Perttu Virkajärvi
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Geciteerd door
Defoliation and patchy nutrient return drive grazing effects on plant and soil properties in a dairy cow pasture
J Mikola, H Setälä, P Virkajärvi, K Saarijärvi, K Ilmarinen, W Voigt, ...
Ecological Monographs 79 (2), 221-244, 2009
Phosphorus fertilization: a meta-analysis of 80 years of research in Finland
E Valkama, R Uusitalo, K Ylivainio, P Virkajärvi, E Turtola
Agriculture, ecosystems & environment 130 (3-4), 75-85, 2009
Fluxes of nitrous oxide and nitric oxide from experimental excreta patches in boreal agricultural soil
M Maljanen, M Martikkala, HT Koponen, P Virkajärvi, PJ Martikainen
Soil Biology and Biochemistry 39 (4), 914-920, 2007
N2O emissions from boreal grass and grass-clover pasture soils
P Virkajärvi, M Maljanen, K Saarijärvi, J Haapala, PJ Martikainen
Agriculture, ecosystems & environment 137 (1-2), 59-67, 2010
How can forage production in Nordic and Mediterranean Europe adapt to the challenges and opportunities arising from climate change?
Å Ergon, G Seddaiu, P Korhonen, P Virkajärvi, G Bellocchi, M Jørgensen, ...
European Journal of Agronomy 92, 97-106, 2018
Nitrous oxide production in boreal soils with variable organic matter content at low temperature–snow manipulation experiment
M Maljanen, P Virkajärvi, J Hytönen, M Öquist, T Sparrman, ...
Biogeosciences 6 (11), 2461-2473, 2009
Key challenges and priorities for modelling European grasslands under climate change
RP Kipling, P Virkajärvi, L Breitsameter, Y Curnel, T De Swaef, ...
Science of the Total Environment 566, 851-864, 2016
Neglecting diurnal variations leads to uncertainties in terrestrial nitrous oxide emissions
NJ Shurpali, Ü Rannik, S Jokinen, S Lind, C Biasi, I Mammarella, ...
Scientific Reports 6 (1), 1-9, 2016
Modeling European ruminant production systems: Facing the challenges of climate change
RP Kipling, A Bannink, G Bellocchi, T Dalgaard, NJ Fox, NJ Hutchings, ...
Agricultural Systems 147, 24-37, 2016
Ammonia volatilization from artificial dung and urine patches measured by the equilibrium concentration technique (JTI method)
K Saarijärvi, PK Mattila, P Virkajärvi
Atmospheric Environment 40 (27), 5137-5145, 2006
Effect of herbage allowance on pasture utilization, regrowth and milk yield of dairy cows in early, mid and late season
P Virkajärvi, A Sairanen, JI Nousiainen, H Khalili
Animal Feed Science and Technology 97 (1-2), 23-40, 2002
Nitrogen dynamics of cattle dung and urine patches on intensively managed boreal pasture
K Saarijärvi, P Virkajärvi
The Journal of agricultural science 147 (4), 479-491, 2009
Harmfulness of weather events and the adaptive capacity of farmers at high latitudes of Europe
P Peltonen-Sainio, A Venäläinen, HM Mäkelä, P Pirinen, M Laapas, ...
Climate Research 67 (3), 221-240, 2016
Concentrate supplementation responses of the pasture-fed dairy cow
A Sairanen, H Khalili, P Virkajärvi
Livestock Science 104 (3), 292-302, 2006
N and P leaching and microbial contamination from intensively managed pasture and cut sward on sandy soil in Finland
K Saarijärvi, P Virkajärvi, H Heinonen-Tanski, I Taipalinen
Agriculture, ecosystems & environment 104 (3), 621-630, 2004
Tiller characteristics of timothy and tall fescue in relation to herbage mass accumulation
P Virkajärvi, K Pakarinen, M Hyrkäs, M Seppänen, G Bélanger
Crop Science 52 (2), 970-980, 2012
Vernalization response of Phleum pratense and its relationships to stem lignification and floral transition
MM Seppänen, K Pakarinen, V Jokela, JR Andersen, A Fiil, A Santanen, ...
Annals of botany 106 (5), 697-707, 2010
Managing resilience of forage crops to climate change through response diversity
H Mäkinen, J Kaseva, P Virkajärvi, H Kahiluoto
Field Crops Research 183, 23-30, 2015
Regrowth simulation of the perennial grass timothy
Q Jing, G Bélanger, V Baron, H Bonesmo, P Virkajärvi, D Young
Ecological Modelling 232, 64-77, 2012
Leaf dynamics of timothy and meadow fescue under Nordic conditions
P Virkajärvi, K Järvenranta
Grass and Forage Science 56 (3), 294-304, 2001
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Artikelen 1–20