Comparing the impacts of hiking, skiing and horse riding on trail and vegetation in different types of forest von Törn, A., Tolvanen, A., Norokorpi, Y., Tervo, R., Siikamäki, P.

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Potential for Timberline Advance in Northern Finland, as Revealed by Monitoring during 1983-99 von Juntunen, V., Neuvonen, S., Norokorpi, Y., Tasanen, T.

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The effects of UV exclusion on the soluble phenolics of young Scots pine seedlings in the subarctic von Turunen, M, Heller, W, Stich, S, Sandermann, H, Sutinen, M.-L, Norokorpi, Y

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Trichloroacetic acid as a phytotoxic air pollutant and the dose-response relationship for defoliation of Scots pine von Norokorpi, Yrjo¨, Frank, Hartmut

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Trichloroacetic acid (TCA) in pine needles caused by atmospheric emissions of kraft pulp mills von Juuti, S., Norokorpi, Y., Ruuskanen, J.

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Diversity-oriented silviculture in the Boreal Zone of Europe von Lähde, Erkki, Laiho, Olavi, Norokorpi, Yrjö

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Leaf area allocation as a guide to stocking control in multi‐aged, mixed‐conifer forests in southern Finland von O'Hara, K. L., Lähde, E., Laiho, O., Norokorpi, Y., Saksa, T.

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Stand structure as the basis of diversity index von Lähde, Erkki, Laiho, Olavi, Norokorpi, Yrjö, Saksa, Timo

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Development of Norway spruce dominated stands after single-tree selection and low thinning von Lähde, Erkki, Laiho, Olavi, Norokorpi, Yrjö, Saksa, Timo

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Revegetation after short-term trampling at subalpine heath vegetation von Törn, Anne, Rautio, Janne, Norokorpi, Yrjö, Tolvanen, Anne

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Structure transformation and volume increment in Norway spruce-dominated forests following contrasting silvicultural treatments von Lähde, Erkki, Laiho, Olavi, Norokorpi, Yrjö

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Effect of stand density on damage to birch (Betula pubescens) caused by phytotoxic air pollutants von Norokorpi, Yrjoe, Frank, Hartmut

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Nitrate reductase activity in some subarctic species and UV influence in the foliage of Betula pendula Roth. seedlings von Krywult, Marek, Turunen, Minna, Sutinen, Marja-Liisa, Derome, Kirsti, Norokorpi, Yrjö

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Trichloroacetic acid in conifer needles and arboreal lichens in forest environments von JUUTI, S, NOROKORPI, Y, HELLE, T, RUUSKANEN, J

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Haloacetic acids, phytotoxic secondary air pollutants von Frank, H, Scholl, H, Renschen, D, Rether, B, Laouedj, A, Norokorpi, Y

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Pine canker fungus, Lachnellula pini, and L. flavovirens in Finland von Kurkela, T., Norokorpi, Y.

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Leaf area and tree increment dynamics on a fertile mixed-conifer site in southern Finland von O'HARA, K. L, LÄHDE, E, LAIHO, O, NOROKORPI, Y, SAKSA, T

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Structure and yield of all-sized and even-sized conifer-dominated stands on fertile sites [stem distribution] von Laehde, E. (Finnish Forest Research Institute, Vantaa (Finlande)), Laiho, O, Norokorpi, Y, Saksa, T

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Structure and yield of all-sized and even-sized Scots pine-dominated stands [stand structure] von Laehde, E. (Finnish Forest Research Institute, Vantaa (Finlande)), Laiho, O, Norokorpi, Y, Saksa, T

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Secondary air pollutants : Epistomatal wax erosion of Scots pine needles von Gullvåg, B M, Frank, H, Norokorpi, Y

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