Abstract
Abstract Hybrid poplar (Populus spp.) is the newest tree crop in the Pacific Northwest. We have been studying its management and growth in the Willamette Valley of western Oregon on poorly drained soils with no irrigation. We found very good growth rates—up to 4000 ft3/ac in 6 yr—on soils considered poor for many kinds of agriculture. For plantation establishment, we found that after 1 yr, simple no-till methods were as effective as the often-used ripping and tilling approaches. An herbicide screening study resulted in good poplar growth with some herbicides and reduced growth with two others commonly used in site preparation. Our investigation of root development indicates that the good growth on these poorly drained, nonirrigated soils is associated with poplar's deep and extensive root development. West. J. Appl. For. 18(4):281–285.
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Claims 5
Claim · model-written summary
Hybrid poplar grew up to 4000 ft3/ac in six years on poor soils.
PopulusOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Hybrid poplar (Populus spp.) is the newest tree crop in the Pacific Northwest.”
e1“very good growth rates—up to 4000 ft3/ac in 6 yr—on soils considered poor for many kinds of agriculture”
Claim · model-written summary
After one year, no till establishment was as effective as ripping and tilling.
- Treatment
- simple no-till methodse1
- Outcome
- as effectivee1
- Direction
- as effectivee1
- Qualifier
- after 1 yre1
- Comparator
- ripping and tilling approachese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Hybrid poplar (Populus spp.)”
e1“after 1 yr, simple no-till methods were as effective as the often-used ripping and tilling approaches”
Claim · model-written summary
Some herbicides permitted good poplar growth.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“good poplar growth with some herbicides”
Claim · model-written summary
Two commonly used site preparation herbicides reduced poplar growth.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reduced growth with two others commonly used in site preparation”
e1“good poplar growth with some herbicides”
Claim · model-written summary
Good growth on poorly drained unirrigated soils was associated with deep extensive roots.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“good growth on these poorly drained, nonirrigated soils is associated with poplar's deep and extensive root development”
The same questions in other papers
climate site · growth · Populus (poplar)Positive and negative results
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See all 5 papers →herbicide · growth · Populus (poplar)Positive and negative results
5 papers in the same direction as this paper · 2 in the opposite direction
- negative
- no effect
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See all 8 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.