Follow
Elena Valkama
Elena Valkama
Senior Scientist, Natural Resources Institute Finland (LUKE)
Verified email at luke.fi
Title
Cited by
Cited by
Year
Hypertensive disorders and severe obstetric morbidity in the United States
EV Kuklina, C Ayala, WM Callaghan
Obstetrics & Gynecology 113 (6), 1299-1306, 2009
7912009
Effects of elevated O3, alone and in combination with elevated CO2, on tree leaf chemistry and insect herbivore performance: a meta‐analysis
E Valkama, J Koricheva, E Oksanen
Global Change Biology 13 (1), 184-201, 2007
2102007
Meta-analysis of the effects of undersown catch crops on nitrogen leaching loss and grain yields in the Nordic countries
E Valkama, R Lemola, H Känkänen, E Turtola
Agriculture, Ecosystems & Environment 203, 93-101, 2015
2082015
Comparative analysis of leaf trichome structure and composition of epicuticular flavonoids in Finnish birch species
E Valkama, JP SALMINEN, J Koricheva, K Pihlaja
Annals of Botany 91 (6), 643-655, 2003
1702003
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
1472009
The combined effects of enhanced UV-B radiation and selenium on growth, chlorophyll fluorescence and ultrastructure in strawberry (Fragaria× ananassa) and barley (Hordeum …
E Valkama, M Kivimäenpää, H Hartikainen, A Wulff
Agricultural and forest meteorology 120 (1-4), 267-278, 2003
1372003
Changes in leaf trichomes and epicuticular flavonoids during leaf development in three birch taxa
E Valkama, JP Salminen, J Koricheva, K Pihlaja
Annals of Botany 94 (2), 233-242, 2004
1312004
The impact of reed management on wildlife: a meta-analytical review of European studies
E Valkama, S Lyytinen, J Koricheva
Biological conservation 141 (2), 364-374, 2008
1142008
Can conservation agriculture increase soil carbon sequestration? A modelling approach
E Valkama, G Kunypiyaeva, R Zhapayev, M Karabayev, E Zhusupbekov, ...
Geoderma 369, 114298, 2020
942020
Leaf surface traits: overlooked determinants of birch resistance to herbivores and foliar micro-fungi?
E Valkama, J Koricheva, JP Salminen, M Helander, I Saloniemi, ...
Trees 19, 191-197, 2005
862005
Nitrogen balances and yields of spring cereals as affected by nitrogen fertilization in northern conditions: A meta-analysis
E Valkama, T Salo, M Esala, E Turtola
Agriculture, ecosystems & environment 164, 1-13, 2013
832013
A meta‐analysis on nitrogen retention by buffer zones
E Valkama, K Usva, M Saarinen, J Uusi‐Kämppä
Journal of Environmental Quality 48 (2), 270-279, 2019
722019
Cropland soils in China have a large potential for carbon sequestration based on literature survey
F Tao, T Palosuo, E Valkama, R Mäkipää
Soil and Tillage Research 186, 70-78, 2019
692019
Yield response models to phosphorus application: a research synthesis of Finnish field trials to optimize fertilizer P use of cereals
E Valkama, R Uusitalo, E Turtola
Nutrient Cycling in Agroecosystems 91, 1-15, 2011
652011
Defensive Effect of Surface Flavonoid Aglycones of Betula pubescens Leaves Against First Instar Epirrita autumnata Larvae
M Lahtinen, JP Salminen, L Kapari, K Lempa, V Ossipov, J Sinkkonen, ...
Journal of Chemical Ecology 30, 2257-2268, 2004
542004
Additive and non‐additive effects of birch genotypic diversity on arthropod herbivory in a long‐term field experiment
KE Barton, E Valkama, H Vehviläinen, K Ruohomäki, TM Knight, ...
Oikos 124 (6), 697-706, 2015
462015
Nitrogen fertilization of grass leys: Yield production and risk of N leaching
E Valkama, K Rankinen, P Virkajärvi, T Salo, P Kapuinen, E Turtola
Agriculture, Ecosystems & Environment 230, 341-352, 2016
412016
Delayed induced responses of birch glandular trichomes and leaf surface lipophilic compounds to mechanical defoliation and simulated winter browsing
E Valkama, J Koricheva, V Ossipov, S Ossipova, E Haukioja, K Pihlaja
Oecologia 146, 385-393, 2005
402005
New pedotransfer approaches to predict soil bulk density using WoSIS soil data and environmental covariates in Mediterranean agro-ecosystems
C Schillaci, A Perego, E Valkama, M Märker, S Saia, F Veronesi, A Lipani, ...
Science of the total environment 780, 146609, 2021
372021
Meta‐analysis of grass ley response to phosphorus fertilization in F inland
E Valkama, P Virkajärvi, R Uusitalo, K Ylivainio, E Turtola
Grass and Forage Science 71 (1), 36-53, 2016
352016
The system can't perform the operation now. Try again later.
Articles 1–20