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Grids of 2.5 or 5 acres are widely used.\"}},{\"@type\":\"Question\",\"name\":\"How deep should soil samples be taken in Tennessee?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"UT Extension, Soil Testing for Commercial Farmers (official guidance): 6 inches (15.24 cm) for pH, P, K, Ca, Mg, micronutrients and organic matter. 12 inches (30.48 cm) for the corn pre-sidedress nitrate test.\"}},{\"@type\":\"Question\",\"name\":\"How many cores go into one soil sample in Tennessee?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"UT Extension, Soil Testing for Commercial Farmers (official guidance): About 20 locations per composite. Six or eight cores per grid sample.\"}},{\"@type\":\"Question\",\"name\":\"How many soil samples does a 100-acre field need in Tennessee?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Under UT Extension, Soil Testing for Commercial Farmers: A uniform 100-acre field needs at least 10 composite samples of no more than 10 acres each, and at least 60 cores in all, 6 per sample.\"}}]}<\/script>\n<div class=\"ssr-hero ssr-hero-country\"><nav class=\"ssr-crumbs\" aria-label=\"Breadcrumb\"><a href=\"https:\/\/geopard.tech\/soil-sampling-regulations\/\">Soil sampling regulations<\/a> <span aria-hidden=\"true\">\/<\/span> <a href=\"https:\/\/geopard.tech\/soil-sampling-regulations\/united-states\/\">United States<\/a> <span aria-hidden=\"true\">\/<\/span> <span aria-current=\"page\">Tennessee<\/span><\/nav><h1>Soil sampling requirements in Tennessee<\/h1><p class=\"ssr-lede\">State guidance: UT Extension, Soil Testing for Commercial Farmers.<\/p><\/div><section class=\"ssr-ans\" aria-labelledby=\"ssr-ans-h\"><h2 id=\"ssr-ans-h\">Soil sampling in Tennessee: frequency, area, depth and cores<\/h2><div class=\"ssr-ans-grid\"><div class=\"ssr-ans-q\"><h3>How often do you need to soil sample in Tennessee?<\/h3><ul data-no-translation><li><a href=\"#rule-us-tn-ut-extension-soil-sampling\">UT Extension, Soil Testing for Commercial Farmers<\/a> <span class=\"ssr-ans-t\">Official guidance<\/span> Continuous conventional row crops every 2 to 3 years. Double cropping, continuous no-till corn or cotton, and hay every 2 years. Continuous no-till soybeans only, and pasture, every 3 to 5 years. Tobacco and vegetables every year.<\/li><\/ul><\/div><div class=\"ssr-ans-q\"><h3>When in the year should soil be sampled in Tennessee?<\/h3><ul data-no-translation><li><a href=\"#rule-us-tn-ut-extension-soil-sampling\">UT Extension, Soil Testing for Commercial Farmers<\/a> <span class=\"ssr-ans-t\">Official guidance<\/span> September to November, or March to April.<\/li><\/ul><\/div><div class=\"ssr-ans-q\"><h3>How many acres can one soil sample cover in Tennessee?<\/h3><ul data-no-translation><li><a href=\"#rule-us-tn-ut-extension-soil-sampling\">UT Extension, Soil Testing for Commercial Farmers<\/a> <span class=\"ssr-ans-t\">Official guidance<\/span> A composite from an area of no more than 10 acres (4.05 ha). Grids of 2.5 or 5 acres are widely used.<\/li><\/ul><\/div><div class=\"ssr-ans-q\"><h3>How deep should soil samples be taken in Tennessee?<\/h3><ul data-no-translation><li><a href=\"#rule-us-tn-ut-extension-soil-sampling\">UT Extension, Soil Testing for Commercial Farmers<\/a> <span class=\"ssr-ans-t\">Official guidance<\/span> 6 inches (15.24 cm) for pH, P, K, Ca, Mg, micronutrients and organic matter. 12 inches (30.48 cm) for the corn pre-sidedress nitrate test.<\/li><\/ul><\/div><div class=\"ssr-ans-q\"><h3>How many cores go into one soil sample in Tennessee?<\/h3><ul data-no-translation><li><a href=\"#rule-us-tn-ut-extension-soil-sampling\">UT Extension, Soil Testing for Commercial Farmers<\/a> <span class=\"ssr-ans-t\">Official guidance<\/span> About 20 locations per composite. Six or eight cores per grid sample.<\/li><\/ul><\/div><div class=\"ssr-ans-ex\"><h3>How many soil samples does a 100-acre field need in Tennessee?<\/h3><p><span data-no-translation>UT Extension, Soil Testing for Commercial Farmers:<\/span> A uniform 100-acre field needs at least 10 composite samples of no more than 10 acres each, and at least 60 cores in all, 6 per sample.<\/p><p><a href=\"https:\/\/geopard.tech\/soil-sampling-regulations\/#ssr-est\">Samples and cores for any field size<\/a><\/p><\/div><\/div><\/section>\n<section aria-label=\"Rules in Tennessee\">\n<div class=\"ssr-scroll\" data-no-translation>\n<table class=\"ssr-table\" role=\"table\" aria-label=\"Soil sampling rules in Tennessee\">\n<caption>Soil sampling rules in Tennessee, with the exact wording of each source<\/caption>\n<colgroup><col class=\"c-place\"><col class=\"c-pur\"><col class=\"c-time\"><col class=\"c-area\"><col class=\"c-meth\"><col class=\"c-depth\"><col class=\"c-cores\"><col class=\"c-stat\"><\/colgroup>\n      <thead role=\"rowgroup\"><tr role=\"row\">\n        <th role=\"columnheader\" scope=\"col\">Country \/ region<\/th>\n        <th role=\"columnheader\" scope=\"col\">Purpose \/ programme<\/th>\n        <th role=\"columnheader\" scope=\"col\">Time \/ frequency<\/th>\n        <th role=\"columnheader\" scope=\"col\">Area per sample<\/th>\n        <th role=\"columnheader\" scope=\"col\">Method<\/th>\n        <th role=\"columnheader\" scope=\"col\">Depth<\/th>\n        <th role=\"columnheader\" scope=\"col\">Cores<\/th>\n        <th role=\"columnheader\" scope=\"col\">Status and source<\/th>\n      <\/tr><\/thead>\n<tbody class=\"ssr-grp\" data-g=\"US\" role=\"rowgroup\"><tr role=\"row\"><th role=\"rowheader\" colspan=\"8\" scope=\"colgroup\" id=\"country-us\">United States<\/th><\/tr><\/tbody>\n<tbody id=\"rule-us-tn-ut-extension-soil-sampling\" class=\"ssr-rec\" role=\"rowgroup\" data-c=\"US\" data-r=\"US-TN\" data-p=\"fertility\" data-s=\"official_guidance\" data-m=\"pattern grid zone\" data-q=\"united states | tennessee | ut extension, soil testing for commercial farmers | routine soil fertility sampling | ut extension w 1194, soil testing for commercial farmers (9\/23) | ph, p, k, mg | tennessee | tn | ut extension | utia | w 1194 | university of tennessee\">\n<tr role=\"row\" class=\"ssr-main\"><th role=\"rowheader\" scope=\"row\" data-label=\"Country \/ region\"><span class=\"ssr-place\">Tennessee<\/span><span class=\"ssr-sub\">United States<\/span><span class=\"ssr-sub\">Tennessee only. Other states set their own rules.<\/span><\/th><td role=\"cell\" data-label=\"Purpose \/ programme\"><span class=\"ssr-pur\">Routine soil fertility sampling<\/span><span class=\"ssr-sub\">UT Extension, Soil Testing for Commercial Farmers<\/span><\/td><td role=\"cell\" data-label=\"Time \/ frequency\"><ul class=\"ssr-time\"><li><span class=\"k\">Repeat<\/span> Continuous conventional row crops every 2 to 3 years. Double cropping, continuous no-till corn or cotton, and hay every 2 years. Continuous no-till soybeans only, and pasture, every 3 to 5 years. Tobacco and vegetables every year.<\/li><li><span class=\"k\">Season<\/span> September to November, or March to April<\/li><\/ul><\/td><td role=\"cell\" data-label=\"Area per sample\">A composite from an area of no more than 10 acres (4.05 ha). Grids of 2.5 or 5 acres are widely used.<\/td><td role=\"cell\" data-label=\"Method\">Whole field composite in a zigzag pattern, grid, or zones built from soil type, lime and fertilizer history and yield maps. Sample contrasting areas separately.<\/td><td role=\"cell\" data-label=\"Depth\">6 inches (15.24 cm) for pH, P, K, Ca, Mg, micronutrients and organic matter. 12 inches (30.48 cm) for the corn pre-sidedress nitrate test.<\/td><td role=\"cell\" data-label=\"Cores\">About 20 locations per composite. Six or eight cores per grid sample.<\/td><td role=\"cell\" data-label=\"Status and source\" class=\"ssr-stat\"><span class=\"ssr-badge is-official_guidance\">Official guidance<\/span><a class=\"ssr-src\" href=\"https:\/\/soillab.tennessee.edu\/wp-content\/uploads\/sites\/129\/2026\/03\/Field-Soil-Sampling.pdf\" data-ssr-src rel=\"noopener\">UT Extension W 1194, Soil Testing for Commercial Farmers (PDF)<\/a><\/td><\/tr>\n<tr role=\"row\" class=\"ssr-more\"><td role=\"cell\" colspan=\"8\"><details data-id=\"us-tn-ut-extension-soil-sampling\" data-c=\"Tennessee\"><summary>Who it applies to, the exact wording and every source<\/summary><div class=\"ssr-det\"><dl class=\"ssr-facts\"><div><dt>Who it applies to<\/dt><dd>Advice from the public land-grant university extension service for Tennessee. Not law.<\/dd><\/div><div><dt>In force from<\/dt><dd>Under review<\/dd><\/div><div><dt>Legal text<\/dt><dd>UT Extension W 1194, Soil Testing for Commercial Farmers (9\/23)<\/dd><\/div><\/dl><div class=\"ssr-wording\"><h3>The wording in the source<\/h3><h4>Timing<\/h4><ul class=\"ssr-quotes\"><li><blockquote class=\"ssr-q\" lang=\"en\">Soil samples can be collected at any time from September to November (fall) or March to April (spring).<\/blockquote><p class=\"ssr-q-cite\"><a href=\"https:\/\/soillab.tennessee.edu\/wp-content\/uploads\/sites\/129\/2026\/03\/Field-Soil-Sampling.pdf\" data-ssr-src rel=\"noopener\">W 1194, When to sample?<\/a><\/p><\/li><li><blockquote class=\"ssr-q\" lang=\"en\">Continuous Row Crops (conventional) \u2026 every two to three years.<\/blockquote><p class=\"ssr-q-cite\"><a href=\"https:\/\/soillab.tennessee.edu\/wp-content\/uploads\/sites\/129\/2026\/03\/Field-Soil-Sampling.pdf\" data-ssr-src rel=\"noopener\">W 1194, How often should soils be tested?, item 1<\/a><\/p><\/li><li><blockquote class=\"ssr-q\" lang=\"en\">Double-cropping Systems \u2026 every two years.<\/blockquote><p class=\"ssr-q-cite\"><a href=\"https:\/\/soillab.tennessee.edu\/wp-content\/uploads\/sites\/129\/2026\/03\/Field-Soil-Sampling.pdf\" data-ssr-src rel=\"noopener\">item 2<\/a><\/p><\/li><li><blockquote class=\"ssr-q\" lang=\"en\">Continuous No-till Soybeans (only) \u2026 every three to five years.<\/blockquote><p class=\"ssr-q-cite\"><a href=\"https:\/\/soillab.tennessee.edu\/wp-content\/uploads\/sites\/129\/2026\/03\/Field-Soil-Sampling.pdf\" data-ssr-src rel=\"noopener\">item 3<\/a><\/p><\/li><li><blockquote class=\"ssr-q\" lang=\"en\">Continuous No-till Corn or Cotton \u2026 every two years.<\/blockquote><p class=\"ssr-q-cite\"><a href=\"https:\/\/soillab.tennessee.edu\/wp-content\/uploads\/sites\/129\/2026\/03\/Field-Soil-Sampling.pdf\" data-ssr-src rel=\"noopener\">item 4<\/a><\/p><\/li><li><blockquote class=\"ssr-q\" lang=\"en\">Hay Systems \u2026 every two years.<\/blockquote><p class=\"ssr-q-cite\"><a href=\"https:\/\/soillab.tennessee.edu\/wp-content\/uploads\/sites\/129\/2026\/03\/Field-Soil-Sampling.pdf\" data-ssr-src rel=\"noopener\">item 5<\/a><\/p><\/li><li><blockquote class=\"ssr-q\" lang=\"en\">High-value Cash Crops (tobacco, vegetables) \u2026 annually.<\/blockquote><p class=\"ssr-q-cite\"><a href=\"https:\/\/soillab.tennessee.edu\/wp-content\/uploads\/sites\/129\/2026\/03\/Field-Soil-Sampling.pdf\" data-ssr-src rel=\"noopener\">item 6<\/a><\/p><\/li><li><blockquote class=\"ssr-q\" lang=\"en\">Pasture Crops \u2026 every three to five years.<\/blockquote><p class=\"ssr-q-cite\"><a href=\"https:\/\/soillab.tennessee.edu\/wp-content\/uploads\/sites\/129\/2026\/03\/Field-Soil-Sampling.pdf\" data-ssr-src rel=\"noopener\">item 7<\/a><\/p><\/li><\/ul><h4>Area per sample<\/h4><ul class=\"ssr-quotes\"><li><blockquote class=\"ssr-q\" lang=\"en\">subsamples should be collected in a zigzag pattern from an area not to exceed ten acres<\/blockquote><p class=\"ssr-q-cite\"><a href=\"https:\/\/soillab.tennessee.edu\/wp-content\/uploads\/sites\/129\/2026\/03\/Field-Soil-Sampling.pdf\" data-ssr-src rel=\"noopener\">W 1194, Composite\/Whole Field Method<\/a><\/p><\/li><li><blockquote class=\"ssr-q\" lang=\"en\">A widely used method is to grid fields into two and a half or five acres.<\/blockquote><p class=\"ssr-q-cite\"><a href=\"https:\/\/soillab.tennessee.edu\/wp-content\/uploads\/sites\/129\/2026\/03\/Field-Soil-Sampling.pdf\" data-ssr-src rel=\"noopener\">W 1194, Grid Method<\/a><\/p><\/li><\/ul><h4>Method<\/h4><ul class=\"ssr-quotes\"><li><blockquote class=\"ssr-q\" lang=\"en\">The commonly used sampling methods include the composite\/whole field, the grid, and the zone.<\/blockquote><p class=\"ssr-q-cite\"><a href=\"https:\/\/soillab.tennessee.edu\/wp-content\/uploads\/sites\/129\/2026\/03\/Field-Soil-Sampling.pdf\" data-ssr-src rel=\"noopener\">W 1194, The Sampling Method<\/a><\/p><\/li><li><blockquote class=\"ssr-q\" lang=\"en\">Areas of contrasting soils, problem spots, areas under different management within the same field, or portions of fields where crop response is significantly different should be sampled separately, provided the area can be fertilized separately.<\/blockquote><p class=\"ssr-q-cite\"><a href=\"https:\/\/soillab.tennessee.edu\/wp-content\/uploads\/sites\/129\/2026\/03\/Field-Soil-Sampling.pdf\" data-ssr-src rel=\"noopener\">W 1194, Composite\/Whole Field Method<\/a><\/p><\/li><li><blockquote class=\"ssr-q\" lang=\"en\">Zones are developed based on knowledge about the field such as soil type, past lime and fertilization histories, yield maps<\/blockquote><p class=\"ssr-q-cite\"><a href=\"https:\/\/soillab.tennessee.edu\/wp-content\/uploads\/sites\/129\/2026\/03\/Field-Soil-Sampling.pdf\" data-ssr-src rel=\"noopener\">W 1194, Zone method<\/a><\/p><\/li><\/ul><h4>Depth<\/h4><ul class=\"ssr-quotes\"><li><blockquote class=\"ssr-q\" lang=\"en\">the recommended sampling depth at University of Tennessee is six inches (or 15 cm).<\/blockquote><p class=\"ssr-q-cite\"><a href=\"https:\/\/soillab.tennessee.edu\/wp-content\/uploads\/sites\/129\/2026\/03\/Field-Soil-Sampling.pdf\" data-ssr-src rel=\"noopener\">W 1194, Sampling Tools and Depths<\/a><\/p><\/li><li><blockquote class=\"ssr-q\" lang=\"en\">For the corn pre-sidedress nitrate-nitrogen test, collect samples to a depth of twelve inches (or 30 cm).<\/blockquote><p class=\"ssr-q-cite\"><a href=\"https:\/\/soillab.tennessee.edu\/wp-content\/uploads\/sites\/129\/2026\/03\/Field-Soil-Sampling.pdf\" data-ssr-src rel=\"noopener\">W 1194, Sampling Tools and Depths<\/a><\/p><\/li><\/ul><h4>Cores<\/h4><ul class=\"ssr-quotes\"><li><blockquote class=\"ssr-q\" lang=\"en\">a composite sample consisting of small portions of soil taken from approximately twenty locations<\/blockquote><p class=\"ssr-q-cite\"><a href=\"https:\/\/soillab.tennessee.edu\/wp-content\/uploads\/sites\/129\/2026\/03\/Field-Soil-Sampling.pdf\" data-ssr-src rel=\"noopener\">W 1194, Composite\/Whole Field Method<\/a><\/p><\/li><li><blockquote class=\"ssr-q\" lang=\"en\">The sample in each block consists of six or eight cores taken within a 60-foot radius from the sampling point.<\/blockquote><p class=\"ssr-q-cite\"><a href=\"https:\/\/soillab.tennessee.edu\/wp-content\/uploads\/sites\/129\/2026\/03\/Field-Soil-Sampling.pdf\" data-ssr-src rel=\"noopener\">W 1194, Grid Method<\/a><\/p><\/li><\/ul><\/div><div class=\"ssr-srcbox\"><h3>Sources<\/h3><ul class=\"ssr-srcs\"><li><a href=\"https:\/\/soillab.tennessee.edu\/wp-content\/uploads\/sites\/129\/2026\/03\/Field-Soil-Sampling.pdf\" data-ssr-src rel=\"noopener\">UT Extension W 1194, Soil Testing for Commercial Farmers (PDF)<\/a> <span class=\"ssr-kind\">Guidance<\/span><\/li><\/ul><p class=\"ssr-dates\">Sources re-checked every two months, last update October 2026. Reviewed by GeoPard editorial team.<\/p><\/div><\/div><\/details><\/td><\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p class=\"ssr-back\"><a href=\"https:\/\/geopard.tech\/soil-sampling-regulations\/united-states\/\">United States: federal rules and every other state<\/a><\/p>\n<p class=\"ssr-back\"><a href=\"https:\/\/geopard.tech\/soil-sampling-regulations\/\">Soil sampling regulations in every country<\/a><\/p>\n<p class=\"ssr-back\">Report an outdated requirement: <a href=\"mailto:info@geopard.tech?subject=Soil%20sampling%20regulations%20correction\">info@geopard.tech<\/a><\/p>\n<\/section>\n<\/div>\n\n\n\n<div class=\"gp-ssr\">\n<section class=\"ssr-cta-sec\">\n  <div class=\"ssr-cta\">\n    <h2>Plan the points to the rule that applies<\/h2>\n    <p>Set the area per sample, the cores and the depth your rule asks for. GeoPard places the points on a grid or by zone, routes the walk, prints the labels and takes the plan to the field on a phone.<\/p>\n    <div class=\"ssr-hero-btns\">\n      <a class=\"ssr-btn\" id=\"ssr-cta-main\" href=\"https:\/\/app.geopard.tech\/auth\/sign-up?utm_source=geopard.tech&amp;utm_medium=lead-magnet&amp;utm_campaign=soil-sampling-regulations&amp;utm_content=below-tool-cta\">Create a sampling plan<\/a>\n      <a class=\"ssr-btn-ghost\" id=\"ssr-cta-planner\" href=\"https:\/\/geopard.tech\/soil-sampling\/\">See the Soil Sampling Planner<\/a>\n    <\/div>\n  <\/div>\n<\/section>\n<p class=\"ssr-legal\">A planning reference built from official sources, not legal advice. Rules apply by jurisdiction, nutrient, land use and programme: check the current official text and your laboratory&#8217;s instructions before fieldwork.<\/p>\n<\/div>\n\n","protected":false},"excerpt":{"rendered":"<p>\u0422\u043e\u043f\u044b\u0440\u0430\u049b \u0441\u044b\u043d\u0430\u043c\u0430\u0441\u044b\u043d \u0430\u043b\u0443 \u0435\u0440\u0435\u0436\u0435\u043b\u0435\u0440\u0456 \/ \u0410\u043c\u0435\u0440\u0438\u043a\u0430 \u049a\u04b1\u0440\u0430\u043c\u0430 \u0428\u0442\u0430\u0442\u0442\u0430\u0440\u044b \/ \u0422\u0435\u043d\u043d\u0435\u0441\u0441\u0438 \u0422\u0435\u043d\u043d\u0435\u0441\u0441\u0438 \u0448\u0442\u0430\u0442\u044b\u043d\u0434\u0430\u0493\u044b \u0442\u043e\u043f\u044b\u0440\u0430\u049b \u0441\u044b\u043d\u0430\u043c\u0430\u0441\u044b\u043d \u0430\u043b\u0443 \u0442\u0430\u043b\u0430\u043f\u0442\u0430\u0440\u044b \u0431\u043e\u0439\u044b\u043d\u0448\u0430 \u043d\u04b1\u0441\u049b\u0430\u0443\u043b\u044b\u049b: UT \u043a\u0435\u04a3\u0435\u0439\u0442\u0456\u043c\u0456, \u043a\u043e\u043c\u043c\u0435\u0440\u0446\u0438\u044f\u043b\u044b\u049b \u0444\u0435\u0440\u043c\u0435\u0440\u043b\u0435\u0440\u0433\u0435 \u0430\u0440\u043d\u0430\u043b\u0493\u0430\u043d \u0442\u043e\u043f\u044b\u0440\u0430\u049b\u0442\u044b \u0441\u044b\u043d\u0430\u0443. \u0422\u043e\u043f\u044b\u0440\u0430\u049b \u0441\u044b\u043d\u0430\u043c\u0430\u0441\u044b\u043d \u0430\u043b\u0443\u2026<\/p>","protected":false},"author":210157960,"featured_media":0,"parent":14962,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","_eb_attr":"","content-type":"","_wpcom_ai_launchpad_about_page":false,"_wpcom_ai_launchpad_gallery_page":false,"_wpcom_ai_launchpad_contact_page":false,"_wpcom_ai_launchpad_events_page":false,"_wpcom_ai_launchpad_video_page":false,"_wpcom_ai_launchpad_portfolio_piece":false,"_jetpack_hide_featured_image":false,"_jetpack_featured_image_duplicate_dismissed":0,"footnotes":"","big_sky_generated":false},"class_list":["post-15124","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - 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