Rhizomes of wild lowbush blueberry ( Vaccinium angustifolium Aiton) extend horizontally, creating spatial dependency when fertilization trials are performed. Knowing this would help researchers to better design field studies. Here, we used labelled nitrogen (N) fertilizer 15 N-(NH 4 ) 2 SO measure N translocation among stems for one old (56 year) and younger (15 commercial field. Leaf concentra...