{"id":2648,"date":"2020-08-31T11:16:10","date_gmt":"2020-08-31T11:16:10","guid":{"rendered":"http:\/\/agri-research-journal.net\/SjarEn\/?p=2648"},"modified":"2020-08-31T11:16:10","modified_gmt":"2020-08-31T11:16:10","slug":"effect-of-various-sources-of-humic-substances-on-soluble-%e2%80%8ecalcium-and-available-phosphorus-of-two-calcareous-soils","status":"publish","type":"post","link":"https:\/\/agri-research-journal.net\/SjarEn\/?p=2648","title":{"rendered":"Effect of Various Sources of Humic Substances on Soluble \u200eCalcium and Available Phosphorus of Two Calcareous Soils"},"content":{"rendered":"\n

Jamal H. Yaqoub*(1) <\/sup>andMohammed\nA. budalkareem(2)<\/sup><\/strong><\/p>\n\n\n\n

(1). University Services Management\nAdministration, University of Basrah, Iraq.          (2). Department of Soil Sciences,\nWater Research, Faculty of Agriculture, University of Basrah, Iraq.    <\/p>\n\n\n\n

(*Corresponding author: Jamal H. Yaqoub  E-Mail: jam13336@Gmail.com<\/a>).<\/p>\n\n\n\n

Received: 28\/05\/2020                               Accepted:\n13\/06\/2020<\/p>\n\n\n\n

Abstract<\/strong><\/p>\n\n\n\n

An incubation experiment was laid out at Department of Soil Sciences and\nWater Resources, College of Agriculture, University of Basrah, Iraq, in 2019,\nto study the effect of humic substances (humic acid and fulvic acid) which\nextracted from different organic sources (rice straw, corn cobs, cattlle\nresidue and poultry residue) composed aerobically for three months on\nphosphorus availability as related to calcium concentration in solution of two\nsoils. Four levels of humic substances (0, 20, 40 and 60 L\/ha) were applied to\ntwo soils along with 0, 50, 100 and 150 kg P2<\/sub>O5<\/sub> \/ha from\neither triple super phosphate or di-ammonium phosphate. Samples were incubated\nat 25 \u00b1 2 \u00b0C for 14 days under field capacity moisture condition. Soluble\ncalcium was determined and available P was determined after extracting by 0.5 M<\/em>\nNaHCO3<\/sub>. In respect of soluble Ca, the result showed that increasing\nhumic substances level decreased soluble Ca++<\/sup> at both soils and both\nfertilizers used, with lowest values in the treatments of  rice straw and poultry residue. Furthermore,TSP\ngave the highest values of soluble calcium as compared with DAP. Available P\nshowed opposite trends as for available calcium. Available P values were\ndiffered with different humic substances treatment along with soils and\nfertilizer sources with the highest available P associated with treatments of\nrice straw  at level of 40 L\/ha for both\nsoils.<\/p>\n\n\n\n

Key words<\/strong>: Humic substances, Soluble calcium\u02cf Available P\u02cf Ammonium diphosphate\u02cf Rice straw\u02cf Calcareous soils.<\/p>\n\n\n\n

Full paper in Arabic: PDF<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Jamal H. Yaqoub*(1) andMohammed A. budalkareem(2) (1). University Services Management Administration, University of Basrah, Iraq.          (2). Department of Soil Sciences, Water Research, Faculty of Agriculture, University of Basrah, Iraq.    (*Corresponding author: Jamal H. Yaqoub  E-Mail: jam13336@Gmail.com). Received: 28\/05\/2020                               Accepted: … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-2648","post","type-post","status-publish","format-standard","hentry","category-sjar"],"_links":{"self":[{"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=\/wp\/v2\/posts\/2648","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2648"}],"version-history":[{"count":1,"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=\/wp\/v2\/posts\/2648\/revisions"}],"predecessor-version":[{"id":2649,"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=\/wp\/v2\/posts\/2648\/revisions\/2649"}],"wp:attachment":[{"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2648"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2648"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2648"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}