Langström, B., O. Tenow, A. Ericsson, C. Hellqvist, and S. Larsson. 1990. Effects on shoot pruning on stem growth, needle biomass, and dynamics of carbohydrates and nitrogen in Scots pine as related to season and tree age . Canadian Journal of Forest Research 20:514-523.
Langström et al. 1990
Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
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