Abstract
Field experiments were conducted on a Black Chernozem silty loam soil at Melfort, Saskatchewan, Canada, from 2000 to 2002, to determine the effect of seeding rate and row spacing on weed competition, as well as on seed, shoot biomass production and seed q uality attributes of industrial hemp ( Cannabis sativa L. ‘Fasamo’ and ‘Finola’). Increasing seeding rate from 20 to 60 or 80 kg ha -1 decreased weed density in all years (average of 33%) and reduced weed size (34%) in 2000. It also increased hemp plant density, biomass and seed yield (average of 174, 23 and 34%, respectively). Seed weight and protein were not affected by seeding rates, but seed oil content increased 1% in one year, when seeding rate increased from 20 to 60 kg ha -1 . Row spacing (18 and 36 cm) had little or no definite effect on most of the parameters studied. Key words: Biomass, cultivar, hemp, protein content, oil content, organic farming, row spacing, seeding rate, weed competition
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Claims 8
Claim · model-written summary
Increasing seeding rate from 20 kg ha-1 decreased weed density (average 33%) in all years.
- Taxon
- hemp
Cannabis sativa subsp. sativat0 - Treatment
- Increasing seeding rate from 20 to 60 or 80 kg ha -1e1
- Interactor
- weede1weed
- Outcome
- weed densitye1
- Direction
- decreasede1
- Value
- 33%e1
- Qualifier
- in all yearse1
- Comparator
- from 20e1
- Setting
- Melfort, Saskatchewane3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“hemp”
e1“Increasing seeding rate from 20 to 60 or 80 kg ha -1 decreased weed density in all years (average of 33%) and reduced weed size (34%) in 2000”
e3“Melfort, Saskatchewan”
Claim · model-written summary
Increasing seeding rate from 20 kg ha-1 reduced weed size (34%) in 2000.
- Taxon
- hempCannabis sativa subsp. sativat0
- Treatment
- Increasing seeding rate from 20 to 60 or 80 kg ha -1e1
- Interactor
- weede1weed
- Outcome
- weed sizee1
- Direction
- reducede1
- Value
- 34%e1
- Qualifier
- in 2000e1
- Comparator
- from 20e1
- Setting
- Melfort, Saskatchewane3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“hemp”
e1“Increasing seeding rate from 20 to 60 or 80 kg ha -1 decreased weed density in all years (average of 33%) and reduced weed size (34%) in 2000”
e3“Melfort, Saskatchewan”
Claim · model-written summary
Increasing seeding rate from 20 kg ha-1 increased hemp plant density (174).
- Taxon
- hempCannabis sativa subsp. sativat0
- Treatment
- Increasing seeding rate from 20 to 60 or 80 kg ha -1e2
- Outcome
- plant densitye4
- Direction
- increasede4
- Value
- 174e4
- Comparator
- from 20e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“hemp”
e2“Increasing seeding rate from 20 to 60 or 80 kg ha -1”
e4“It also increased hemp plant density, biomass and seed yield (average of 174, 23 and 34%, respectively)”
Claim · model-written summary
Increasing seeding rate from 20 kg ha-1 increased hemp biomass (23%).
- Taxon
- hempCannabis sativa subsp. sativat0
- Treatment
- Increasing seeding rate from 20 to 60 or 80 kg ha -1e2
- Outcome
- biomasse4
- Direction
- increasede4
- Value
- 23e4
- Comparator
- from 20e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“hemp”
e2“Increasing seeding rate from 20 to 60 or 80 kg ha -1”
e4“It also increased hemp plant density, biomass and seed yield (average of 174, 23 and 34%, respectively)”
Claim · model-written summary
Increasing seeding rate from 20 kg ha-1 increased hemp seed yield (34%).
- Taxon
- hempCannabis sativa subsp. sativat0
- Treatment
- Increasing seeding rate from 20 to 60 or 80 kg ha -1e2
- Outcome
- seed yielde4
- Direction
- increasede4
- Value
- 34%e4
- Comparator
- from 20e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“hemp”
e2“Increasing seeding rate from 20 to 60 or 80 kg ha -1”
e4“It also increased hemp plant density, biomass and seed yield (average of 174, 23 and 34%, respectively)”
Claim · model-written summary
Seed weight and protein of hemp were not affected by seeding rate.
- Taxon
- hempCannabis sativa subsp. sativat0
- Treatment
- seeding ratese5
- Outcome
- Seed weight and proteine5
- Direction
- not affectede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“hemp”
e5“Seed weight and protein were not affected by seeding rates”
Claim · model-written summary
Seed oil content of hemp increased by 1% in one year when seeding rate increased from 20 kg ha-1.
- Taxon
- hempCannabis sativa subsp. sativat0
- Treatment
- seeding rate increased from 20 to 60 kg ha -1e6
- Outcome
- seed oil contente6
- Direction
- increasede6
- Value
- 1%e6
- Qualifier
- in one yeare6
- Comparator
- from 20e6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“hemp”
e6“but seed oil content increased 1% in one year, when seeding rate increased from 20 to 60 kg ha -1”
Claim · model-written summary
Row spacing of 18 and 36 cm had little or no definite effect on most parameters of hemp.
- Taxon
- hempCannabis sativa subsp. sativat0
- Treatment
- Row spacinge7
- Outcome
- most of the parameters studiede7
- Direction
- little or no definite effecte7
- Setting
- Melfort, Saskatchewane3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“hemp”
e7“Row spacing (18 and 36 cm) had little or no definite effect on most of the parameters studied”
e3“Melfort, Saskatchewan”
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See all 9 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.