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by dbhguru
Thu Jul 09, 2020 7:13 am
Forum: Special Lists
Topic: Rucker Comparisons
Replies: 69
Views: 3052

Re: Rucker Comparisons

Brian, The birch at Smith College is a black birch. In terms of its white cousins, John Eichholz broke 100 feet on a white birch in Mohawk Trail State Forest years ago. I can ask him what his numbers are. Interestingly, of yellow, black, and white. black is the clear height winner in New England, an...
by dbhguru
Wed Jul 08, 2020 10:47 am
Forum: Special Lists
Topic: Rucker Comparisons
Replies: 69
Views: 3052

Re: Rucker Comparisons

Brian,

Jared Lockwood and I measured a quaking aspen to 108.0 feet on a private property in Stockbridge, MA. It was in 2017. Best I issn do now.

Bob
by dbhguru
Sun Jul 05, 2020 8:11 am
Forum: Measurement and Dendromorphometry
Topic: LTI TruPoint 300
Replies: 13
Views: 2092

Re: LTI TruPoint 300

Ents, Steve Colburn recently informed Cadre members that LTI has secondhand TruPoint 300 units available for $875/unit. New ones now cost $1,300. The used price is truly a good value if you can make use of the versatility of the instrument. But what might that mean for tree-measurers? The 300 is adv...
by dbhguru
Thu Jul 02, 2020 6:00 pm
Forum: Special Lists
Topic: Rucker Comparisons
Replies: 69
Views: 3052

Re: Rucker Comparisons

Brian, Great job! BTW, not that it matters, but John Eichholz and I share the credit for the bigtooth aspen in MTSF. It was my original discovery and was once 126.5 feet tall. Subsequently, its crown began to die back. Wh en John got to it, it was down to 126, and continued dropping from there. Bob
by dbhguru
Tue Jun 23, 2020 5:55 pm
Forum: Measurement and Dendromorphometry
Topic: LTI TruPoint 300
Replies: 13
Views: 2092

Re: LTI TruPoint 300

Ents,

The testing of the TruPoint 300 Diameter function continues. My 300, which I affectionately have named YODA is performing extremely well.
The attachment tells the story.

Bob
by dbhguru
Fri Jun 19, 2020 6:54 am
Forum: Measurement and Dendromorphometry
Topic: LTI TruPoint 300
Replies: 13
Views: 2092

Re: LTI TruPoint 300

ENTS, Of late, I've resumed testing the TruPoint 300 as I promised LTI I would do. The attachment shows the TruPoint's accuracy for trunk diameter measurements as of 10 trials. As the number of trials expands, I don't expect the average difference between caliper and TruPoint measurements to stay so...
by dbhguru
Thu Jun 18, 2020 7:57 am
Forum: Measurement and Dendromorphometry
Topic: New mission?
Replies: 4
Views: 358

Re: New mission?

Erik, Thanks for a most thoughtful and insightful response. I'm am glad that you see a continuing role fro NTS in areas where we can practice our trade. We function in an arena filled with heavyweights, but whose collective work reflect highly conflicting results. When one digs into the scholarly pa...
by dbhguru
Sun Jun 14, 2020 8:55 am
Forum: Measurement and Dendromorphometry
Topic: New mission?
Replies: 4
Views: 358

Re: New mission?

Ents, Well, I haven't exactly been swamped with comments about a carbon mission. Perhaps it is too much of a stretch for NTS, and again maybe not. I would like to hear the thoughts of others on what you think is important to pursue now and into the future. Thanks in advance to anyone willing to shar...
by dbhguru
Thu Jun 11, 2020 12:37 pm
Forum: Special Lists
Topic: Rucker Comparisons
Replies: 69
Views: 3052

Re: Rucker Comparisons

Brian,

The 150-foot Norway Spruce grows in Buckland State Forest in the Berkshires of Massachusetts. In the past, it was measured by John Eichholz and later by Jared Lockwood. It needs to be re-measured, but you can carry it as 150 feet for now. It would represent Massachusetts' only entry.

Bob
by dbhguru
Sat Jun 06, 2020 12:28 pm
Forum: Measurement and Dendromorphometry
Topic: i-Tree Carbon Calculator
Replies: 1
Views: 198

Re: i-Tree Carbon Calculator

Ents,

Attached is an Excel workbook for the modeling of a neighbor's white pine with comparisons to i-Tree in this first worksheet.

Bob

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