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CRANBERRIES
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Cranberry Tissue Testing

Recommended link for very thorough information about cranberry tissue testing: http://extension.oregonstate.edu/catalog/html/em/em8610/

 
Nutrient
Normal Concentration*
Nitrogen (N)
0.9-1.1%
Phosphorus (P)
0.1-0.2%
Potassium (K)
0.4-0.75%
Calcium (Ca)
0.3-0.8%
Magnesium (Mg)
0.15-0.25%
Sulfur (S)
0.08-0.25%
Boron (B)
15-60 ppm
Iron (Fe)**
>20 ppm
Manganese (Mn)**
>10 ppm
Zinc (Zn)
15-30 ppm
Copper (Cu)
4-10 ppm
* Normal levels are based on samples taken between August 15 and Sept. 15.  If your sample is taken at any other time of the season, do not compare the results with these standards. But samples taken at other times of the season can still be beneficial for comparative purposes (in other words, comparing one sample to another sample--assuming they are collected on the same day).
** Cranberry researchers have not found a normal range for Fe and Mn.
If you have comments or questions about this page,
contact Charles Armstrong at: charlesa@umext.maine.edu
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These pages are currently being maintained by the Pest Management Office, University of Maine Cooperative Extension. Page Last Modified: 09/26/08