<div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div>Hi Megan. You asked about these things below; I'm still not finding a place where we wrote it up specifically but I'm still looking...</div><div><p class="MsoNormal" style="color:rgb(0,0,0)"><br></p><ol start="1" type="1" style="color:rgb(0,0,0);margin-top:0cm"><li style="color:rgb(29,28,29);margin-left:0cm"><span style="font-size:11.5pt;background-color:rgb(248,248,248)">collection/s with soil sampling methods eg ‘coring’ ‘at depth sampling’, and<u></u><u></u></span></li></ol><div><font color="#1d1c1d"><span style="font-size:15.333333969116211px">"<b>Channel sample</b>" refers to soils sampled from a pit face or exposure and collected vertically from the top of the horizon or layer to the bottom horizon/layer . We have also referred to "<b>pit face </b>sample" on our sampling sheets. Specific notes about this however are rare unless the field sheet has an entry eg "hand dug pit" or "back hoe pit". It's rare for field sheets to be scanned or re-entered verbatim. this is about as close as we've gotten: </span></font><b><a href="https://pubs.usgs.gov/of/2001/0217/" target="_blank">https://pubs.usgs.gov/of/2001/0217/</a> See table 1 </b></div><div><font color="#1d1c1d"><span style="font-size:15.333333969116211px"><br></span></font></div><div><font color="#1d1c1d"><span style="font-size:15.333333969116211px">Peatlands are a different animal. See this publication for one example </span></font><a href="https://pubs.usgs.gov/of/2012/1230/">https://pubs.usgs.gov/of/2012/1230/</a></div><div><br></div><div><font color="#1d1c1d"><span style="font-size:15.333333969116211px">Here is from the text of that citation - I don't think there are good standard vocabularies for these !! "</span></font><span style="font-family:TimesNewRomanPSMT;font-size:12pt;color:rgb(0,0,0)">At all sites, organic soil was sampled using a variety of soil knives, scissors and corers, in order to obtain a sample of known volume. For easily compressible, low-density samples, soil blocks were cut with scissors or serrated knives and dimensions were measured with a ruler. For less compressible shallow soils, samples were obtained with a 50-mm diameter corer rotated with a portable electric drill (Nadler and Wein, 1998). For deeper unfrozen peats we used a 70-mm diameter by 130-centimeter (cm)-long tube that was pushed and rotated into the peat by hand. A rubber cap was tightened over the corer to maintain a vacuum in the corer during extraction. At permafrost plateau sites, permafrost cores (up to 5 meters) were obtained using a SIPRE (Snow, Ice, and Permafrost Research Establishment) corer (7.5-cm inside diameter) with a Tanaka power head. We sampled peat until either a basal mineral or limnic horizon was encountered to allow calculation of OC stocks relative to a standard basal layer across sites. After collection, samples were placed in clean ziplock bags and shipped to U.S. Geological Survey (USGS) laboratories in Menlo Park, California."</span></div><div><br></div><div><br></div><div><font color="#1d1c1d"><span style="font-size:15.333333969116211px">For consistency , these terms are sometimes used:</span></font></div><div><font color="#1d1c1d"><span style="font-size:15.333333969116211px">"<b>Core sample</b>" refers to a vertical core whose diameter is sometimes known and sometimes used for bulk density</span></font></div><div><font color="#1d1c1d"><span style="font-size:15.333333969116211px"><br></span></font></div><div><font color="#1d1c1d"><span style="font-size:15.333333969116211px">"<b>Auger sample</b>" refers also to a vertical core but diameter is often not known because the bit at the end can be open/screw type and not all of the sample is retained</span></font></div><div><font color="#1d1c1d"><span style="font-size:15.333333969116211px"><br></span></font></div><div><font color="#1d1c1d"><span style="font-size:15.333333969116211px"> "Drive depths" used mostly in peat cores refers to how deep the core was driven for the sample; drive depth typically has an upper and lower boundary. </span></font></div><div><font color="#1d1c1d"><span style="font-size:15.333333969116211px"><br></span></font></div><div><font color="#1d1c1d"><span style="font-size:15.333333969116211px">"Recovery depth" in peat cores is a victim of compaction during the core driving; bulk density requires some sort of reckoning with the drive depth.</span></font></div><div><font color="#1d1c1d"><span style="font-size:15.333333969116211px"><br></span></font></div><div><font color="#1d1c1d"><span style="font-size:15.333333969116211px"><br></span></font></div><div><font color="#1d1c1d"><span style="font-size:15.333333969116211px"><br></span></font></div><div><font color="#1d1c1d"><span style="font-size:15.333333969116211px"><br></span></font></div><div><font color="#1d1c1d"><span style="font-size:15.333333969116211px"><br></span></font></div><div><font color="#1d1c1d"><span style="font-size:15.333333969116211px"><br></span></font></div><div><font color="#1d1c1d"><span style="font-size:15.333333969116211px"><br></span></font></div><ol start="1" type="1" style="color:rgb(0,0,0);margin-top:0cm"><li style="color:rgb(29,28,29);margin-left:0cm"><span style="font-size:11.5pt;background-color:rgb(248,248,248)">2. collection/s to describe the types of physical samples that observations are made on (which may be stored or thrown out once an observation is made on them) such as physical soil cores, subsamples etc.</span></li></ol><div><font color="#1d1c1d"><span style="font-size:15.333333969116211px"><br></span></font></div><div><font color="#1d1c1d"><span style="font-size:15.333333969116211px"><br></span></font></div><div><font color="#1d1c1d"><span style="font-size:15.333333969116211px"><br></span></font></div><div><font color="#1d1c1d"><span style="font-size:15.333333969116211px">Great question. for clarity of how things sometimes get processed, sometimes we used "a" for archived; "m" for moisture; "b" for bulk density; "i" for incubation; 14C or 13C for isotopes to refer to why the sample was collected in the first place - that way the lab person knew how to handle the sample. </span></font></div></div><div><font color="#1d1c1d"><span style="font-size:15.333333969116211px">So there are different types of splits:</span></font></div><div><font color="#1d1c1d"><span style="font-size:15.333333969116211px">Splits of the same sample from the field: typically subscripts are used (a,b,c or 1,2,3)</span></font></div><div><font color="#1d1c1d"><span style="font-size:15.333333969116211px">Splits of the sample after homogenized in the lab: usually "1 of 2" etc</span></font></div><div><font color="#1d1c1d"><span style="font-size:15.333333969116211px">Citation:not sure we have one!</span></font></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Feb 13, 2021 at 8:17 PM Megan Wong via Esip-soil-informatics <<a href="mailto:esip-soil-informatics@lists.esipfed.org" target="_blank">esip-soil-informatics@lists.esipfed.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex">
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<p class="MsoNormal"><span style="font-size:11.5pt;color:rgb(29,28,29);background-color:rgb(248,248,248)">Hello soil information folks,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.5pt;color:rgb(29,28,29);background-color:rgb(248,248,248)"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.5pt;color:rgb(29,28,29);background-color:rgb(248,248,248)">I hope you are all well. I am sorry to bother you with this enquiry by email, but I’m hoping amongst this community of experts someone may be able to help me out.
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<span style="background-color:rgb(248,248,248)">To those of you who use soil related controlled vocabularies, can someone point me toward<u></u><u></u></span></span></p>
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<li style="color:rgb(29,28,29);margin-left:0cm">
<span style="font-size:11.5pt;background-color:rgb(248,248,248)">collection/s with soil sampling methods eg ‘coring’ ‘at depth sampling’, and
<u></u><u></u></span></li><li style="color:rgb(29,28,29);margin-left:0cm">
<span style="font-size:11.5pt;background-color:rgb(248,248,248)">collection/s to describe the types of physical samples that observations are made on (which may be stored or thrown out once an observation is made on them) such as physical soil cores, subsamples etc.
<u></u><u></u></span></li></ol>
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<p class="MsoNormal"><span style="font-size:11.5pt;color:rgb(29,28,29);background-color:rgb(248,248,248)">These are distinct from soil features, for which we are using INPIRE </span><a href="http://inspire.ec.europa.eu/featureconcept" target="_blank"><span style="font-size:11.5pt;background-color:rgb(248,248,248)">http://inspire.ec.europa.eu/featureconcept</span></a><span style="font-size:11.5pt;color:rgb(29,28,29);background-color:rgb(248,248,248)"> .
<u></u><u></u></span></p>
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<p class="MsoNormal"><span style="font-size:11.5pt;color:rgb(29,28,29);background-color:rgb(248,248,248)">Ideally, these would be as controlled vocabulary terms that are readable to humans and machines
<u></u><u></u></span></p>
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<p class="MsoNormal"><span style="font-size:11.5pt;color:rgb(29,28,29);background-color:rgb(248,248,248)">I've searched high and low - Perhaps the creation of a soil ontology will help ease some of these pain points! I’ve added to </span><a href="https://docs.google.com/spreadsheets/d/11oY2TIQIVnaNYfG-nXiOfWyQ17uVlReNX4qrdOYddeg/edit#gid=0" target="_blank"><span style="font-size:11.5pt;background-color:rgb(248,248,248)">https://docs.google.com/spreadsheets/d/11oY2TIQIVnaNYfG-nXiOfWyQ17uVlReNX4qrdOYddeg/edit#gid=0</span></a><span style="font-size:11.5pt;color:rgb(29,28,29);background-color:rgb(248,248,248)"> .</span><u></u><u></u></p>
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<p class="MsoNormal">If anyone is able to offer any advice here I am most grateful for your time
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<p class="MsoNormal">Best Regards,<u></u><u></u></p>
<p class="MsoNormal">Megan<u></u><u></u></p>
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<p class="MsoNormal"><b><span style="font-size:10pt;font-family:Arial,sans-serif;color:black">Dr Megan Wong</span></b><span style="font-size:10pt;color:black"><u></u><u></u></span></p>
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