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	1	+Amount of calcium|Conserving method|Lamination|Layering|Color|Odor|Oil/water reaction|Sampling humidity|Sampling methods|Sample quality class|Soil boundaries|Sorting|Soil consistency|Spot gradation|Tensile strength

Content

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15	15	A trail of spots most of the times indicates a flow of groundwater through the studied soil. A trail is a uninterrupted line of spots, like shown in the picture below. A ‘trail’ can also be found on a much smaller scale. The spots cover between the 20 and 50% of the surface.
16	16
	17	+(% style="text-align:center" %)
	18	+[[[[image:Trail.jpg]]>>https://www.usga.org/course-care/turfgrass-and-environmental-research/research-updates/2018/genesis-and-prevention-of-layers-in-putting-green-rootzone-profi.html]]
	19	+
17	17	= A lot =
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19	19	Large spots or even half of the soil which has a different color than it’s original color would indicate a large amount of a specific mineral or metal present in the soil. An example can be seen below. This can also be found on much smaller scale. The spots cover between the 2 and 20% of the surface.
20	20
	24	+(% style="text-align:center" %)
	25	+[[[[image:a lot.jpg||height="237" width="221"]]>>https://stormwater.pca.state.mn.us/index.php?title=File:Soil_color.jpg]]
	26	+
21	21	= A few =
22	22
23	23	Small spots and mostly less than 50% of the soil indicates a small amount of a specific mineral, metal or pollutive subject in the soil. An example of small spots can be seen below. This can also be found on much smaller scale. The spots cover between the 0 and 2% of the surface.
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	31	+(% style="text-align:center" %)
	32	+[[[[image:a few.jpg]]>>https://munsell.com/color-blog/rust-colored-soil-boreal-forest/]]
	33	+
25	25	= References =
26	26
27		-* [[XWiki>>http://www.xwiki.org]]
28		-* [[XWiki Extensions>>http://www.xwiki.org]]
	36	+* NEN-EN-ISO 14688-1:2019
	37	+* BRO-Catalogus Geologisch booronderzoek versie 0.99 – 25 maart 2020
29	29	)))
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31	31	(% class="col-xs-12 col-sm-4" %)
32	32	(((
33		-
34	34	(% class="box" %)
35	35	(((
36	36	**Contents**