The objectives of this study were to
\nindependently evaluate the P sorption capacity equations for Manitoba soils and to
\ndetermine the DPS threshold limit for Manitoba soils. Also, the influence of manure
\napplication on the prediction P sorption capacity was evaluated.
\nTo achieve these objectives, 40 independent surface soil samples (0-15 cm of 20
\nmanured and 20 non-manured soils) representing the major soils of Manitoba were
\ncollected. The chemical and physical properties of the soils were determined by routine
\nlaboratory analysis. The P sorption capacities of the soils were determined using both
\nthe single and multi-point sorption methods. Portion of the soils were further incubated
\nwith different rates of P to provide different degree of P saturation. Manure application generally reduced the total capacity of the soils to sorb P. Manure
\napplication affected the predictability of P sorption capacity of the soils because of the
\ninfluence of manure application on soil properties that directly influence P sorption such
\nas Mehlich-3 extractable Ca and Mg. It was found that the influence of soil texture on P sorption was
\nmore pronounced in non-manured soils than in manured soils.
\nThe pH range of the soils is another important factor that influenced the prediction of P
\nsorption capacity of the soils. The predictive equation worked better for soils with neutral
\nto high soil pH than for soils in the acid range pH probably because of the neutral to
\nhigh alkaline pH of the soils used to formulate the original equations. From our results, the DPS threshold of Manitoba soils is 20, values of DPS greater than this will lead to unacceptable loss of P from the soil to adjacent environments.<\/p>\n","protected":false},"excerpt":{"rendered":"
The objectives of this study were to independently evaluate the P sorption capacity equations for Manitoba soils and to determine the DPS threshold limit for Manitoba soils. Also, the influence of manure application on the prediction P sorption capacity was evaluated. To achieve these objectives, 40 independent surface soil samples (0-15 cm of 20 manured […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[1809,8882,13816,19216,2858,9137,23694,6103,6104,20007,20792,2771,3807,169,258,188,16262,2365,6105,20911,4874,18011,6053,2481],"class_list":["post-3006","post","type-post","status-publish","format-standard","hentry","category-environment","tag-acid","tag-al","tag-ass","tag-assess","tag-capacity","tag-degree-of-p-saturation","tag-dir","tag-dps-threshold","tag-equations","tag-gh","tag-influence","tag-iron","tag-manitoba","tag-manure","tag-manure-management","tag-phosphorus","tag-pl","tag-risk","tag-soil-samples","tag-t","tag-tan","tag-tot","tag-use","tag-work"],"_links":{"self":[{"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/posts\/3006","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/comments?post=3006"}],"version-history":[{"count":0,"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/posts\/3006\/revisions"}],"wp:attachment":[{"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/media?parent=3006"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/categories?post=3006"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/tags?post=3006"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}