| CPC G01N 1/08 (2013.01) [A01C 23/007 (2013.01); B01D 19/00 (2013.01); B01D 21/262 (2013.01); B01D 29/112 (2013.01); B01F 23/53 (2022.01); B01F 23/807 (2022.01); B01F 23/808 (2022.01); B01F 25/30 (2022.01); B01F 25/54 (2022.01); B01F 27/11253 (2022.01); B01F 27/808 (2022.01); B01F 27/906 (2022.01); B01F 35/1452 (2022.01); B01F 35/187 (2022.01); B01F 35/2117 (2022.01); B01F 35/453 (2022.01); B04B 5/0421 (2013.01); F04B 43/06 (2013.01); G01G 17/04 (2013.01); G01N 1/38 (2013.01); G01N 1/4055 (2013.01); G01N 1/4077 (2013.01); G01N 21/05 (2013.01); G01N 21/251 (2013.01); G01N 21/78 (2013.01); G01N 33/24 (2013.01); G01N 35/00584 (2013.01); G01N 35/1004 (2013.01); G01N 35/1095 (2013.01); G05B 15/02 (2013.01); B01D 2201/4092 (2013.01); B01F 23/581 (2022.01); B01F 2101/005 (2022.01); B01F 2101/23 (2022.01); G01N 2001/4061 (2013.01); G01N 2001/4083 (2013.01); G01N 2001/4088 (2013.01); G01N 2033/245 (2013.01); G01N 2035/00188 (2013.01); G01N 2035/00475 (2013.01); G01N 2035/00495 (2013.01); G01N 2035/00514 (2013.01)] | 20 Claims |

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1. A coulter assembly for collecting soil samples from an agricultural field, the assembly comprising:
an annular collection blade configured for penetrating soil to capture a sample;
an annular indexing ring configured for stationary mounting to a frame of an agricultural vehicle or implement, the annular indexing ring comprising at least one indexing segment;
a blade hub coupled to the annular collection blade for rotatably supporting the annular collection blade from the annular indexing ring, the annular collection blade rotatable relative to the annular indexing ring;
a sample collection shaft rotatably supported by the annular collection blade and defining a radial axis of rotation, the sample collection shaft comprising an operating end configured to engage the at least one indexing segment of the annular indexing ring as the collection blade rotates;
the at least one indexing segment of the indexing ring being configured to cause rotation of the sample collection shaft about its radial axis of rotation;
wherein the sample collection shaft is configured and operable for extracting a soil sample as the annular collection blade is rotated through the soil.
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