{"id":387,"date":"2018-04-09T07:12:13","date_gmt":"2018-04-09T15:12:13","guid":{"rendered":"http:\/\/blogs.cdfa.ca.gov\/FREP\/?p=387"},"modified":"2020-02-18T08:52:10","modified_gmt":"2020-02-18T16:52:10","slug":"research-update-california-fertilization-guidelines","status":"publish","type":"post","link":"https:\/\/blogs.cdfa.ca.gov\/FREP\/index.php\/research-update-california-fertilization-guidelines\/","title":{"rendered":"Research Update: California Fertilization Guidelines"},"content":{"rendered":"<p style=\"text-align: left;\"><strong>Research Project:&nbsp;<\/strong><a href=\"https:\/\/apps1.cdfa.ca.gov\/fertilizerresearch\/docs\/guidelines.html\" target=\"_blank\" rel=\"noopener noreferrer\">Online Fertilization Guidelines<\/a> for Agricultural Crops in California<\/p>\n<p><strong>Project Leaders: <\/strong>Daniel Geisseler (CE Nutrient Management Specialist) and William Horwath (Professor), Department of Land Air and Water Resources, University of California, Davis.<br \/>\n<strong>Project Status: <\/strong>Completed<br \/>\n<strong>Project Location: <\/strong>Statewide<!--more--><\/p>\n<p><strong>Issue: <\/strong>California grows over 400 commodities that account for one-third of the country\u2019s vegetable production and two-thirds of the country\u2019s fruit and nut production. For many of these crops, there are various research and technical articles available that provide fertilization information. However, this information is often hard to find and can take hours of searching the web. California needed a comprehensive overview of current research-based knowledge of crop fertilization. The Fertilization Guidelines have addressed this need by providing a summary of relevant nutrient management research on major California crops.<\/p>\n<p><strong>Findings: <\/strong><a href=\"https:\/\/apps1.cdfa.ca.gov\/fertilizerresearch\/docs\/guidelines.html\" target=\"_blank\" rel=\"noopener noreferrer\">California Fertilization Guidelines<\/a> Guidelines were first published in the summer of 2013 and covered 16 crops. This project expanded the Guidelines to cover an additional 12 crops (see below). Nutrient management quizzes, for many of the crops, have also been added to the website.<\/p>\n<p><a href=\"https:\/\/apps1.cdfa.ca.gov\/fertilizerresearch\/docs\/guidelines.html\"><img loading=\"lazy\" decoding=\"async\" data-attachment-id=\"560\" data-permalink=\"https:\/\/blogs.cdfa.ca.gov\/FREP\/index.php\/research-update-california-fertilization-guidelines\/guidelines\/\" data-orig-file=\"https:\/\/blogs.cdfa.ca.gov\/FREP\/wp-content\/uploads\/2018\/02\/guidelines.png\" data-orig-size=\"565,266\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"guidelines\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/blogs.cdfa.ca.gov\/FREP\/wp-content\/uploads\/2018\/02\/guidelines.png\" class=\"alignnone size-full wp-image-560\" src=\"http:\/\/blogs.cdfa.ca.gov\/FREP\/wp-content\/uploads\/2018\/02\/guidelines.png\" alt=\"Screenshot of fertilizer guidelines web site\" width=\"565\" height=\"266\" srcset=\"https:\/\/blogs.cdfa.ca.gov\/FREP\/wp-content\/uploads\/2018\/02\/guidelines.png 565w, https:\/\/blogs.cdfa.ca.gov\/FREP\/wp-content\/uploads\/2018\/02\/guidelines-300x141.png 300w\" sizes=\"auto, (max-width: 565px) 100vw, 565px\" \/><\/a><\/p>\n<p><strong>Potential Impact: <\/strong>The California Fertilization Guidelines provide growers and crop advisors with an important decision-making tool to help determine the right time, place, rate and source of fertilizers without compromising crop yield. With the addition of these 12 crops, the guidelines now provide nitrogen, phosphorus and potassium fertilization information for 28 crops covering 75 percent of irrigated agriculture in California.<\/p>\n<p><strong>Additional Resources: <\/strong>FREP publishes nitrogen management brochures based on these guidelines. If you would like to make specific crop brochures available at your next event or wish to hand them out to clients, customers or workers, high-quality PDFs and a limited number of printed brochures are available from FREP upon request. PDFs of the brochures are available on the FREP <a href=\"https:\/\/www.cdfa.ca.gov\/is\/ffldrs\/frep\/Resources.html\">Resources page<\/a>.<\/p>\n<p><strong>Guidelines website<\/strong>: <a href=\"http:\/\/www.cdfa.ca.gov\/go\/FREPguide\">www.cdfa.ca.gov\/go\/FREPguide<\/a><\/p>\n<p><strong>Final Report:<\/strong> <a href=\"https:\/\/www.cdfa.ca.gov\/is\/ffldrs\/frep\/pdfs\/CompletedProjects\/15-0231Geisseler2015.pdf\">https:\/\/www.cdfa.ca.gov\/is\/ffldrs\/frep\/pdfs\/CompletedProjects\/15-0231Geisseler2015.pdf<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Research Project:&nbsp;Online Fertilization Guidelines for Agricultural Crops in California Project Leaders: Daniel Geisseler (CE Nutrient Management Specialist) and William Horwath (Professor), Department of Land Air and Water Resources, University of California, Davis. Project Status: Completed Project Location: Statewide<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_EventAllDay":false,"_EventTimezone":"","_EventStartDate":"","_EventEndDate":"","_EventStartDateUTC":"","_EventEndDateUTC":"","_EventShowMap":false,"_EventShowMapLink":false,"_EventURL":"","_EventCost":"","_EventCostDescription":"","_EventCurrencySymbol":"","_EventCurrencyCode":"","_EventCurrencyPosition":"","_EventDateTimeSeparator":"","_EventTimeRangeSeparator":"","_EventOrganizerID":[],"_EventVenueID":[],"_OrganizerEmail":"","_OrganizerPhone":"","_OrganizerWebsite":"","_VenueAddress":"","_VenueCity":"","_VenueCountry":"","_VenueProvince":"","_VenueState":"","_VenueZip":"","_VenuePhone":"","_VenueURL":"","_VenueStateProvince":"","_VenueLat":"","_VenueLng":"","_VenueShowMap":false,"_VenueShowMapLink":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[86],"tags":[],"class_list":["post-387","post","type-post","status-publish","format-standard","hentry","category-all"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p9r16A-6f","jetpack-related-posts":[{"id":79,"url":"https:\/\/blogs.cdfa.ca.gov\/FREP\/index.php\/california-fertilization-guidelines-and-brochures\/","url_meta":{"origin":387,"position":0},"title":"California Fertilization Guidelines and Brochures","author":"Brooke Elliot","date":"January 21, 2016","format":false,"excerpt":"The California Fertilization Guidelines on the FREP website have been expanded to include recommendations for 18 crops, representing more than half of the irrigated agriculture in California. The recent additional recommendations are for plums, peaches and nectarines. Potato recommendations are coming soon. Additionally, FREP is pleased to announce that tomato,\u2026","rel":"","context":"In &quot;Other&quot;","block_context":{"text":"Other","link":"https:\/\/blogs.cdfa.ca.gov\/FREP\/index.php\/category\/other\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/blogs.cdfa.ca.gov\/FREP\/wp-content\/uploads\/2016\/01\/Brochures21.gif?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/blogs.cdfa.ca.gov\/FREP\/wp-content\/uploads\/2016\/01\/Brochures21.gif?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/blogs.cdfa.ca.gov\/FREP\/wp-content\/uploads\/2016\/01\/Brochures21.gif?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/blogs.cdfa.ca.gov\/FREP\/wp-content\/uploads\/2016\/01\/Brochures21.gif?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":334,"url":"https:\/\/blogs.cdfa.ca.gov\/FREP\/index.php\/grants-to-begin-funding-january-2018\/","url_meta":{"origin":387,"position":1},"title":"Grants to Begin Funding January 2018","author":"Brooke Elliot","date":"January 2, 2018","format":false,"excerpt":"The Fertilizer Research and Education Program (FREP) of the California Department of Food and Agriculture (CDFA) is pleased to announce the award of almost $800,000 in grant funds to agricultural organizations and universities this year. These grants will fund four projects that will improve the efficiency and reduce the environmental\u2026","rel":"","context":"In &quot;FREP Grant Program&quot;","block_context":{"text":"FREP Grant Program","link":"https:\/\/blogs.cdfa.ca.gov\/FREP\/index.php\/category\/frep-grant-program\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":849,"url":"https:\/\/blogs.cdfa.ca.gov\/FREP\/index.php\/registration-now-open-for-the-frepwpha-conference-on-october-22-24-2018\/","url_meta":{"origin":387,"position":2},"title":"Registration Now Open for the FREP\/WPHA Conference on October 22-24, 2018","author":"Brooke Elliot","date":"August 23, 2018","format":false,"excerpt":"The California Department of Food and Agriculture\u2019s (CDFA) Fertilizer Research and Education Program (FREP) and the Western Plant Health Association (WPHA) will host the 26th annual nutrient management conference at the Embassy Suites Hotel in Seaside, California, on October 23-24. The event also includes a pre-conference farm tour on October\u2026","rel":"","context":"In &quot;Nutrient Management Events&quot;","block_context":{"text":"Nutrient Management Events","link":"https:\/\/blogs.cdfa.ca.gov\/FREP\/index.php\/category\/nutrient-management-events\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/blogs.cdfa.ca.gov\/FREP\/wp-content\/uploads\/2018\/08\/Conf-Page-Banner-2018-1024x330.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/blogs.cdfa.ca.gov\/FREP\/wp-content\/uploads\/2018\/08\/Conf-Page-Banner-2018-1024x330.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/blogs.cdfa.ca.gov\/FREP\/wp-content\/uploads\/2018\/08\/Conf-Page-Banner-2018-1024x330.jpg?resize=525%2C300 1.5x"},"classes":[]},{"id":189,"url":"https:\/\/blogs.cdfa.ca.gov\/FREP\/index.php\/research-update-fertilizer-value-of-nitrogen-in-irrigation-water\/","url_meta":{"origin":387,"position":3},"title":"Research Update: Fertilizer Value of Nitrogen in Irrigation Water","author":"Brooke Elliot","date":"February 15, 2017","format":false,"excerpt":"Research Project: Determining the Fertilizer Value of Ambient Nitrogen in Irrigation Water - Cahn, M. et al. Status: Final year of study Issue: Irrigation water from many wells on the Central Coast contains a significant amount of nitrate-nitrogen (NO3-N). The N content in irrigation water has not been accounted for\u2026","rel":"","context":"In &quot;All&quot;","block_context":{"text":"All","link":"https:\/\/blogs.cdfa.ca.gov\/FREP\/index.php\/category\/all\/"},"img":{"alt_text":"Manifold and injection system used for simulating irrigation water with different concentrations of nitrate-N.","src":"https:\/\/i0.wp.com\/blogs.cdfa.ca.gov\/FREP\/wp-content\/uploads\/2016\/12\/Cahn-blog-300x200.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":139,"url":"https:\/\/blogs.cdfa.ca.gov\/FREP\/index.php\/key-learnings-from-the-frepwpha-conference\/","url_meta":{"origin":387,"position":4},"title":"Key Learnings from the FREP\/WPHA Conference","author":"Brooke Elliot","date":"November 30, 2016","format":false,"excerpt":"The twenty fourth annual FREP\/WPHA Conference took place on October 26-27, where speakers from industry, academia, and agricultural consulting provided cutting edge information on nutrient management in California agriculture. The conference presentations covered a wide range of nutrient management topics including education and outreach, soil microbiology, government regulations and irrigation,\u2026","rel":"","context":"In &quot;Nutrient Management Events&quot;","block_context":{"text":"Nutrient Management Events","link":"https:\/\/blogs.cdfa.ca.gov\/FREP\/index.php\/category\/nutrient-management-events\/"},"img":{"alt_text":"Conf-Key-Learnings-Banner","src":"https:\/\/i0.wp.com\/blogs.cdfa.ca.gov\/FREP\/wp-content\/uploads\/2016\/11\/Conf-Key-Learnings-Banner-1024x330.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/blogs.cdfa.ca.gov\/FREP\/wp-content\/uploads\/2016\/11\/Conf-Key-Learnings-Banner-1024x330.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/blogs.cdfa.ca.gov\/FREP\/wp-content\/uploads\/2016\/11\/Conf-Key-Learnings-Banner-1024x330.jpg?resize=525%2C300 1.5x"},"classes":[]},{"id":1252,"url":"https:\/\/blogs.cdfa.ca.gov\/FREP\/index.php\/nitrate-quick-test\/","url_meta":{"origin":387,"position":5},"title":"Nitrate Quick Test","author":"Brooke Elliot","date":"June 25, 2019","format":false,"excerpt":"The nitrate quick test (NQT) is a cost-effective tool that can be used in nutrient management planning to determine the residual soil nitrate concentration. The results from the test can be used to improve fertilizer management and assist growers in accurately meeting crop needs. Here is an outline of the\u2026","rel":"","context":"In &quot;Instructions&quot;","block_context":{"text":"Instructions","link":"https:\/\/blogs.cdfa.ca.gov\/FREP\/index.php\/category\/instructions\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/blogs.cdfa.ca.gov\/FREP\/wp-content\/uploads\/2019\/06\/NQT-infographic.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/blogs.cdfa.ca.gov\/FREP\/wp-content\/uploads\/2019\/06\/NQT-infographic.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/blogs.cdfa.ca.gov\/FREP\/wp-content\/uploads\/2019\/06\/NQT-infographic.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/blogs.cdfa.ca.gov\/FREP\/wp-content\/uploads\/2019\/06\/NQT-infographic.png?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/blogs.cdfa.ca.gov\/FREP\/wp-content\/uploads\/2019\/06\/NQT-infographic.png?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/blogs.cdfa.ca.gov\/FREP\/wp-content\/uploads\/2019\/06\/NQT-infographic.png?resize=1400%2C800&ssl=1 4x"},"classes":[]}],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/blogs.cdfa.ca.gov\/FREP\/index.php\/wp-json\/wp\/v2\/posts\/387","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.cdfa.ca.gov\/FREP\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.cdfa.ca.gov\/FREP\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.cdfa.ca.gov\/FREP\/index.php\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.cdfa.ca.gov\/FREP\/index.php\/wp-json\/wp\/v2\/comments?post=387"}],"version-history":[{"count":7,"href":"https:\/\/blogs.cdfa.ca.gov\/FREP\/index.php\/wp-json\/wp\/v2\/posts\/387\/revisions"}],"predecessor-version":[{"id":1534,"href":"https:\/\/blogs.cdfa.ca.gov\/FREP\/index.php\/wp-json\/wp\/v2\/posts\/387\/revisions\/1534"}],"wp:attachment":[{"href":"https:\/\/blogs.cdfa.ca.gov\/FREP\/index.php\/wp-json\/wp\/v2\/media?parent=387"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.cdfa.ca.gov\/FREP\/index.php\/wp-json\/wp\/v2\/categories?post=387"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.cdfa.ca.gov\/FREP\/index.php\/wp-json\/wp\/v2\/tags?post=387"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}