberta were completely dormant when freshly harvested”
Claim · model-written summary
About 46% of seeds lost dormancy during 33 weeks of storage at room temperature.
AvenaOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“About 46% of the seeds lost their dormancy during storage for 33 wk at room temperature”
t0“WILD OATS”
Claim · model-written summary
Gibberellic acid was very effective in overcoming dormancy of freshly harvested or stored seeds.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gibberellic acid was very effective in overcoming dormancy in freshly harvested or stored seeds”
t0“WILD OATS”
Claim · model-written summary
Water extracts from dormant seeds inhibited wild oat germination more than extracts from non-dormant seeds.
Verbatim
e0“Water extracts from dormant wild oat seeds were more inhibitory than water extracts from non-dormant seeds to germination of wild oat seeds”
Claim · model-written summary
Nitrates, cytokinins and thiourea stimulated germination and emergence to varying degrees.
- Treatment
- nitrates of potassium, ammonium and sodium, cytokinins (benzyladenine, kinetin), and thioureae0
- Outcome
- germination and emergencee0
- Direction
- stimulatinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nitrates of potassium, ammonium and sodium, cytokinins (benzyladenine, kinetin), and thiourea, were effective to varying degrees in stimulating the germination and emergence of seeds”
t0“WILD OATS”
Claim · model-written summary
Germination and emergence were maximum at 10 to 21 C, slower at 10 C.
- Treatment
- temperatures ranging from 10 to 21 Ce0
- Outcome
- Percent germination and emergence of seedlingse0
- Direction
- maximume0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Percent germination and emergence of seedlings was maximum at temperatures ranging from 10 to 21 C”
t0“WILD OATS”
Claim · model-written summary
A temperature of 32 C was detrimental to normal germination and emergence.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A temperature of 32 C was detrimental to normal germination and emergence”
t0“WILD OATS”
Claim · model-written summary
Maximum seedling emergence occurred at soil moisture of 50 or 75% of field capacity.
- Treatment
- soil moisture was maintained at 50 or 75% of the field capacitye0
- Outcome
- seedling emergencee0
- Direction
- Maximume0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximum seedling emergence occurred when soil moisture was maintained at 50 or 75% of the field capacity”
t0“WILD OATS”
Claim · model-written summary
At field capacity moisture no seedlings emerged and nearly all seeds rotted within 11 days.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At field capacity moisture levels, no seedlings emerged and nearly all the seeds had rotted within 11 days of planting”
t0“WILD OATS”
Claim · model-written summary
Planting depths of 2-8 cm were best for seedling emergence.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Planting depths of 2–8 cm were best for seedling emergence”
t0“WILD OATS”
Claim · model-written summary
From greater planting depths, larger seeds had greater rate and percent emergence than smaller or medium-sized seeds.
- Material
- larger seedse0
- Treatment
- greater planting depthse0
- Outcome
- rate and percent emergencee0
- Direction
- greatere0
- Comparator
- smaller or medium-sized seedse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“From greater planting depths the rate and percent emergence were greater for larger seeds than for smaller or medium-sized seeds”
t0“WILD OATS”
Claim · model-written summary
Time to maximum emergence was 8, 11-13 and 13-17 days from depths of 0.5-3, 4-12 and 16-20 cm.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Time to maximum emergence was 8, 11–13 and 13–17 days from depths of 0.5–3 cm, 4–12 cm and 16–20 cm, respectively”
t0“WILD OATS”
The same questions in other papers
kinetin · growth · AvenaPositive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- positive
Gibberellic acid · growth · AvenaResults agree
6 papers in the same direction as this paper
- positive
- positive
- positive
3 papers more in this group
See all 7 papers →nitrogen · growth · AvenaPositive and negative results
3 in the opposite direction
- negative
- negative
- negative
class · growth · AvenaPositive and negative results
5 papers in the same direction as this paper · 5 in the opposite direction
- negative
- no effect
- negative
7 papers more in this group
See all 11 papers →botanical · growth · Avena sativa (oats)Positive and negative results
14 papers in the same direction as this paper · 7 in the opposite direction
- negative
- negative
- negative
18 papers more in this group
See all 22 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.