{"id":565,"date":"2014-07-08T16:32:33","date_gmt":"2014-07-08T21:32:33","guid":{"rendered":"http:\/\/www.agron.iastate.edu\/glsi\/?p=565"},"modified":"2025-10-01T13:29:14","modified_gmt":"2025-10-01T18:29:14","slug":"productivity-index-grid-conterminous-us-gis-data","status":"publish","type":"post","link":"https:\/\/www.agron.iastate.edu\/glsi\/gis-data\/soil-interpretations-gis-data\/productivity-index-grid-conterminous-us-gis-data\/","title":{"rendered":"Productivity Index Grid (conterminous U.S.) GIS Data"},"content":{"rendered":"\n<div class=\"wp-block-ugb-container ugb-container ugb-ee96871 ugb-container--v2 ugb-container--design-plain ugb-main-block\"><style>@media screen and (min-width:768px){.ugb-ee96871.ugb-container{margin-bottom:0px !important}}@media screen and (min-width:768px){.ugb-ee96871 > .ugb-inner-block > .ugb-block-content > *{padding-bottom:0px !important}}<\/style><div class=\"ugb-inner-block\"><div class=\"ugb-block-content\"><div class=\"ugb-container__wrapper ugb-ee96871-wrapper\"><div class=\"ugb-container__side\"><div class=\"ugb-container__content-wrapper ugb-ee96871-content-wrapper\"><div\n\tclass=\"paragraph-widget paragraph-widget--text-html\">\n\t<div class=\"text-content\">\n\t\t<h4>The Productivity Index (PI) maps the inherent, long-term capacity of soils across the lower 48 states to support plant growth. It is an <strong data-start=\"198\" data-end=\"209\">ordinal<\/strong> scale from 0 (least productive) to 19 (most productive) derived from family-level Soil Taxonomy attributes rather than short-term management effects. PI uses interpretations of taxonomic features that are consistently associated with lower or higher natural productivity and expresses them as a gridded surface for landscape analysis.<\/h4>\n\n\t<\/div>\n<\/div>\n<\/div><\/div><\/div><\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-ugb-container ugb-container ugb-8bdbc79 ugb-container--v2 ugb-container--design-plain ugb-main-block\"><style>@media screen and (min-width:768px){.ugb-8bdbc79.ugb-container{margin-bottom:0px !important}}@media screen and (min-width:768px){.ugb-8bdbc79 > .ugb-inner-block > .ugb-block-content > *{padding-top:0px !important;padding-bottom:0px !important}}<\/style><div class=\"ugb-inner-block\"><div class=\"ugb-block-content\"><div class=\"ugb-container__wrapper ugb-8bdbc79-wrapper\"><div class=\"ugb-container__side\"><div class=\"ugb-container__content-wrapper ugb-8bdbc79-content-wrapper\">\n<div class=\"wp-block-stackable-columns stk-block-columns stk-block stk-9cc33fa\" data-block-id=\"9cc33fa\"><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-9cc33fa-column\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-001bb93\" data-v=\"4\" data-block-id=\"001bb93\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-001bb93-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-001bb93-inner-blocks\"><div\n\tclass=\"paragraph-widget paragraph-widget--text-html\">\n\t<div class=\"text-content\">\n\t\t<h2>Applied Relevance<\/h2>\n<p>PI provides a stable, data-light indicator of potential productivity for regional planning, policy analysis, forestry and rangeland assessments, and ecological modeling. Because it reflects soil formation and morphology rather than current fertilization or tillage, it is well suited for comparing capability across counties, watersheds, and ecoregions and for screening areas where management or conservation investments are likely to yield the greatest return.<\/p>\n\n\t<\/div>\n<\/div>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-ce9246d\" data-v=\"4\" data-block-id=\"ce9246d\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-ce9246d-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-ce9246d-inner-blocks\">\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1066\" height=\"530\" src=\"https:\/\/www.agron.iastate.edu\/glsi\/files\/2014\/03\/The-soil-productivity-index.png\" alt=\"\" class=\"wp-image-11017\" srcset=\"https:\/\/www.agron.iastate.edu\/glsi\/files\/2014\/03\/The-soil-productivity-index.png 1066w, https:\/\/www.agron.iastate.edu\/glsi\/files\/2014\/03\/The-soil-productivity-index-300x149.png 300w, https:\/\/www.agron.iastate.edu\/glsi\/files\/2014\/03\/The-soil-productivity-index-1024x509.png 1024w, https:\/\/www.agron.iastate.edu\/glsi\/files\/2014\/03\/The-soil-productivity-index-768x382.png 768w\" sizes=\"auto, (max-width: 1066px) 100vw, 1066px\" \/><\/figure>\n<\/div><\/div><\/div>\n<\/div><\/div>\n<\/div><\/div><\/div><\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-ugb-container ugb-container ugb-d1207b7 ugb-container--v2 ugb-container--design-plain ugb-main-block\"><style>.ugb-d1207b7 .ugb-inner-block{text-align:center}@media screen and (min-width:768px){.ugb-d1207b7.ugb-container{margin-bottom:0px !important}}@media screen and (min-width:768px){.ugb-d1207b7 > .ugb-inner-block > .ugb-block-content > *{padding-top:0px !important}}<\/style><div class=\"ugb-inner-block\"><div class=\"ugb-block-content\"><div class=\"ugb-container__wrapper ugb-d1207b7-wrapper\"><div class=\"ugb-container__side\"><div class=\"ugb-container__content-wrapper ugb-d1207b7-content-wrapper\"><div\n\tclass=\"paragraph-widget paragraph-widget--text-html\">\n\t<div class=\"text-content\">\n\t\t<h2 class=\"text-align-center\">GIS Map Folder Download<\/h2>\n<p class=\"text-align-center\">Click the button below to access the GIS data.<\/p>\n\n\t<\/div>\n<\/div>\n\n\n<a href=\"https:\/\/www.agron.iastate.edu\/glsi\/?ddownload=4075\" title=\"Download\" rel=\"nofollow\" class=\"ddownload-button button-yellow id-4075 ext-\">Download<\/a>\n<\/div><\/div><\/div><\/div><\/div><\/div>\n\n\n<div\n\tclass=\"paragraph-widget paragraph-widget--text-html\">\n\t<div class=\"text-content\">\n\t\t<h2><strong data-start=\"1034\" data-end=\"1053\">Data and method<\/strong><\/h2>\n<p>Values originate from a Michigan State University\u2013U.S. Forest Service framework. Base ranks are assigned by soil order using traits linked to fertility potential, then adjusted within suborders, great groups, and subgroups to reflect systematic differences implied by taxonomy. Family-level texture is used to modify the rank for coarse versus fine materials, and additional adjustments consider properties such as organic matter, cation-exchange capacity, and clay mineralogy. These ranks are joined to digital soil maps and rendered as a raster for spatial analysis. Because the scale is ordinal, differences should be interpreted as <strong data-start=\"1692\" data-end=\"1704\">relative<\/strong> rather than absolute magnitudes.<\/p>\n<h2>Metadata \u2013 Sources \u2013 Limitations<\/h2>\n<p>PI represents inherent potential under natural conditions; it does not measure current yield, management level, irrigation, drainage, or recent land disturbance. Map-unit inclusions, taxonomic updates, and local variability can produce mismatches at fine scales. Use PI for screening and comparison, and confirm site-level expectations with field data.<\/p>\n<p>Schaetzl, R.J., Krist, F.J. Jr., and Miller, B.A. 2012. A Taxonomically Based, Ordinal Estimate of Soil Productivity for Landscape-Scale Analyses. <em data-start=\"2273\" data-end=\"2287\">Soil Science<\/em> 177:288\u2013299.<\/p>\n\n\t<\/div>\n<\/div>\n\n\n<div class=\"paragraph-widget paragraph-widget--text-html\"><div class=\"text-content\">\n<p><\/p>\n<\/div><\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"author":3216,"featured_media":11017,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"ngg_post_thumbnail":0,"footnotes":""},"categories":[304],"tags":[100,104,121,142],"class_list":["post-565","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-soil-interpretations-gis-data","tag-productivity-index","tag-raster","tag-soil-maps","tag-usa"],"acf":[],"featured_image_urls_v2":{"full":["https:\/\/www.agron.iastate.edu\/glsi\/files\/2014\/03\/The-soil-productivity-index.png",1066,530,false],"thumbnail":["https:\/\/www.agron.iastate.edu\/glsi\/files\/2014\/03\/The-soil-productivity-index-150x150.png",150,150,true],"medium":["https:\/\/www.agron.iastate.edu\/glsi\/files\/2014\/03\/The-soil-productivity-index-300x149.png",300,149,true],"medium_large":["https:\/\/www.agron.iastate.edu\/glsi\/files\/2014\/03\/The-soil-productivity-index-768x382.png",768,382,true],"large":["https:\/\/www.agron.iastate.edu\/glsi\/files\/2014\/03\/The-soil-productivity-index-1024x509.png",1024,509,true],"1536x1536":["https:\/\/www.agron.iastate.edu\/glsi\/files\/2014\/03\/The-soil-productivity-index.png",1066,530,false],"2048x2048":["https:\/\/www.agron.iastate.edu\/glsi\/files\/2014\/03\/The-soil-productivity-index.png",1066,530,false]},"post_excerpt_stackable_v2":"<p>The Productivity Index (PI) maps the inherent, long-term capacity of soils across the lower 48 states to support plant growth. It is an ordinal scale from 0 (least productive) to 19 (most productive) derived from family-level Soil Taxonomy attributes rather than short-term management effects. PI uses interpretations of taxonomic features that are consistently associated with lower or higher natural productivity and expresses them as a gridded surface for landscape analysis. Applied Relevance PI provides a stable, data-light indicator of potential productivity for regional planning, policy analysis, forestry and rangeland assessments, and ecological modeling. Because it reflects soil formation and morphology&hellip;<\/p>\n","category_list_v2":"<a href=\"https:\/\/www.agron.iastate.edu\/glsi\/category\/gis-data\/soil-interpretations-gis-data\/\" rel=\"category tag\">Soil Interpretations GIS Data<\/a>","author_info_v2":{"name":"Bradley Miller","url":"https:\/\/www.agron.iastate.edu\/glsi\/author\/millerba\/"},"comments_num_v2":"0 comments","yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Productivity Index Grid (conterminous U.S.) GIS Data - Geospatial Laboratory for Soil Informatics<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.agron.iastate.edu\/glsi\/gis-data\/soil-interpretations-gis-data\/productivity-index-grid-conterminous-us-gis-data\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" 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