Seasonal changes in leaf element content of cranberry,vaccinium macrocarponait

Abstract
Seasonal changes in leaf element composition were measured at 2‐week intervals in A Oregon cranberry bogs from June 1 to September 15 for a 3‐year period. Nitrogen, P, K, and Zn leaf concentrations decreased during the season while concentrations of Ca, Mg, B, Mn, and Fe increased. Periods of 30‐day minimal internal flux varied from July 15 to September 15, depending on the element. It was concluded that 2 samples, 1 from June 15 to July 15 for Mg, Mn, and Fe and 1 from August 15 to Sep‐ tember 1 for N, P, K, Ca, Cu, B, and Zn, would have to be taken to adequately diagnose the nutrient status of all of the essential elements for cranberry.

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