{"id":576,"date":"2010-02-05T10:38:05","date_gmt":"2010-02-05T15:38:05","guid":{"rendered":"https:\/\/extension.umaine.edu\/cranberries\/?page_id=576"},"modified":"2019-02-06T16:51:01","modified_gmt":"2019-02-06T16:51:01","slug":"february","status":"publish","type":"page","link":"https:\/\/extension.umaine.edu\/cranberries\/grower-services\/cranberry-management-calendar\/february\/","title":{"rendered":"February (Maine Cranberry Management Calendar)"},"content":{"rendered":"

February:<\/strong> This is typically when Maine growers will apply sand (if needed). A 2006-2008 study out of Massachusetts has steered researchers there towards recommending that a good all-around canopy management\u00a0strategy appears to be this:\u00a0Sand every 5 to 6 years, with pruning in between.<\/strong>\u00a0For the least impact on yield, the study found that whenever a ‘sanding’ or ‘pruning’ is done, it should be done on the light side (~half inch of sand in the case of sanding, and a single pass with the pruner in the\u00a0case of pruning).<\/p>\n

Summary of the Study:<\/h3>\n

Presented at the NACREW<\/strong> (North American Cranberry Research & Extension Workers Conference in Moncton, New Brunswick, Canada, in August of 2009)<\/p>\n

\u201cSanding and Pruning Differentially Impact Cranberry Yield and Canopy Characteristics\u201d \u2013 by Carolyn DeMoranville. The study was undertaken to see if pruning might allow Massachusetts growers to move away from sanding, at least in some years, or to use pruning alternately with sanding.<\/p>\n

Some reasons why we sand and\/or prune:<\/strong><\/p>\n

    \n
  • To prevent excessive vegetative growth (resource competition \u00e0 lower yields);<\/li>\n
  • To minimize\/reduce shading;<\/li>\n
  • To prevent fungal diseases<\/li>\n<\/ul>\n

    Sanding:<\/strong><\/p>\n

      \n
    • Increase in productivity;<\/li>\n
    • Improved pest management \u2013 insects primarily;<\/li>\n
    • Typically done every 2 to 5 years;<\/li>\n
    • \u00bd\u201d is beneficial in the 2nd<\/sup> year following the sanding;<\/li>\n
    • 1\u201d is detrimental to yield but sometimes a good option for pest control;<\/li>\n<\/ul>\n

      Pruning:<\/strong><\/p>\n

        \n
      • 10% lower yield in 1st<\/sup> year, but a 45% increase the following year;<\/li>\n
      • Can overcome sanding challenges\/problems (sanding is expensive and there are uniformity issues);<\/li>\n
      • Never before compared directly against sanding in a side-by-side fashion;<\/li>\n<\/ul>\n

        Study Design & Results:<\/strong><\/p>\n

          \n
        • Randomized Complete Block arranged in a Split-plot Design;<\/li>\n
        • Sanding: Resulted in reduced leaf area<\/strong> (fewer uprights), and there was a carry-over to the 2nd<\/sup> year, too;<\/li>\n
        • Light penetration<\/strong> is greater with sanding, initially, but after two years the light penetration amounts are equal between sanding versus pruning;<\/li>\n
        • Leaf wetness<\/strong>: greater with pruning (compared to sanding);<\/li>\n
        • Yield:<\/strong> negative impact on yield with sanding, especially if sanding heavy (1.5\u201d or more);<\/li>\n
        • TAcy:<\/strong> increased in pruning treatments only;<\/li>\n<\/ul>\n

          \u00a0<\/strong>Returns Per Acre with Pruning:<\/strong><\/p>\n\n\n\n\n\n\n\n
          <\/td>\nInitial Cost<\/strong><\/td>\n2006 gross<\/strong><\/td>\n2006 net<\/strong><\/td>\n2007 gross<\/strong><\/td>\n2007 net<\/strong><\/td>\n2 yrs<\/strong>
          \nnet value<\/strong><\/td>\n<\/tr>\n
          Control<\/td>\n$0<\/td>\n$9,021<\/td>\n$5,821<\/td>\n$7,204<\/td>\n$3,904<\/td>\n$9,725<\/td>\n<\/tr>\n
          Light Pruning*<\/td>\n$179<\/td>\n$13,592<\/td>\n$10,213<\/td>\n$9,309<\/td>\n$6,009<\/td>\n$16,222<\/td>\n<\/tr>\n
          Moderate Pruning*<\/td>\n$885<\/td>\n$8,410<\/td>\n$4,852<\/td>\n$6,089<\/td>\n$2,789<\/td>\n$7,641<\/td>\n<\/tr>\n
          Heavy Pruning*<\/td>\n$1,327<\/td>\n$6,870<\/td>\n$3,133<\/td>\n$6,675<\/td>\n$3,375<\/td>\n$6,508<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

          *Light pruning = 1 pass with pruner; Moderate pruning = 2 passes; Heavy pruning = 3 passes;<\/p>\n

          Returns Per Acre with Sanding:<\/strong><\/p>\n\n\n\n\n\n\n\n
          <\/td>\nInitial Cost<\/strong><\/td>\n2006 gross<\/strong><\/td>\n2006 net<\/strong><\/td>\n2007 gross<\/strong><\/td>\n2007 net<\/strong><\/td>\n2 yrs<\/strong>
          \nnet value<\/strong><\/td>\n<\/tr>\n
          Control<\/td>\n$0<\/td>\n$8,118<\/td>\n$4,918<\/td>\n$8,749<\/td>\n$5,449<\/td>\n$10,367<\/td>\n<\/tr>\n
          Light Sanding (1\/2\u201d)<\/td>\n$3,190<\/td>\n$11,363<\/td>\n$6,872<\/td>\n$9,335<\/td>\n$6,035<\/td>\n$12,907<\/td>\n<\/tr>\n
          Moderate Sanding<\/td>\n$5,965<\/td>\n$5,337<\/td>\n– <\/em>$277<\/td>\n$4,431<\/td>\n$1,131<\/td>\n$854<\/td>\n<\/tr>\n
          Heavy Sanding (1.5\u201d+)<\/td>\n$8,734<\/td>\n$4,232<\/td>\n– $2,503<\/td>\n$2,621<\/td>\n– $679<\/td>\n– $3,182<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

          Conclusions:<\/strong><\/p>\n

            \n
          • Light<\/em> sanding or<\/u> light<\/em> pruning can be a useful tool for canopy management;<\/strong><\/li>\n
          • Sanding has greater risk <\/em><\/strong>(More expensive; heavier amounts are detrimental, even after the 2nd<\/sup> year following the sanding)<\/li>\n
          • Resulting Recommendation Now Being Pitched to Massachusetts growers: <\/em><\/strong>Sand every 5 to 6 years, with pruning in between.\u00a0 <\/strong><\/li>\n<\/ul>\n

            One Last Important Point: <\/em><\/strong>Is mowing viable?\u00a0 Answer appears to be Yes!<\/strong>\u00a0 There is a big bounce-back in Year 3.<\/p>\n","protected":false},"excerpt":{"rendered":"

            February: This is typically when Maine growers will apply sand (if needed). A 2006-2008 study out of Massachusetts has steered researchers there towards recommending that a good all-around canopy management\u00a0strategy appears to be this:\u00a0Sand every 5 to 6 years, with pruning in between.\u00a0For the least impact on yield, the study found that whenever a ‘sanding’ […]<\/p>\n","protected":false},"author":60,"featured_media":0,"parent":574,"menu_order":2,"comment_status":"closed","ping_status":"closed","template":"templates\/page-withsidebar.php","meta":{"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-576","page","type-page","status-publish","hentry"],"yoast_head":"\nFebruary (Maine Cranberry Management Calendar) - Cooperative Extension: Cranberries - University of Maine Cooperative Extension<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/extension.umaine.edu\/cranberries\/grower-services\/cranberry-management-calendar\/february\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"February (Maine Cranberry Management Calendar) - Cooperative Extension: Cranberries - University of Maine Cooperative Extension\" \/>\n<meta property=\"og:description\" content=\"February: This is typically when Maine growers will apply sand (if needed). 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