Components of functional-structural tree models R Sievänen, E Nikinmaa, P Nygren, H Ozier-Lafontaine, J Perttunen, ... Annals of forest science 57 (5), 399-412, 2000 | 291 | 2000 |
Transfer of N fixed by a legume tree to the associated grass in a tropical silvopastoral system J Sierra, P Nygren Soil Biology and Biochemistry 38 (7), 1893-1903, 2006 | 141 | 2006 |
Transfer of nitrogen from a tropical legume tree to an associated fodder grass via root exudation and common mycelial networks R Jalonen, P Nygren, J Sierra Plant, cell & environment 32 (10), 1366-1376, 2009 | 130 | 2009 |
Coarse root architecture of three boreal tree species growing in mixed stands T Kalliokoski, P Nygren, R Sievänen Silva Fennica 42, https://doi.org/10.14214/sf.252, 2008 | 126 | 2008 |
Symbiotic dinitrogen fixation by trees: an underestimated resource in agroforestry systems? P Nygren, MP Fernández, JM Harmand, HA Leblanc Nutrient cycling in agroecosystems 94 (2-3), 123-160, 2012 | 103 | 2012 |
Belowground interspecific competition in mixed boreal forests: fine root and ectomycorrhiza characteristics along stand developmental stage and soil fertility gradients T Kalliokoski, T Pennanen, P Nygren, R Sievänen, HS Helmisaari Plant and Soil 330 (1-2), 73-89, 2010 | 103 | 2010 |
Production and turnover of N2 fixing nodules in relation to foliage development in periodically pruned Erythrina poeppigiana (Leguminosae) trees P Nygren, C Ramírez Forest Ecology and Management 73 (1-3), 59-73, 1995 | 96 | 1995 |
Tree species diversity and forest structure in relation to microtopography in a tropical freshwater swamp forest in French Guiana P Koponen, P Nygren, D Sabatier, A Rousteau, E Saur Plant Ecology 173, 17-32, 2004 | 83 | 2004 |
The role of nitrogen fixation and nutrient supply in some agroforestry systems of the Americas DCL Kass, R Sylvester-Bradley, P Nygren Soil Biology and Biochemistry 29 (5-6), 775-785, 1997 | 79 | 1997 |
Internal circulation of carbon within a tree P Hari, P Nygren, E Korpilahti Canadian Journal of Forest Research 21 (4), 514-515, 1991 | 68 | 1991 |
A fractal root model applied for estimating the root biomass and architecture in two tropical legume tree species E Salas, H Ozier-Lafontaine, P Nygren Annals of Forest Science 61 (4), 337-345, 2004 | 63 | 2004 |
Nodulation and dinitrogen fixation of legume trees in a tropical freshwater swamp forest in French Guiana P Koponen, P Nygren, AM Domenach, C Le Roux, E Saur, JC Roggy Journal of Tropical Ecology 19 (6), 655-666, 2003 | 61 | 2003 |
Influence of forage harvesting regimes on dynamics of biological dinitrogen fixation of a tropical woody legume P Nygren, P Cruz, AM Domenach, V Vaillant, J Sierra Tree Physiology 20 (1), 41-48, 2000 | 60 | 2000 |
Application of the pipe model theory to non-destructive estimation of leaf biomass and leaf area of pruned agroforestry trees P Nygren, S Rebottaro, R Chavarria Agroforestry systems 23, 63-77, 1993 | 60 | 1993 |
Nitrogen-fixation dynamics in a cut-and-carry silvopastoral system in the subhumid conditions of Guadeloupe, French Antilles M Dulormne, J Sierra, P Nygren, P Cruz Agroforestry Systems 59, 121-129, 2003 | 57 | 2003 |
Dynamics of nonstructural carbohydrates and biomass yield in a fodder legume tree at different harvest intensities H Garcia, P Nygren, L Desfontaines Tree physiology 21 (8), 523-531, 2001 | 56 | 2001 |
Nitrogen transfer from a legume tree to the associated grass estimated by the isotopic signature of tree root exudates: a comparison of the 15N leaf feeding and natural 15N … J Sierra, D Daudin, AM Domenach, P Nygren, L Desfontaines European Journal of Agronomy 27 (2-4), 178-186, 2007 | 55 | 2007 |
Implications of the Kyoto Protocol for tropical forest management and land use: prospects and pitfalls J Koskela, P Nygren, F Berninger, O Luukkanen University of Helsinki (Finland) Tropical Silviculture Unit, 2000 | 54 | 2000 |
Effects of potassium deficiency and simulated acid rain, alone and in combination, on the ultrastructure of Scots pine needles T Holopainen, P Nygren Canadian Journal of Forest Research 19 (11), 1402-1411, 1989 | 54 | 1989 |
Biomass allocation and nodulation of Gliricidia sepium under two cut-and-carry forage production regimes P Nygren, P Cruz Agroforestry Systems 41 (3), 277-292, 1998 | 52 | 1998 |