This chapter review the situation on the availability of macronutrients, nitrogen (N), phosphorus (P) and potassium (K) by field crops. The importance of ammoniacal N is presented, this N portion is rapidly used by the crop and its availability is close to fertilizer N. Method and time of manure application are also discussed. To improve N utilization by the crop, the contact of manure to air while spreading should be lowered to a minimum and spreading time should be as close as possible to the time the plant is going to need N. Long term ammonia release after spreading is discussed along with methods to measure the N availability in manure. P availability to crops is also discussed and is considered to be as available as fertilizer P, a value of about 40%. Part of the phosphorus in the manure is organic P and represent 5 to 15% of the total P in the manure. More research is needed to evaluate if the availability of 40% is really valid. Long-term manure P contributions to soil should still be evaluated by soil P tests. As for K, its availability is considered as high as for fertilizer K.<\/p>\n","protected":false},"excerpt":{"rendered":"
This chapter review the situation on the availability of macronutrients, nitrogen (N), phosphorus (P) and potassium (K) by field crops. The importance of ammoniacal N is presented, this N portion is rapidly used by the crop and its availability is close to fertilizer N. Method and time of manure application are also discussed. To improve […]<\/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":[8882,2096,229,17063,10033,13816,648,12396,24071,16845,9628,20007,875,1423,14065,169,1424,362,10859,187,363,188,16262,876,2120,14980,210,297,298,20911,4874,1579,18011],"class_list":["post-1808","post","type-post","status-publish","format-standard","hentry","category-environment","tag-al","tag-alternative","tag-ammonia","tag-ammoniac","tag-arc","tag-ass","tag-availability","tag-availability-of-macronutrients","tag-availability-to-macronutrients","tag-close","tag-contact","tag-gh","tag-k","tag-macronutrients","tag-macronutrients-for-field-crops","tag-manure","tag-manure-systems","tag-n","tag-nat","tag-nitrogen","tag-p","tag-phosphorus","tag-pl","tag-potassium","tag-release","tag-search","tag-slurry","tag-soil","tag-soils","tag-t","tag-tan","tag-test","tag-tot"],"_links":{"self":[{"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/posts\/1808","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=1808"}],"version-history":[{"count":0,"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/posts\/1808\/revisions"}],"wp:attachment":[{"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/media?parent=1808"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/categories?post=1808"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/tags?post=1808"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}