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Before each crop for high-value cash crops. Sandy soils every 2 to 3 years, clay soils every 3 to 4 years. Every year where earlier tests showed levels too high or too low.\"}},{\"@type\":\"Question\",\"name\":\"When in the year should soil be sampled in Nevada?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"University of Nevada, Reno Extension sampling advice (official guidance): After harvest and before planting the next crop, around the same month each year. Avoid sampling soon after fertilizer or manure applications.\"}},{\"@type\":\"Question\",\"name\":\"How deep should soil samples be taken in Nevada?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"University of Nevada, Reno Extension sampling advice (official guidance): 15 cm (6 inches) for shallow-rooted crops, 30 cm (12 inches) for deep-rooted crops. In some cases on light-textured soils where nutrients leach, separate deeper samples from 15 to 60 cm (6 to 24 inches) for available nitrogen and sulfur.\"}},{\"@type\":\"Question\",\"name\":\"How many cores go into one soil sample in Nevada?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"University of Nevada, Reno Extension sampling advice (official guidance): Two or three cores per acre in each unit. At least 15 to 20 cores on uniform fields.\"}}]}<\/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\">Nevada<\/span><\/nav><h1>Soil sampling requirements in Nevada<\/h1><p class=\"ssr-lede\">State guidance: University of Nevada, Reno Extension sampling advice.<\/p><\/div><section class=\"ssr-ans\" aria-labelledby=\"ssr-ans-h\"><h2 id=\"ssr-ans-h\">Soil sampling in Nevada: 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 Nevada?<\/h3><ul data-no-translation><li><a href=\"#rule-us-nv-extension-soil-sampling\">University of Nevada, Reno Extension sampling advice<\/a> <span class=\"ssr-ans-t\">Official guidance<\/span> Every 2 to 3 years for most crops. Before each crop for high-value cash crops. Sandy soils every 2 to 3 years, clay soils every 3 to 4 years. Every year where earlier tests showed levels too high or too low.<\/li><\/ul><\/div><div class=\"ssr-ans-q\"><h3>When in the year should soil be sampled in Nevada?<\/h3><ul data-no-translation><li><a href=\"#rule-us-nv-extension-soil-sampling\">University of Nevada, Reno Extension sampling advice<\/a> <span class=\"ssr-ans-t\">Official guidance<\/span> After harvest and before planting the next crop, around the same month each year. Avoid sampling soon after fertilizer or manure applications.<\/li><\/ul><\/div><div class=\"ssr-ans-q\"><h3>How deep should soil samples be taken in Nevada?<\/h3><ul data-no-translation><li><a href=\"#rule-us-nv-extension-soil-sampling\">University of Nevada, Reno Extension sampling advice<\/a> <span class=\"ssr-ans-t\">Official guidance<\/span> 15 cm (6 inches) for shallow-rooted crops, 30 cm (12 inches) for deep-rooted crops. In some cases on light-textured soils where nutrients leach, separate deeper samples from 15 to 60 cm (6 to 24 inches) for available nitrogen and sulfur.<\/li><\/ul><\/div><div class=\"ssr-ans-q\"><h3>How many cores go into one soil sample in Nevada?<\/h3><ul data-no-translation><li><a href=\"#rule-us-nv-extension-soil-sampling\">University of Nevada, Reno Extension sampling advice<\/a> <span class=\"ssr-ans-t\">Official guidance<\/span> Two or three cores per acre in each unit. At least 15 to 20 cores on uniform fields.<\/li><\/ul><\/div><\/div><\/section>\n<section aria-label=\"Rules in Nevada\">\n<div class=\"ssr-scroll\" data-no-translation>\n<table class=\"ssr-table\" role=\"table\" aria-label=\"Soil sampling rules in Nevada\">\n<caption>Soil sampling rules in Nevada, 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-nv-extension-soil-sampling\" class=\"ssr-rec\" role=\"rowgroup\" data-c=\"US\" data-r=\"US-NV\" data-p=\"fertility\" data-s=\"official_guidance\" data-m=\"representative\" data-q=\"united states | nevada | university of nevada, reno extension sampling advice | routine soil fertility sampling | university of nevada, reno extension, know the status of your soils before you plant (fs-19-17) | ph, p, k, mg | nevada | unr | university of nevada reno extension | fs-19-17\">\n<tr role=\"row\" class=\"ssr-main\"><th role=\"rowheader\" scope=\"row\" data-label=\"Country \/ region\"><span class=\"ssr-place\">Nevada<\/span><span class=\"ssr-sub\">United States<\/span><span class=\"ssr-sub\">Nevada 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\">University of Nevada, Reno Extension sampling advice<\/span><\/td><td role=\"cell\" data-label=\"Time \/ frequency\"><ul class=\"ssr-time\"><li><span class=\"k\">Repeat<\/span> Every 2 to 3 years for most crops. Before each crop for high-value cash crops. Sandy soils every 2 to 3 years, clay soils every 3 to 4 years. Every year where earlier tests showed levels too high or too low.<\/li><li><span class=\"k\">Season<\/span> After harvest and before planting the next crop, around the same month each year<\/li><li><span class=\"k\">Wait<\/span> Avoid sampling soon after fertilizer or manure applications<\/li><\/ul><\/td><td role=\"cell\" data-label=\"Area per sample\"><span class=\"ssr-ns\">Not specified<\/span><\/td><td role=\"cell\" data-label=\"Method\">Divide the field into similar units by soil, slope, drainage, erosion and history. Random cores in a zigzag pattern in each unit; a simple random pattern on uniform fields.<\/td><td role=\"cell\" data-label=\"Depth\">15 cm (6 inches) for shallow-rooted crops, 30 cm (12 inches) for deep-rooted crops. In some cases on light-textured soils where nutrients leach, separate deeper samples from 15 to 60 cm (6 to 24 inches) for available nitrogen and sulfur.<\/td><td role=\"cell\" data-label=\"Cores\">Two or three cores per acre in each unit. At least 15 to 20 cores on uniform fields.<\/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:\/\/extension.unr.edu\/publication.aspx?PubID=2849\" data-ssr-src rel=\"noopener\">University of Nevada, Reno Extension, FS-19-17<\/a><\/td><\/tr>\n<tr role=\"row\" class=\"ssr-more\"><td role=\"cell\" colspan=\"8\"><details data-id=\"us-nv-extension-soil-sampling\" data-c=\"Nevada\"><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 for Nevada growers from the University of Nevada, Reno Extension. Not law.<\/dd><\/div><div><dt>In force from<\/dt><dd>Under review<\/dd><\/div><div><dt>Legal text<\/dt><dd>University of Nevada, Reno Extension, Know the Status of Your Soils Before You Plant (FS-19-17)<\/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\">Generally, soil should be sampled every two to three years for most crops. However, for high-value cash crops, soil should be sampled and tested before each crop is planted.<\/blockquote><p class=\"ssr-q-cite\"><a href=\"https:\/\/extension.unr.edu\/publication.aspx?PubID=2849\" data-ssr-src rel=\"noopener\">FS-19-17, Time and frequency of soil testing<\/a><\/p><\/li><li><blockquote class=\"ssr-q\" lang=\"en\">it is recommended that sandy soils be sampled and tested every two to three years and clay soils be tested every three to four years.<\/blockquote><p class=\"ssr-q-cite\"><a href=\"https:\/\/extension.unr.edu\/publication.aspx?PubID=2849\" data-ssr-src rel=\"noopener\">FS-19-17, Time and frequency of soil testing<\/a><\/p><\/li><li><blockquote class=\"ssr-q\" lang=\"en\">Soil should also be re-tested every year if nutrient levels are too high or low in previous tests to determine the changes in nutrient levels.<\/blockquote><p class=\"ssr-q-cite\"><a href=\"https:\/\/extension.unr.edu\/publication.aspx?PubID=2849\" data-ssr-src rel=\"noopener\">FS-19-17, Time and frequency of soil testing<\/a><\/p><\/li><li><blockquote class=\"ssr-q\" lang=\"en\">it is recommended to sample around the same month of the year to reduce seasonal variations in soil test records. In general, the most important time to test soil is after harvest and before planting of a subsequent crop.<\/blockquote><p class=\"ssr-q-cite\"><a href=\"https:\/\/extension.unr.edu\/publication.aspx?PubID=2849\" data-ssr-src rel=\"noopener\">FS-19-17, Time and frequency of soil testing<\/a><\/p><\/li><li><blockquote class=\"ssr-q\" lang=\"en\">Soil sampling soon after fertilizer or manure applications should be avoided.<\/blockquote><p class=\"ssr-q-cite\"><a href=\"https:\/\/extension.unr.edu\/publication.aspx?PubID=2849\" data-ssr-src rel=\"noopener\">FS-19-17, Soil sample collection<\/a><\/p><\/li><\/ul><h4>Method<\/h4><ul class=\"ssr-quotes\"><li><blockquote class=\"ssr-q\" lang=\"en\">Soil samples should be collected by dividing the field into similar units or blocks based upon differences in the soil. These differences could be in color, soil types, slope, drainage, degree of erosion, prior management, different crop or manure history, etc.<\/blockquote><p class=\"ssr-q-cite\"><a href=\"https:\/\/extension.unr.edu\/publication.aspx?PubID=2849\" data-ssr-src rel=\"noopener\">FS-19-17, Soil sample collection<\/a><\/p><\/li><li><blockquote class=\"ssr-q\" lang=\"en\">For uniform fields, a simple random pattern across the field should be used to collect at least 15 to 20 soil cores to equal depths.<\/blockquote><p class=\"ssr-q-cite\"><a href=\"https:\/\/extension.unr.edu\/publication.aspx?PubID=2849\" data-ssr-src rel=\"noopener\">FS-19-17, Soil sample collection<\/a><\/p><\/li><\/ul><h4>Depth<\/h4><ul class=\"ssr-quotes\"><li><blockquote class=\"ssr-q\" lang=\"en\">Then, dig down to a plough depth of 15 cm (6 inches) for shallow-rooted crops and 30 cm (12 inches) for deep-rooted crops (Figure 5).<\/blockquote><p class=\"ssr-q-cite\"><a href=\"https:\/\/extension.unr.edu\/publication.aspx?PubID=2849\" data-ssr-src rel=\"noopener\">FS-19-17, Basic steps<\/a><\/p><\/li><li><blockquote class=\"ssr-q\" lang=\"en\">in light-texture soils, where excessive leaching of nutrients occurs, separate deeper samples, down to 15-60 cm (6-24 inches), should be collected and analyzed to determine available nitrogen and sulfur in some cases<\/blockquote><p class=\"ssr-q-cite\"><a href=\"https:\/\/extension.unr.edu\/publication.aspx?PubID=2849\" data-ssr-src rel=\"noopener\">FS-19-17, Basic steps<\/a><\/p><\/li><\/ul><h4>Cores<\/h4><ul class=\"ssr-quotes\"><li><blockquote class=\"ssr-q\" lang=\"en\">Several random samples should be collected from each area of each unit or block (two or three subsamples per acre) in a zigzag pattern (Figure 4).<\/blockquote><p class=\"ssr-q-cite\"><a href=\"https:\/\/extension.unr.edu\/publication.aspx?PubID=2849\" data-ssr-src rel=\"noopener\">FS-19-17, Soil sample collection<\/a><\/p><\/li><li><blockquote class=\"ssr-q\" lang=\"en\">For uniform fields, a simple random pattern across the field should be used to collect at least 15 to 20 soil cores to equal depths.<\/blockquote><p class=\"ssr-q-cite\"><a href=\"https:\/\/extension.unr.edu\/publication.aspx?PubID=2849\" data-ssr-src rel=\"noopener\">FS-19-17, Soil sample collection<\/a><\/p><\/li><\/ul><\/div><div class=\"ssr-srcbox\"><h3>Sources<\/h3><ul class=\"ssr-srcs\"><li><a href=\"https:\/\/extension.unr.edu\/publication.aspx?PubID=2849\" data-ssr-src rel=\"noopener\">University of Nevada, Reno Extension, FS-19-17<\/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>\u571f\u58cc\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\u898f\u5236 \/ \u30a2\u30e1\u30ea\u30ab\u5408\u8846\u56fd \/ \u30cd\u30d0\u30c0\u5dde \u30cd\u30d0\u30c0\u5dde\u306e\u571f\u58cc\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\u8981\u4ef6 \u5dde\u306e\u30ac\u30a4\u30c0\u30f3\u30b9: \u30cd\u30d0\u30c0\u5927\u5b66\u30ea\u30ce\u6821\u30a8\u30af\u30b9\u30c6\u30f3\u30b7\u30e7\u30f3\u306e\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\u306b\u95a2\u3059\u308b\u30a2\u30c9\u30d0\u30a4\u30b9\u3002\u571f\u58cc\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\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-15111","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - 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