{"id":245633,"date":"2017-08-29T14:51:53","date_gmt":"2017-08-29T17:51:53","guid":{"rendered":"http:\/\/revistapesquisa.fapesp.br\/?p=245633\/"},"modified":"2017-08-29T14:51:53","modified_gmt":"2017-08-29T17:51:53","slug":"more-nitrogen-in-crops","status":"publish","type":"post","link":"https:\/\/revistapesquisa.fapesp.br\/en\/more-nitrogen-in-crops\/","title":{"rendered":"More nitrogen in crops"},"content":{"rendered":"<div id=\"attachment_245634\" style=\"max-width: 310px\" class=\"wp-caption alignright\"><a href=\"http:\/\/revistapesquisa.fapesp.br\/wp-content\/uploads\/2017\/08\/012-017_notas_253-9.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-245634 size-medium\" src=\"http:\/\/revistapesquisa.fapesp.br\/wp-content\/uploads\/2017\/08\/012-017_notas_253-9-300x252.jpg\" alt=\"\" width=\"300\" height=\"252\" \/><p class=\"wp-caption-text\"><span class=\"media-credits-inline\">Ricardo Bortoletto-Santos<\/span><\/a> Polymer-coated urea (<em>in blue<\/em>) loses less nitrogen<span class=\"media-credits\">Ricardo Bortoletto-Santos<\/span><\/p><\/div>\n<p>Nitrogen is an essential nutrient for many crops, such as corn, wheat and coffee. Farmers supply it to plants by way of urea, a fertilizer that contains 43% to 46% nitrogen. The problem is that nitrogen volatilizes easily, losing up to 50% of its composition within 14 days of application. Researcher Ricardo Bortoletto Santos, a doctoral candidate at the S\u00e3o Carlos Chemistry Institute of the University of S\u00e3o Paulo (USP), is looking for a possible solution to that impediment: coating urea granules with a polymer. Conducting his research at Embrapa Instrumentation, also in S\u00e3o Carlos, on a team headed by materials engineer Cau\u00ea Ribeiro, Santos used a polyurethane made from two oils, castor and soybean, to coat the urea. \u201cWith a 7% polymeric coating (70 grams of polyurethane to one kilo of fertilizer), nitrogen losses dropped to 13% in laboratory tests, in 42 days,\u201d he says (<em>Journal of Applied Polymer Science, <\/em>September 2016).<\/p>\n","protected":false},"excerpt":{"rendered":"Polymer-coated urea loses less nitrogen","protected":false},"author":475,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[1651],"tags":[1637,259],"coauthors":[785],"class_list":["post-245633","post","type-post","status-publish","format-standard","hentry","category-notes","tag-agriculture","tag-chemistry"],"acf":[],"_links":{"self":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/posts\/245633","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/users\/475"}],"replies":[{"embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/comments?post=245633"}],"version-history":[{"count":0,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/posts\/245633\/revisions"}],"wp:attachment":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/media?parent=245633"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/categories?post=245633"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/tags?post=245633"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/coauthors?post=245633"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}