{"id":888,"date":"2017-11-22T22:51:20","date_gmt":"2017-11-22T21:51:20","guid":{"rendered":"https:\/\/bodemplant.nl\/?p=888"},"modified":"2017-12-07T10:42:28","modified_gmt":"2017-12-07T09:42:28","slug":"humuszuren-getest-3-jarige-potproef","status":"publish","type":"post","link":"https:\/\/bodemplant.nl\/en\/2017\/11\/22\/humuszuren-getest-3-jarige-potproef\/","title":{"rendered":"Humic acids tested in a 3-yr pot experiment"},"content":{"rendered":"<p>Humic acids are increasingly popular as soil conditioner. While many short-duration experiments have been done (see my <a href=\"https:\/\/bodemplant.nl\/en\/2017\/11\/07\/meta-review-humuszuren\/\">earlier item<\/a>), Ciarkowska and colleagues published about long-term effects. In a pot experiment the growth of celery (2 crops) and leeks (1 crop) was followed after one application of the commercially available Base Actosol\u00ae at the onset of the experiment. Humic acid at a rate of 6.2 g per 5-kg pot was applied in the form of Base Actosol\u00ae. This was compared with the application of farm-yard manure in an amount that lead to a similar dose of humic acids, and a control and a NPK-artificial fertilizer treatment. An additional treatment was a double dose of Base Actosol\u00ae. The total amount of N, P and K was made equal in all treatments except the control by amending additional amounts of artificial fertilizer. The experiment was carried out using a loamy sand and a clay loam, both with an organic matter content of about 1.7% and a pH between 5.1 and 5.4.<\/p>\n<p>Base Actosol\u00ae increased the average shoot and root growth significantly compared to all treatments except the root growth on the loamy sand. The increase in C and dehydrogenase content was comparable with that of the farm-yard manure application. So, Base Actosol\u00ae had equal to better effects than farm-yard manure while much less amounts of it are needed.<\/p>\n<p style=\"padding-left: 30px;\"><em><strong>comments:<\/strong> Although the applied 6.2 g humic acid to 5 kg soil seems to be a small amount, applied to the top 0-20 cm layer of 1 ha this would amount 49.6 tons of Base Actosol\u00ae. So the question is if this is economically feasible. (Calculation: Base Actosol\u00ae contains 6% humic acids; an application of 6.2 g humic acid per 5 kg equals an application of 103.3 g of Base Actosol, which equals 20.67 g per kg soil. Assuming that the top 0-20 cm layer of one hectare with a bulk density of 1.2 g\/cm<sup>3<\/sup> weighs 2.4 Mkg, 49.6 tons of Base Actosol\u00ae would be needed.)<\/em><\/p>\n<p>Ciarkowska et al. (2017) in Geoderma, <a href=\"http:\/\/dx.doi.org\/10.1016\/j.geoderma.2017.05.022\">http:\/\/dx.doi.org\/10.1016\/j.geoderma.2017.05.022<\/a><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Humic acids are increasingly popular as soil conditioner. While many short-duration experiments have been done (see my earlier item), Ciarkowska&#8230;<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13,22],"tags":[],"class_list":["post-888","post","type-post","status-publish","format-standard","hentry","category-biostimulantia","category-humuszuren"],"translation":{"provider":"WPGlobus","version":"3.0.2","language":"en","enabled_languages":["nl","en"],"languages":{"nl":{"title":true,"content":true,"excerpt":false},"en":{"title":true,"content":true,"excerpt":false}}},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Aad Termorshuizen Consultancy - News: humic acids tested<\/title>\n<meta name=\"description\" content=\"Short summary of a publication presenting the results on a 3-yr-experiment investigating the effects of humic acids\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/bodemplant.nl\/2017\/11\/22\/humuszuren-getest-3-jarige-potproef\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Aad Termorshuizen Consultancy - News: humic acids tested\" \/>\n<meta property=\"og:description\" content=\"Short summary of a publication presenting the results on a 3-yr-experiment investigating the effects of humic acids\" \/>\n<meta property=\"og:url\" content=\"https:\/\/bodemplant.nl\/2017\/11\/22\/humuszuren-getest-3-jarige-potproef\/\" \/>\n<meta property=\"og:site_name\" content=\"Soilcrop\" \/>\n<meta property=\"article:published_time\" content=\"2017-11-22T21:51:20+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2017-12-07T09:42:28+00:00\" \/>\n<meta name=\"author\" content=\"Aad Termorshuizen\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Aad Termorshuizen\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/bodemplant.nl\/2017\/11\/22\/humuszuren-getest-3-jarige-potproef\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/bodemplant.nl\/2017\/11\/22\/humuszuren-getest-3-jarige-potproef\/\"},\"author\":{\"name\":\"Aad Termorshuizen\",\"@id\":\"https:\/\/bodemplant.nl\/#\/schema\/person\/2f14ebc477530761e0b06bdd402eb1ec\"},\"headline\":\"Humic acids tested in a 3-yr pot experiment\",\"datePublished\":\"2017-11-22T21:51:20+00:00\",\"dateModified\":\"2017-12-07T09:42:28+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/bodemplant.nl\/2017\/11\/22\/humuszuren-getest-3-jarige-potproef\/\"},\"wordCount\":672,\"commentCount\":0,\"articleSection\":[\"Biostimulantia\",\"Humic acids\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/bodemplant.nl\/2017\/11\/22\/humuszuren-getest-3-jarige-potproef\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/bodemplant.nl\/2017\/11\/22\/humuszuren-getest-3-jarige-potproef\/\",\"url\":\"https:\/\/bodemplant.nl\/2017\/11\/22\/humuszuren-getest-3-jarige-potproef\/\",\"name\":\"Aad Termorshuizen Consultancy - nieuws: humuszuren getest\",\"isPartOf\":{\"@id\":\"https:\/\/bodemplant.nl\/#website\"},\"datePublished\":\"2017-11-22T21:51:20+00:00\",\"dateModified\":\"2017-12-07T09:42:28+00:00\",\"author\":{\"@id\":\"https:\/\/bodemplant.nl\/#\/schema\/person\/2f14ebc477530761e0b06bdd402eb1ec\"},\"description\":\"Short summary of a publication presenting the results on a 3-yr-experiment investigating the effects of humic acids\",\"breadcrumb\":{\"@id\":\"https:\/\/bodemplant.nl\/2017\/11\/22\/humuszuren-getest-3-jarige-potproef\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/bodemplant.nl\/2017\/11\/22\/humuszuren-getest-3-jarige-potproef\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/bodemplant.nl\/2017\/11\/22\/humuszuren-getest-3-jarige-potproef\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/bodemplant.nl\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Humuszuren getest in een 3-jarige potproef\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/bodemplant.nl\/#website\",\"url\":\"https:\/\/bodemplant.nl\/\",\"name\":\"Soilcrop\",\"description\":\"Aad Termorshuizen Consultancy Soil Quality &amp; 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