{"id":{"repo_id":"sdstate","oai_identifier":"oai:openprairie.sdstate.edu:etd-1614"},"canonical_url":"https://search.dev.ndltd.org/etd/sdstate/oai:openprairie.sdstate.edu:etd-1614","repository":{"repo_id":"sdstate","name":"South Dakota State University","base_url":"https://openprairie.sdstate.edu/do/oai/"},"display":{"title":"A Tractor Mounted Device Used for Comparison of In-Situ Soil Bearing Capacity Between Two Tillage Regimes","abstract":"<p>A device mounted to the three-point hitch of a tractor to measure in-situ soil bearing capacity and cone index was developed and tested. The device contained a footing for bearing capacity tests and a probe for cone penetrometer tests. A hydraulic cylinder powered by the tractor's auxiliary hydraulic circuit forced the footing or cone penetrometer into the soil. Load cells were used to measure bearing plate and cone penetrometer loads. A linear potentiometer was used to measure penetration depth. This device is capable of measuring bearing capacities up to approximately 560 kPa and cone index up to about 7 MPa. A computer-implemented data acquisition system with National Instruments LabView software was used to measure, display, and record data.<br> Tests were performed in fields containing silty clay loam soils located about 2 miles northwest of Brookings, SD. The following conclusions were obtained for the soil bearing capacity and cone penetrometer tests. For com plots, a tilled soil exhibited significantly higher bearing capacities for all three plots compared to a no-till soil, while cone index tests revealed no significant difference. The overall average bearing capacities in the com plots for tilled and no-till were 488.8 and 440.0 kPa, respectively. For wheat plots, a tilled soil exhibited significantly higher bearing capacities for 2 plots and no significant difference for a third plot compared to a no-till soil. The overall average bearing capacities in the wheat plots for tilled and no-till were 505.4 and 477.1 kPa, respectively. Cone index tests in the wheat plots indicated a significant difference in tillage regimes at the 0.05-0.12 m range with higher cone indices in the no-till plots.</p>","abstract_html":"&lt;p&gt;A device mounted to the three-point hitch of a tractor to measure in-situ soil bearing capacity and cone index was developed and tested. The device contained a footing for bearing capacity tests and a probe for cone penetrometer tests. A hydraulic cylinder powered by the tractor&#x27;s auxiliary hydraulic circuit forced the footing or cone penetrometer into the soil. Load cells were used to measure bearing plate and cone penetrometer loads. A linear potentiometer was used to measure penetration depth. This device is capable of measuring bearing capacities up to approximately 560 kPa and cone index up to about 7 MPa. A computer-implemented data acquisition system with National Instruments LabView software was used to measure, display, and record data.&lt;br&gt; Tests were performed in fields containing silty clay loam soils located about 2 miles northwest of Brookings, SD. The following conclusions were obtained for the soil bearing capacity and cone penetrometer tests. For com plots, a tilled soil exhibited significantly higher bearing capacities for all three plots compared to a no-till soil, while cone index tests revealed no significant difference. The overall average bearing capacities in the com plots for tilled and no-till were 488.8 and 440.0 kPa, respectively. For wheat plots, a tilled soil exhibited significantly higher bearing capacities for 2 plots and no significant difference for a third plot compared to a no-till soil. The overall average bearing capacities in the wheat plots for tilled and no-till were 505.4 and 477.1 kPa, respectively. Cone index tests in the wheat plots indicated a significant difference in tillage regimes at the 0.05-0.12 m range with higher cone indices in the no-till plots.&lt;/p&gt;","abstract_has_math":false,"creators":["Jahn, Bernard R."],"institution":null,"degree_name":"Master of Science (MS)","degree_level":"Thesis - University Access Only","degree_discipline":"Agricultural and Biosystems Engineering","degree_department":null,"school":null,"contributors":["Daniel S. Humburg"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2002,"date_issued":"2002-01-01T08:00:00Z","date_published":"2002-01-01T08:00:00Z","updated_at":"2026-07-24T04:28:04Z","subjects":["Bioresource and Agricultural Engineering"],"languages":["en"],"rights":["Copyright © 2002 Bernard R. Jahn. All rights reserved"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://openprairie.sdstate.edu/etd/614","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Daniel S. 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All rights reserved"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://openprairie.sdstate.edu/etd/614"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["<p>A device mounted to the three-point hitch of a tractor to measure in-situ soil bearing capacity and cone index was developed and tested. The device contained a footing for bearing capacity tests and a probe for cone penetrometer tests. A hydraulic cylinder powered by the tractor's auxiliary hydraulic circuit forced the footing or cone penetrometer into the soil. Load cells were used to measure bearing plate and cone penetrometer loads. A linear potentiometer was used to measure penetration depth. This device is capable of measuring bearing capacities up to approximately 560 kPa and cone index up to about 7 MPa. A computer-implemented data acquisition system with National Instruments LabView software was used to measure, display, and record data.<br> Tests were performed in fields containing silty clay loam soils located about 2 miles northwest of Brookings, SD. The following conclusions were obtained for the soil bearing capacity and cone penetrometer tests. For com plots, a tilled soil exhibited significantly higher bearing capacities for all three plots compared to a no-till soil, while cone index tests revealed no significant difference. The overall average bearing capacities in the com plots for tilled and no-till were 488.8 and 440.0 kPa, respectively. For wheat plots, a tilled soil exhibited significantly higher bearing capacities for 2 plots and no significant difference for a third plot compared to a no-till soil. The overall average bearing capacities in the wheat plots for tilled and no-till were 505.4 and 477.1 kPa, respectively. Cone index tests in the wheat plots indicated a significant difference in tillage regimes at the 0.05-0.12 m range with higher cone indices in the no-till plots.</p>"]},{"key":"dc:title","label":"Title","values":["A Tractor Mounted Device Used for Comparison of In-Situ Soil Bearing Capacity Between Two Tillage Regimes"]}]}],"canonical_facts":{"dc:contributor":["Daniel S. Humburg"],"dc:creator":["Jahn, Bernard R."],"dc:description.abstract":["<p>A device mounted to the three-point hitch of a tractor to measure in-situ soil bearing capacity and cone index was developed and tested. The device contained a footing for bearing capacity tests and a probe for cone penetrometer tests. A hydraulic cylinder powered by the tractor's auxiliary hydraulic circuit forced the footing or cone penetrometer into the soil. Load cells were used to measure bearing plate and cone penetrometer loads. A linear potentiometer was used to measure penetration depth. This device is capable of measuring bearing capacities up to approximately 560 kPa and cone index up to about 7 MPa. A computer-implemented data acquisition system with National Instruments LabView software was used to measure, display, and record data.<br> Tests were performed in fields containing silty clay loam soils located about 2 miles northwest of Brookings, SD. The following conclusions were obtained for the soil bearing capacity and cone penetrometer tests. For com plots, a tilled soil exhibited significantly higher bearing capacities for all three plots compared to a no-till soil, while cone index tests revealed no significant difference. The overall average bearing capacities in the com plots for tilled and no-till were 488.8 and 440.0 kPa, respectively. For wheat plots, a tilled soil exhibited significantly higher bearing capacities for 2 plots and no significant difference for a third plot compared to a no-till soil. The overall average bearing capacities in the wheat plots for tilled and no-till were 505.4 and 477.1 kPa, respectively. Cone index tests in the wheat plots indicated a significant difference in tillage regimes at the 0.05-0.12 m range with higher cone indices in the no-till plots.</p>"],"dc:identifier":["https://openprairie.sdstate.edu/etd/614"],"dc:language":["en"],"dc:rights":["Copyright © 2002 Bernard R. Jahn. All rights reserved"],"dc:subject":["Bioresource and Agricultural Engineering"],"dc:title":["A Tractor Mounted Device Used for Comparison of In-Situ Soil Bearing Capacity Between Two Tillage Regimes"],"thesis:degree_discipline":["Agricultural and Biosystems Engineering"],"thesis:degree_level":["Thesis - University Access Only"],"thesis:degree_name":["Master of Science (MS)"]},"updated_at":"2026-07-24T04:28:04Z"}