Abstract
Abstract After decades of heavy regulation, growers across the United States were able to begin growing industrial hemp ( Cannabis sativa L.) again in 2014. The 2014 and 2018 Farm Bills made it legal for research and production to resume and removed hemp from the list of controlled substances. Because of the long prohibition of hemp production, many questions surrounding best management practices still exist. In 2019 and 2020, studies were conducted in Arlington and Chippewa Falls, Wisconsin to evaluate the effects of cultivar, seeding rate, and nitrogen rate on hemp yield. Two cultivars (X‐59 and CRS‐1), seeded at three seeding rates (22, 34, and 45 kg ha −1 ) and three nitrogen rates (0, 67, and 134 kg ha −1 ), were evaluated. At Arlington, nitrogen did not impact fiber yield; however, an interaction among cultivar, seeding rate, and nitrogen rate effected grain yield. At Chippewa Falls, fiber yield increased by 20% when nitrogen rate increased from 0 to 67 or 134 kg N. Similarly, grain yield increased by 52% when the nitrogen rate increased from 0 to 67 or 134 kg ha N. The effect of seeding rate alone was highly variable with no consistent pattern on response variables measured. Therefore, the overall effect of nitrogen rate was more consistent than the effect of seeding rate on response variables measured. Ultimately, management recommendations will be dependent on local conditions; however, hemp does respond to the addition of nitrogen fertilizer.
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Claims 7
Claim · model-written summary
At Arlington, nitrogen did not affect fiber yield.
- Taxon
- Cannabis sativa L.
Cannabis sativat0 - Treatment
- nitrogene0
- Outcome
- fiber yielde0
- Direction
- did not impacte0
- Setting
- Arlingtone0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At Arlington, nitrogen did not impact fiber yield”
t0“industrial hemp ( Cannabis sativa L.)”
Claim · model-written summary
At Arlington, cultivar, seeding rate and nitrogen rate interacted in grain yield.
- Taxon
- Cannabis sativa L.Cannabis sativat0
- Treatment
- nitrogen ratee0
- Outcome
- grain yielde0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an interaction among cultivar, seeding rate, and nitrogen rate effected grain yield.”
t0“industrial hemp ( Cannabis sativa L.)”
Claim · model-written summary
At Chippewa Falls, nitrogen raised fiber yield by 20%.
- Taxon
- Cannabis sativa L.Cannabis sativat0
- Treatment
- nitrogen rate increased from 0 to 67 or 134 kg Ne0
- Outcome
- fiber yielde0
- Direction
- increasede0
- Value
- 20%e0
- Comparator
- 0e0
- Setting
- Chippewa Fallse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At Chippewa Falls, fiber yield increased by 20% when nitrogen rate increased from 0 to 67 or 134 kg N.”
t0“industrial hemp ( Cannabis sativa L.)”
Claim · model-written summary
At Chippewa Falls, nitrogen raised grain yield by 52%.
- Taxon
- Cannabis sativa L.Cannabis sativat0
- Treatment
- nitrogen rate increased from 0 to 67 or 134 kg ha Ne0
- Outcome
- grain yielde0
- Direction
- increasede0
- Value
- 52%e0
- Comparator
- 0e0
- Setting
- Chippewa Fallse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“grain yield increased by 52% when the nitrogen rate increased from 0 to 67 or 134 kg ha N.”
e1“At Chippewa Falls, fiber yield increased by 20% when nitrogen rate increased from 0 to 67 or 134 kg N.”
t0“industrial hemp ( Cannabis sativa L.)”
Claim · model-written summary
Seeding rate had no consistent response pattern.
- Taxon
- Cannabis sativa L.Cannabis sativat0
- Treatment
- seeding ratee0
- Outcome
- response variables measurede0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of seeding rate alone was highly variable with no consistent pattern on response variables measured.”
t0“industrial hemp ( Cannabis sativa L.)”
Claim · model-written summary
Nitrogen effects were more consistent than seeding rate effects.
- Taxon
- Cannabis sativa L.Cannabis sativat0
- Treatment
- nitrogen ratee0
- Outcome
- response variables measurede0
- Direction
- more consistente0
- Comparator
- seeding ratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the overall effect of nitrogen rate was more consistent than the effect of seeding rate on response variables measured.”
t0“industrial hemp ( Cannabis sativa L.)”
Claim · model-written summary
Management recommendations depend on local conditions.
- Taxon
- Cannabis sativa L.Cannabis sativat0
- Outcome
- management recommendationse0
- Qualifier
- local conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“management recommendations will be dependent on local conditions”
t0“industrial hemp ( Cannabis sativa L.)”
The same questions in other papers
nitrogen · quality: grain · Cannabis sativaPositive and negative results
3 papers in the same direction as this paper · 2 in the opposite direction · 1 reporting no difference from an alternative
- positive
- negative
- no effect
3 papers more in this group
See all 7 papers →nitrogen · yield · Cannabis sativaPositive and negative results
14 papers in the same direction as this paper · 1 in the opposite direction
- positive
- positive
- positive
12 papers more in this group
See all 16 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.