{"id":13649,"date":"2023-11-20T12:23:00","date_gmt":"2023-11-20T18:23:00","guid":{"rendered":"https:\/\/www.agron.iastate.edu\/glsi\/?p=13649"},"modified":"2025-09-20T20:18:00","modified_gmt":"2025-09-21T01:18:00","slug":"carbon-storage-in-cropland-soils-insights-from-iowa-united-states","status":"publish","type":"post","link":"https:\/\/www.agron.iastate.edu\/glsi\/manuscripts\/carbon-storage-in-cropland-soils-insights-from-iowa-united-states\/","title":{"rendered":"Carbon Storage in Cropland Soils: Insights from Iowa, United States"},"content":{"rendered":"<div class=\"paragraph-widget paragraph-widget--text-html\"><div class=\"text-content\">\n<p>The restoration of soil organic matter (SOM, as measured by soil organic carbon (SOC)) within the world\u2019s agricultural soils is imperative to sustaining crop production and restoring other ecosystem services. We compiled long-term studies on the effect of management practices on SOC from Iowa, USA\u2014an agricultural region with relatively high-quality soil data\u2014to highlight constraints on detecting changes in SOC and inform research needed to improve SOC measurement and management. We found that strip-tillage and no-tillage increased SOC by 0.25\u20130.43 Mg C ha\u22121 yr\u22121 compared to losses of 0.24 to 0.46 Mg C ha\u22121 yr\u22121 with more intensive tillage methods. The conversion of cropland to perennial grassland increased SOC by 0.21\u20130.74 Mg C ha\u22121 yr\u22121. However, diversifying crop rotations with extended rotations, and supplementing synthetic fertilizer with animal manure, had highly variable and inconsistent effects on SOC. The improved prediction of changes in SOC requires: the use of methods that can identify and disentangle multiple sources of variability; looking beyond total SOC and toward systematic collection of data on more responsive and functionally relevant fractions; whole-profile SOC monitoring; monitoring SOC in long-term studies on the effect of multiple conservation practices used in combination; and deeper collaboration between field soil scientists and modelers.<\/p>\n<\/div><\/div>\n\n<div class=\"paragraph-widget paragraph-widget--text-html\"><div class=\"text-content\">\n<p>Jordahl, J., M. McDaniel, B.A. Miller, M. Thompson, S. Villarino, and L.A. Schulte. 2023. Carbon storage in cropland soils: Insights from Iowa, United States. <a href=\"https:\/\/www.mdpi.com\/2073-445X\/12\/8\/1630\">Land 12(8):1630. doi: 10.3390\/land12081630<\/a>.<\/p>\n<\/div><\/div>\n\n<div class=\"paragraph-widget paragraph-widget--text-html\"><div class=\"text-content\">\n<p><\/p>\n<\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>The restoration of soil organic matter (SOM, as measured by soil organic carbon (SOC)) within the world\u2019s agricultural soils is imperative to sustaining crop production and restoring other ecosystem services. We compiled long-term studies on the effect of management practices on SOC from Iowa, USA\u2014an agricultural region with relatively high-quality soil data\u2014to highlight constraints on [&hellip;]<\/p>\n","protected":false},"author":3216,"featured_media":13650,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"ngg_post_thumbnail":0,"footnotes":""},"categories":[5,7],"tags":[19,60],"class_list":["post-13649","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-manuscripts","category-miller","tag-carbon","tag-iowa"],"acf":[],"featured_image_urls_v2":{"full":["https:\/\/www.agron.iastate.edu\/glsi\/files\/2025\/09\/Carbon-storage-in-cropland-soils.png",2428,1718,false],"thumbnail":["https:\/\/www.agron.iastate.edu\/glsi\/files\/2025\/09\/Carbon-storage-in-cropland-soils-150x150.png",150,150,true],"medium":["https:\/\/www.agron.iastate.edu\/glsi\/files\/2025\/09\/Carbon-storage-in-cropland-soils-300x212.png",300,212,true],"medium_large":["https:\/\/www.agron.iastate.edu\/glsi\/files\/2025\/09\/Carbon-storage-in-cropland-soils-768x543.png",768,543,true],"large":["https:\/\/www.agron.iastate.edu\/glsi\/files\/2025\/09\/Carbon-storage-in-cropland-soils-1024x725.png",1024,725,true],"1536x1536":["https:\/\/www.agron.iastate.edu\/glsi\/files\/2025\/09\/Carbon-storage-in-cropland-soils-1536x1087.png",1536,1087,true],"2048x2048":["https:\/\/www.agron.iastate.edu\/glsi\/files\/2025\/09\/Carbon-storage-in-cropland-soils-2048x1449.png",2048,1449,true]},"post_excerpt_stackable_v2":"<p>The restoration of soil organic matter (SOM, as measured by soil organic carbon (SOC)) within the world\u2019s agricultural soils is imperative to sustaining crop production and restoring other ecosystem services. We compiled long-term studies on the effect of management practices on SOC from Iowa, USA\u2014an agricultural region with relatively high-quality soil data\u2014to highlight constraints on detecting changes in SOC and inform research needed to improve SOC measurement and management. We found that strip-tillage and no-tillage increased SOC by 0.25\u20130.43 Mg C ha\u22121 yr\u22121 compared to losses of 0.24 to 0.46 Mg C ha\u22121 yr\u22121 with more intensive tillage methods. The&hellip;<\/p>\n","category_list_v2":"<a href=\"https:\/\/www.agron.iastate.edu\/glsi\/category\/manuscripts\/\" rel=\"category tag\">Manuscripts<\/a>, <a href=\"https:\/\/www.agron.iastate.edu\/glsi\/category\/miller\/\" rel=\"category tag\">Miller<\/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 v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Carbon Storage in Cropland Soils: Insights from Iowa, United States - Geospatial Laboratory for Soil Informatics<\/title>\n<meta name=\"description\" content=\"The restoration of soil organic matter (SOM, as measured by soil organic carbon (SOC)) within the world\u2019s agricultural soils is imperative to sustaining crop production and restoring other ecosystem services. We compiled long-term studies on the effect of management practices on SOC from Iowa, USA\u2014an agricultural region with relatively high-quality soil data\u2014to highlight constraints on detecting changes in SOC and inform research needed to improve SOC measurement and management.\" \/>\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\/manuscripts\/carbon-storage-in-cropland-soils-insights-from-iowa-united-states\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Carbon Storage in Cropland Soils: Insights from Iowa, United States - Geospatial Laboratory for Soil Informatics\" \/>\n<meta property=\"og:description\" content=\"The restoration of soil organic matter (SOM, as measured by soil organic carbon (SOC)) within the world\u2019s agricultural soils is imperative to sustaining crop production and restoring other ecosystem services. 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