{"id":978,"date":"2015-04-27T15:23:52","date_gmt":"2015-04-27T19:23:52","guid":{"rendered":"http:\/\/site.extension.uga.edu\/brooksag\/?p=978"},"modified":"2015-04-27T15:23:52","modified_gmt":"2015-04-27T19:23:52","slug":"chemical-and-fertilization-injection-into-pivot-irrigation-systems","status":"publish","type":"post","link":"https:\/\/site.extension.uga.edu\/brooksag\/2015\/04\/chemical-and-fertilization-injection-into-pivot-irrigation-systems\/","title":{"rendered":"Chemical and Fertilization Injection into Pivot Irrigation Systems"},"content":{"rendered":"

This article was provided by Dr. Wes Porter, UGA\/AU Extension Irrigation Specialist<\/strong><\/p>\n

Traditionally we typically like to apply fertilizers and chemicals using either ground based (both fertilizers and chemicals) or aerial (typically just chemicals) application methods.\u00a0 However, we often times are under a time and suitable field working day constraint when it comes to applying many products.\u00a0 Farmers also typically put more production inputs into irrigation crop land.\u00a0 It\u2019s known that irrigation has a higher yield potential and helps to protect that yield potential especially in dry years.\u00a0 Thus, we want to do a more thorough job and provide the crops under irrigation with a more robust production plan to ensure we capture the full yield potential.\u00a0\"Corn<\/a>Due to excessive rainfall during the growing season and in some cases excessive plant growth and height, it becomes difficult and sometimes impossible to enter a field to apply the proper chemicals and\/or fertilizers.\u00a0 In this case the addition of an injection pump for chemigation and fertigation can be very advantageous.\u00a0 A center pivot can typically walk around the field when the moisture level is much higher than can a ground based sprayer.\u00a0 Thus, one main advantage is the ability to apply nutrients at critical periods of crop demand.<\/p>\n

One of the most daunting tasks in using a center pivot for chemigation or fertigation is calculating the injection rate of the fertilizer or chemical.\u00a0 The following process and example can be found at https:\/\/extension.tennessee.edu\/publications\/Documents\/W303.pdf<\/strong><\/a> along with more information about specifics on Fertigation of Row-crops.<\/p>\n

Steps for calculating fertilizer injection rate:<\/p>\n

    \n
  1. Determine the irrigated area (acres)<\/li>\n
  2. Determine the required application rate of product (in gallons per acre)<\/li>\n
  3. Determine the amount required<\/li>\n
  4. Determine the injection rate<\/li>\n<\/ol>\n

    For a practical example:<\/p>\n

    Let\u2019s assume that you want to apply 30 lbs N\/ac of UAN-32 through a 1,500 ft long center pivot at a rate of 0.3 inches in 12 hours (one complete circle).<\/p>\n

      \n
    1. Irrigated area = = 3.14 * 1,5002<\/sup>= 7,065,000 ft2<\/sup>\n
        \n
      1. Divide ft2<\/sup> by 43,560 to get acres = 7,065,000 \u00f7 43,560 = 162.2 acres<\/li>\n<\/ol>\n<\/li>\n
      2. Determine application rate: = 30 lbs N\/ac \u00f7 3.5 lb N\/gal = 8.6 gal\/ac<\/li>\n
      3. Determine required amount: \u00a0= 8.6 gal\/ac * 162.2 acres = 1390.3 gallons<\/li>\n
      4. Injection Rate: \u00a0= 1390.3 gal \u00f7 12 h = 115.9 gal\/h<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"

        This article was provided by Dr. Wes Porter, UGA\/AU Extension Irrigation Specialist Traditionally we typically like to apply fertilizers and chemicals using either ground based (both fertilizers and chemicals) or aerial (typically just chemicals) application methods.\u00a0 However, we often times are under a time and suitable field working day constraint when it comes to applying […]<\/p>\n","protected":false},"author":61,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[19],"tags":[],"class_list":["post-978","post","type-post","status-publish","format-standard","hentry","category-irrigation"],"_links":{"self":[{"href":"https:\/\/site.extension.uga.edu\/brooksag\/wp-json\/wp\/v2\/posts\/978","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/site.extension.uga.edu\/brooksag\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/site.extension.uga.edu\/brooksag\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/site.extension.uga.edu\/brooksag\/wp-json\/wp\/v2\/users\/61"}],"replies":[{"embeddable":true,"href":"https:\/\/site.extension.uga.edu\/brooksag\/wp-json\/wp\/v2\/comments?post=978"}],"version-history":[{"count":1,"href":"https:\/\/site.extension.uga.edu\/brooksag\/wp-json\/wp\/v2\/posts\/978\/revisions"}],"predecessor-version":[{"id":979,"href":"https:\/\/site.extension.uga.edu\/brooksag\/wp-json\/wp\/v2\/posts\/978\/revisions\/979"}],"wp:attachment":[{"href":"https:\/\/site.extension.uga.edu\/brooksag\/wp-json\/wp\/v2\/media?parent=978"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/site.extension.uga.edu\/brooksag\/wp-json\/wp\/v2\/categories?post=978"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/site.extension.uga.edu\/brooksag\/wp-json\/wp\/v2\/tags?post=978"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}