Summary
Branch development inP. radiata seedlings and young trees is affected by the level of nitrogen supply. A marginal nitrogen deficiency reduces branch and stem diameter growth much more than it does stem height growth. On soils of low N content mature trees have better than normal form. Fertilizing young trees may have undesirable side effects such as promoting branch growth and reducing leader dominance.
References
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Will, G.M. Nitrogen supply, apical dominance and branch growth inPinus radiata . Plant Soil 34, 515–517 (1971). https://doi.org/10.1007/BF01372806
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DOI: https://doi.org/10.1007/BF01372806