Heljä-Sisko Helmisaari

发表

Above- and below-ground N stocks in coniferous boreal forests in Finland: Implications for sustainability of more intensive biomass utilization

Pekka Nöjd, Pasi Rautio, Liisa Ukonmaanaho, 2014 .

Morphological plasticity of ectomycorrhizal short roots in Betula sp and Picea abies forests across climate and forest succession gradients: its role in changing environments

Ivika Ostonen, H. Helmisaari, V. Uri, 2013, Front. Plant Sci..

Fluxes of dissolved organic and inorganic nitrogen in relation to stand characteristics and latitude in Scots pine and Norway spruce stands in Finland

Pekka Nöjd, Liisa Ukonmaanaho, John Derome, 2008 .

Redefining fine roots improves understanding of below-ground contributions to terrestrial biosphere processes.

Dali Guo, Robert B Jackson, M Luke McCormack, 2015, The New phytologist.

Fine root biomass in relation to site and stand characteristics in Norway spruce and Scots pine stands.

Pekka Nöjd, John Derome, P. Nöjd, 2007, Tree physiology.

Multi-element analysis of fine roots of Scots pine by total reflection x-ray fluorescence spectrometry

Arturs Viksna, Heljä-Sisko Helmisaari, Marie Olsson, 1999 .

Element accumulation in boreal bryophytes, lichens and vascular plants exposed to heavy metal and sulfur deposition in Finland.

John Derome, I. Vanha-Majamaa, M. Salemaa, 2004, The Science of the total environment.

Logging residue removal after thinning in Nordic boreal forests: Long-term impact on tree growth

Pekka Tamminen, Kjersti Holt Hanssen, K. Hanssen, 2011 .

Unravelling the age of fine roots of temperate and boreal forests

Fritz H Schweingruber, Ivano Brunner, Frank Hagedorn, 2018, Nature Communications.