Field Methods in Dendrochronology. Field Methods in Dendrochronology: So, if you’ve selected your...
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Transcript of Field Methods in Dendrochronology. Field Methods in Dendrochronology: So, if you’ve selected your...
![Page 1: Field Methods in Dendrochronology. Field Methods in Dendrochronology: So, if you’ve selected your site and you can even see your trees. NOW WHAT?So, if.](https://reader036.fdocuments.net/reader036/viewer/2022062309/5697c02b1a28abf838cd8681/html5/thumbnails/1.jpg)
Field Methods in DendrochronologyField Methods in Dendrochronology
![Page 2: Field Methods in Dendrochronology. Field Methods in Dendrochronology: So, if you’ve selected your site and you can even see your trees. NOW WHAT?So, if.](https://reader036.fdocuments.net/reader036/viewer/2022062309/5697c02b1a28abf838cd8681/html5/thumbnails/2.jpg)
Field Methods in Dendrochronology:Field Methods in Dendrochronology:
• So, if you’ve selected your site and So, if you’ve selected your site and you can even see your trees. NOW you can even see your trees. NOW WHAT?WHAT?
• Two primary means of collecting Two primary means of collecting wood samples:wood samples:
• Increment borerIncrement borer
• Chain sawChain saw
• Forget the chain saw for this class Forget the chain saw for this class ……
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The Increment BorerThe Increment Borer
Pressler, M.R. 1866. Der forstliche Zuwachsbohrer neuester Construction. Tharandter forstliches Jahrbuch 17: 155-223.
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The Increment Borer (broken apart)The Increment Borer (broken apart)
Grissino-Mayer, H.D. 2003. A manual and tutorial for the proper use of an increment borer. Tree-Ring Research 59(2): 63-79.
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The Increment Borer (assembled)The Increment Borer (assembled)
Grissino-Mayer, H.D. 2003. A manual and tutorial for the proper use of an increment borer. Tree-Ring Research 59(2): 63-79.
![Page 6: Field Methods in Dendrochronology. Field Methods in Dendrochronology: So, if you’ve selected your site and you can even see your trees. NOW WHAT?So, if.](https://reader036.fdocuments.net/reader036/viewer/2022062309/5697c02b1a28abf838cd8681/html5/thumbnails/6.jpg)
Preparing the Increment BorerPreparing the Increment Borer
• Fasten auger onto the handle via the clip.
• Spray inside and outside of auger with WD-40.
• Place the extractor some place convenient (NOT on the ground).
• Place the tip of the auger against the tree.
• Breast height or ground level?
• Are you coring on a slope? WHY does this matter?
• Look for a furrow in the bark. Bark is GOOD.
• Grasp the handle with one hand and the auger with the other.
• Push and turn simultaneously.
• Keep the shaft steady. Why is this important?
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Starting an Increment Borer (I)Starting an Increment Borer (I)
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Starting an Increment Borer (II)Starting an Increment Borer (II)
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Coring the TreeCoring the Tree
• Turn with both hands, even pressure on each handle.
• Listen for “odd” sounds. If it sounds strange, stop immediately.
• You do not want to “jam” the wood inside
• This occurs when the inner portion of the core stops.
• As you continue to turn, though, new wood is pushed against the jammed wood.
• This creates an awful mess inside your borer, and sometimes renders your borer useless for the rest of the trip.
• Jammed borers often must be cleared in a wood shop.
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Coring the TreeCoring the Tree
• Every few turns, check to see if the wood is jamming inside:
1. Insert the extractor until it hits the core. Mark this location with your thumb.
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Coring the TreeCoring the Tree
• Every few turns, check to see if the wood is jamming inside:
2. Pull the extractor out. Place the tip against the bark. Its distance should be the same as when it was inside the auger.
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Coring the TreeCoring the Tree
• Every few turns, check to see if the wood is jamming inside:
3. If your thumb is away from the handle, your wood is jamming! Stop immediately.
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Extracting the CoreExtracting the Core
• Insert the extractor under the core.
• Gently push the extractor the full length of the auger.
• The teeth on the extractor will bite into the end of the core.
• Turn one or two full turns out.
• Pull the extractor gently to break the core from the tree.
• Cradle the core as it exits the auger in case pieces fall off.
• Insert the core immediately into a paper or plastic straw.
• Label the straw with the proper ID.
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Extracting the CoreExtracting the Core
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Extracting the CoreExtracting the Core
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Wrapping up …Wrapping up …
• Write down tree and site information on standard Write down tree and site information on standard field forms, including:field forms, including:
• Height estimate, dbh, crown condition, aspect, Height estimate, dbh, crown condition, aspect, slope, topography, vegetation, location (relative slope, topography, vegetation, location (relative and GPS).and GPS).
• Photo documentation: helps in crossdating and Photo documentation: helps in crossdating and archivingarchiving
• Ensure all samples and equipment are accounted for Ensure all samples and equipment are accounted for before heading back.before heading back.
• Clean all your equipment!Clean all your equipment!
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Using a Chain SawUsing a Chain Saw