Abstract
Abstract Silvicultural practices to reduce managerial inputs, increase yields, and decrease rotation age for eastern black walnut contribute substantially toward making this species more attractive as a forestry investment. Height and diameter measurements of black walnut interplanted with European black alder or autumn olive were taken at ages 14 and 18 in fifth-acre plots at a location in southern Illinois. Black walnut had been planted by USDA Forest Service scientists at a 12 x 32-ft spacing. For the interplanted plots, three black alder or autumn olive were planted within the rows between the walnut trees at a spacing of 8 ft. Based on projections of average dbh, the autumn olive and walnut mixture possessed the highest estimated black walnut yields and return on investment. Average dbh values of 11 in. were projected for the interplanted walnut at age 31. In the black alder interplanting it was estimated that similar rates of growth would require 40 years. Estimated dbh for the control plantings did not reach merchantable sawlog size within the 80-year projection period. Interplanting black walnut with nitrogen-fixing tree species also is well adapted for marginal farmland and may provide landowners with returns that match or exceed those from other more intensively managed alternatives. North. J. Appl. For. 6:129-132, September 1989.
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 5
Claim · model-written summary
Autumn olive and walnut had the highest projected black walnut yield and investment return.
Verbatim
e0“the autumn olive and walnut mixture possessed the highest estimated black walnut yields and return on investment”
Claim · model-written summary
Interplanted walnut was projected to average 11 inches dbh at age 31.
Verbatim
e0“Average dbh values of 11 in. were projected for the interplanted walnut at age 31”
Claim · model-written summary
Black alder interplanting was projected to require 40 years to achieve comparable walnut growth.
- Taxon
- black alder
.jpg?width=60)
Alnus glutinosae0 - Treatment
- black alder interplantinge0
- Outcome
- similar rates of growthe0
- Value
- 40 yearse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“In the black alder interplanting it was estimated that similar rates of growth would require 40 years”
Claim · model-written summary
Control walnuts were projected to remain below merchantable sawlog size over 80 years.
Not reportedTaxon
Verbatim
e0“Estimated dbh for the control plantings did not reach merchantable sawlog size within the 80-year projection period”
Claim · model-written summary
Interplanting walnut with nitrogen-fixing trees may suit marginal farmland and provide competitive returns.
- Taxon
- black walnut
Juglans nigrae0 - Outcome
- well adapted for marginal farmlande0
- Qualifier
- may provide landowners with returns that match or exceed those from other more intensively managed alternativese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Interplanting black walnut with nitrogen-fixing tree species also is well adapted for marginal farmland and may provide landowners with returns that match or exceed those from other more intensively managed alternatives”