{"id":6480,"date":"2022-12-12T12:24:12","date_gmt":"2022-12-12T18:24:12","guid":{"rendered":"https:\/\/www.agron.iastate.edu\/glsi\/?p=6480"},"modified":"2025-12-25T09:33:45","modified_gmt":"2025-12-25T15:33:45","slug":"iowa-average-corn-and-soybean-yields","status":"publish","type":"post","link":"https:\/\/www.agron.iastate.edu\/glsi\/cropping-systems\/iowa-average-corn-and-soybean-yields\/","title":{"rendered":"Corn and Soybean Yields in Iowa"},"content":{"rendered":"\n<div class=\"wp-block-stackable-image stk-block-image stk-block stk-1826e70\" data-block-id=\"1826e70\"><figure><span class=\"stk-img-wrapper stk-image--shape-stretch\"><img loading=\"lazy\" decoding=\"async\" class=\"stk-img wp-image-14548\" src=\"https:\/\/www.agron.iastate.edu\/glsi\/files\/2022\/12\/IA-Corn-and-Soybean-Yields.png\" width=\"1296\" height=\"900\" alt=\"The image is a line graph titled \u201cIowa\u2019s Mean Corn and Soybean Yields\u201d showing long-term yield trends from 1925 to 2025. The x-axis represents year, and the y-axis shows yield in bushels per acre. Two lines are plotted: corn yields (orange) and soybean yields (green). Both crops show a strong upward trend over time, with corn increasing from roughly 35\u201345 bu\/ac in the 1920s\u20131930s to over 200 bu\/ac in recent years, and soybeans rising from about 12\u201318 bu\/ac to around 60\u201365 bu\/ac. The graph also shows year-to-year variability, including noticeable dips likely associated with adverse weather or other stress events, especially for corn. Iowa State University Department of Agronomy and the Geospatial Laboratory for Soil Informatics are credited, with data sourced from USDA-NASS and preparation credited to Bradley Miller.\" srcset=\"https:\/\/www.agron.iastate.edu\/glsi\/files\/2022\/12\/IA-Corn-and-Soybean-Yields.png 1296w, https:\/\/www.agron.iastate.edu\/glsi\/files\/2022\/12\/IA-Corn-and-Soybean-Yields-300x208.png 300w, https:\/\/www.agron.iastate.edu\/glsi\/files\/2022\/12\/IA-Corn-and-Soybean-Yields-1024x711.png 1024w, https:\/\/www.agron.iastate.edu\/glsi\/files\/2022\/12\/IA-Corn-and-Soybean-Yields-768x533.png 768w\" sizes=\"auto, (max-width: 1296px) 100vw, 1296px\" \/><\/span><\/figure><\/div>\n\n\n<div class=\"paragraph-widget paragraph-widget--text-html\"><div class=\"text-content\">\n<p>This graph places Iowa\u2019s crop productivity in a historical and agronomic context. The steady upward trends in both corn and soybean yields reflect nearly a century of advances in plant breeding, genetics (including hybrids and GM traits), fertilizer management, mechanization, pest control, and improved agronomic practices, along with enhanced soil drainage and data-driven management. Corn shows a steeper yield increase than soybeans, consistent with greater genetic gain. The pronounced year-to-year variability &#8211; especially sharp yield dips &#8211; highlights the influence of weather extremes (e.g., droughts, floods, heat stress) and other episodic stresses, even as long-term productivity rises. Together, the trends illustrate how Iowa\u2019s highly productive agricultural system has intensified over time while remaining sensitive to climate variability. This history should be used in discussions of yield trends, resilience, and sustainability in Midwestern row-crop agriculture.<\/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>This graph places Iowa\u2019s crop productivity in a historical and agronomic context. The steady upward trends in both corn and soybean yields reflect nearly a century of advances in plant breeding, genetics (including hybrids and GM traits), fertilizer management, mechanization, pest control, and improved agronomic practices, along with enhanced soil drainage and data-driven management. Corn [&hellip;]<\/p>\n","protected":false},"author":3216,"featured_media":14548,"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":[339],"tags":[27,53],"class_list":["post-6480","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cropping-systems","tag-crop-yield","tag-history"],"acf":[],"featured_image_urls_v2":{"full":["https:\/\/www.agron.iastate.edu\/glsi\/files\/2022\/12\/IA-Corn-and-Soybean-Yields.png",1296,900,false],"thumbnail":["https:\/\/www.agron.iastate.edu\/glsi\/files\/2022\/12\/IA-Corn-and-Soybean-Yields-150x150.png",150,150,true],"medium":["https:\/\/www.agron.iastate.edu\/glsi\/files\/2022\/12\/IA-Corn-and-Soybean-Yields-300x208.png",300,208,true],"medium_large":["https:\/\/www.agron.iastate.edu\/glsi\/files\/2022\/12\/IA-Corn-and-Soybean-Yields-768x533.png",768,533,true],"large":["https:\/\/www.agron.iastate.edu\/glsi\/files\/2022\/12\/IA-Corn-and-Soybean-Yields-1024x711.png",1024,711,true],"1536x1536":["https:\/\/www.agron.iastate.edu\/glsi\/files\/2022\/12\/IA-Corn-and-Soybean-Yields.png",1296,900,false],"2048x2048":["https:\/\/www.agron.iastate.edu\/glsi\/files\/2022\/12\/IA-Corn-and-Soybean-Yields.png",1296,900,false]},"post_excerpt_stackable_v2":"<p>This graph places Iowa\u2019s crop productivity in a historical and agronomic context. The steady upward trends in both corn and soybean yields reflect nearly a century of advances in plant breeding, genetics (including hybrids and GM traits), fertilizer management, mechanization, pest control, and improved agronomic practices, along with enhanced soil drainage and data-driven management. Corn shows a steeper yield increase than soybeans, consistent with greater genetic gain. The pronounced year-to-year variability &#8211; especially sharp yield dips &#8211; highlights the influence of weather extremes (e.g., droughts, floods, heat stress) and other episodic stresses, even as long-term productivity rises. Together, the trends&hellip;<\/p>\n","category_list_v2":"<a href=\"https:\/\/www.agron.iastate.edu\/glsi\/category\/cropping-systems\/\" rel=\"category tag\">Cropping Systems<\/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>Corn and Soybean Yields in Iowa - Geospatial Laboratory for Soil Informatics<\/title>\n<meta name=\"description\" content=\"Explore Iowa&#039;s average corn and soybean yields, offering insights into crop performance and agricultural productivity trends that impact the state&#039;s farming practices.\" \/>\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\/cropping-systems\/iowa-average-corn-and-soybean-yields\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Corn and Soybean Yields in Iowa - Geospatial Laboratory for Soil Informatics\" \/>\n<meta property=\"og:description\" content=\"Explore Iowa&#039;s average corn and soybean yields, offering insights into crop performance and agricultural productivity trends that impact the state&#039;s farming practices.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.agron.iastate.edu\/glsi\/cropping-systems\/iowa-average-corn-and-soybean-yields\/\" \/>\n<meta property=\"og:site_name\" content=\"Geospatial Laboratory for Soil Informatics\" \/>\n<meta property=\"article:published_time\" content=\"2022-12-12T18:24:12+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-12-25T15:33:45+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.agron.iastate.edu\/glsi\/files\/2022\/12\/IA-Corn-and-Soybean-Yields.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1296\" \/>\n\t<meta property=\"og:image:height\" content=\"900\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Bradley Miller\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Bradley Miller\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.agron.iastate.edu\\\/glsi\\\/cropping-systems\\\/iowa-average-corn-and-soybean-yields\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.agron.iastate.edu\\\/glsi\\\/cropping-systems\\\/iowa-average-corn-and-soybean-yields\\\/\"},\"author\":{\"name\":\"Bradley Miller\",\"@id\":\"https:\\\/\\\/www.agron.iastate.edu\\\/glsi\\\/#\\\/schema\\\/person\\\/a96fa0c818314fce5f3928c232490277\"},\"headline\":\"Corn and Soybean Yields in Iowa\",\"datePublished\":\"2022-12-12T18:24:12+00:00\",\"dateModified\":\"2025-12-25T15:33:45+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.agron.iastate.edu\\\/glsi\\\/cropping-systems\\\/iowa-average-corn-and-soybean-yields\\\/\"},\"wordCount\":143,\"publisher\":{\"@id\":\"https:\\\/\\\/www.agron.iastate.edu\\\/glsi\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.agron.iastate.edu\\\/glsi\\\/cropping-systems\\\/iowa-average-corn-and-soybean-yields\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.agron.iastate.edu\\\/glsi\\\/files\\\/2022\\\/12\\\/IA-Corn-and-Soybean-Yields.png\",\"keywords\":[\"crop yield\",\"history\"],\"articleSection\":[\"Cropping Systems\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.agron.iastate.edu\\\/glsi\\\/cropping-systems\\\/iowa-average-corn-and-soybean-yields\\\/\",\"url\":\"https:\\\/\\\/www.agron.iastate.edu\\\/glsi\\\/cropping-systems\\\/iowa-average-corn-and-soybean-yields\\\/\",\"name\":\"Corn and Soybean Yields in Iowa - 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The x-axis represents year, and the y-axis shows yield in bushels per acre. Two lines are plotted: corn yields (orange) and soybean yields (green). Both crops show a strong upward trend over time, with corn increasing from roughly 35\u201345 bu\/ac in the 1920s\u20131930s to over 200 bu\/ac in recent years, and soybeans rising from about 12\u201318 bu\/ac to around 60\u201365 bu\/ac. The graph also shows year-to-year variability, including noticeable dips likely associated with adverse weather or other stress events, especially for corn. Iowa State University Department of Agronomy and the Geospatial Laboratory for Soil Informatics are credited, with data sourced from USDA-NASS and preparation credited to Bradley Miller."},{"@type":"BreadcrumbList","@id":"https:\/\/www.agron.iastate.edu\/glsi\/cropping-systems\/iowa-average-corn-and-soybean-yields\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.agron.iastate.edu\/glsi\/"},{"@type":"ListItem","position":2,"name":"Corn and Soybean Yields in Iowa"}]},{"@type":"WebSite","@id":"https:\/\/www.agron.iastate.edu\/glsi\/#website","url":"https:\/\/www.agron.iastate.edu\/glsi\/","name":"Geospatial Laboratory for Soil Informatics","description":"Soil Mapping Research at Iowa State University","publisher":{"@id":"https:\/\/www.agron.iastate.edu\/glsi\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.agron.iastate.edu\/glsi\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.agron.iastate.edu\/glsi\/#organization","name":"Geospatial Laboratory of Soil Informatics","url":"https:\/\/www.agron.iastate.edu\/glsi\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.agron.iastate.edu\/glsi\/#\/schema\/logo\/image\/","url":"https:\/\/www.agron.iastate.edu\/glsi\/files\/2019\/06\/favicon.ico","contentUrl":"https:\/\/www.agron.iastate.edu\/glsi\/files\/2019\/06\/favicon.ico","width":16,"height":16,"caption":"Geospatial Laboratory of Soil Informatics"},"image":{"@id":"https:\/\/www.agron.iastate.edu\/glsi\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/www.agron.iastate.edu\/glsi\/#\/schema\/person\/a96fa0c818314fce5f3928c232490277","name":"Bradley Miller","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/743e78561251313585ddf27fc4aa4b4d9e076967d63702712d0794a7f92f2418?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/743e78561251313585ddf27fc4aa4b4d9e076967d63702712d0794a7f92f2418?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/743e78561251313585ddf27fc4aa4b4d9e076967d63702712d0794a7f92f2418?s=96&d=mm&r=g","caption":"Bradley Miller"},"url":"https:\/\/www.agron.iastate.edu\/glsi\/author\/millerba\/"}]}},"_links":{"self":[{"href":"https:\/\/www.agron.iastate.edu\/glsi\/wp-json\/wp\/v2\/posts\/6480","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.agron.iastate.edu\/glsi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.agron.iastate.edu\/glsi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.agron.iastate.edu\/glsi\/wp-json\/wp\/v2\/users\/3216"}],"replies":[{"embeddable":true,"href":"https:\/\/www.agron.iastate.edu\/glsi\/wp-json\/wp\/v2\/comments?post=6480"}],"version-history":[{"count":10,"href":"https:\/\/www.agron.iastate.edu\/glsi\/wp-json\/wp\/v2\/posts\/6480\/revisions"}],"predecessor-version":[{"id":14612,"href":"https:\/\/www.agron.iastate.edu\/glsi\/wp-json\/wp\/v2\/posts\/6480\/revisions\/14612"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.agron.iastate.edu\/glsi\/wp-json\/wp\/v2\/media\/14548"}],"wp:attachment":[{"href":"https:\/\/www.agron.iastate.edu\/glsi\/wp-json\/wp\/v2\/media?parent=6480"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.agron.iastate.edu\/glsi\/wp-json\/wp\/v2\/categories?post=6480"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.agron.iastate.edu\/glsi\/wp-json\/wp\/v2\/tags?post=6480"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}