"Valkama, Elena" - Selaus tekijän mukaan Luonnonvarakeskuksen julkaisut
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A global meta-analysis on nitrate nitrogen retention by buffer zones
Valkama, Elena; Usva, Kirsi; Uusi-Kämppä, Jaana
Suomen Maataloustieteellisen Seuran tiedote : 34 (Suomen Maataloustieteellinen Seura, 2018) -
A Meta-Analysis on Nitrogen Retention by Buffer Zones
Valkama, Elena; Usva, Kirsi; Saarinen, Merja; Uusi-Kämppä, Jaana
Journal of Environmental Quality : 2 (Crop Science Society of America, 2019) -
A Meta-Analysis on Nitrogen Retention by Buffer Zones
Valkama, Elena; Usva, Kirsi; Saarinen, Merja; Uusi-Kämppä, Jaana
Journal of Environmental Quality (American Society of AgronomyCrop Science Society of AmericaSoil Science Society of America, 2018) -
A simple dynamic model of soil test phosphorus responses to phosphorus balance
Uusitalo, Risto; Hyväluoma, Jari; Valkama, Elena; Ketoja, Elise; Vaahtoranta, Annika; Virkajärvi, Perttu; Grönroos, Juha; Lemola, Riitta; Ylivainio, Kari; Rasa, Kimmo; Turtola, Eila
Journal of Environmental Quality : 3 (American Society of AgronomyCrop Science Society of AmericaSoil Science Society of America, 2016) -
Additive and non-additive effects of birch genotypic diversity on arthropod herbivory in a long-term field experiment
Barton, Kasey E.; Valkama, Elena; Vehviläinen, Harri; Ruohomäki, Kai; Knight, Tiffany M.; Koricheva, Julia
Oikos (John Wiley & Sons, 2015) -
Alus- ja kerääjäkasvien potentiaali vähentää maatalouden aiheuttamaa typpikuormitusta
Lemola, Riitta; Valkama, Elena; Suojala-Ahlfors, Terhi; Känkänen, Hannu; Heikkinen, Janne; Turtola, Eila
TEHO Plus -hankkeen julkaisu : 6/2014 (2014) -
Botten- och fånggrödornas potential att minska kvävebelastningen som orsakas av jordbruket
Lemola, Riitta; Valkama, Elena; Suojala-Ahlfors, Terhi; Känkänen, Hannu; Turtola, Eila; Heikkinen, Janne
TEHO Plus -projektets publication : 8/2014 (TEHO Plus -hanke, 2014) -
Can conservation agriculture increase soil carbon sequestration? A modelling approach
Valkama, Elena; Kunypiyaeva, Gulya; Zhapayev, Rauan; Karabayev, Muratbek; Zhusupbekov, Erbol; Perego, Alessia; Schillaci, Calogero; Sacco, Dario; Moretti, Barbara; Grignani, Carlo; Acutis, Marco
Geoderma (Elsevier, 2020) -
Catch crops and nitrogen leaching loss in the Nordic countries: meta-analysis
Valkama, Elena; Lemola, Riitta; Känkänen, Hannu; Turtola, Eila
Pro Terra : 67 (Suomen Maaperätieteiden Seura, 2015) -
Catch crops as universal and effective method for reducing nitrogen leaching loss in spring cereal production: A meta-analysis
Valkama, Elena; Lemola, Riitta; Känkänen, Hannu; Turtola, Eila
Geophysical Research Abstracts (European Geosciences Union, 2016) -
Catch crops: Current results and future perspectives on environmental potential and cost-effectiveness
Valkama, Elena; Lemola, Riitta; Turtola, Eila; Känkänen, Hannu; Miettinen, Antti; Rankinen, Katri (2017) -
Changes in leaf trichomes and epicuticular flavonoids during leaf development in three birch taxa
Valkama, Elena; Salminen, Juha-Pekka; Koricheva, Julia; Pihlaja, Kalevi
Annals of Botany : 2 (Oxford University Press, 2004) -
Comparative analysis of leaf trichome structure and composition of epicuticular flavonoids in Finnish birch species
Valkama, Elena; Salminen, Juha-Pekka; Koricheva, Julia; Pihlaja, Kalevi
Annals of Botany : 6 (Oxford University Press, 2003) -
Computation of total soil organic carbon stock and its standard deviation from layered soils
Tadiello, Tommaso; Perego, Alessia; Valkama, Elena; Schillaci, Calogero; Acutis, Marco
MethodsX (Elsevier BV, 2022)To assess carbon sequestration in the agricultural and natural systems, it is usually required to report soil organic carbon (SOC) as mass per unit area (Mg ha-1) for a single soil layer (e.g., the 0-0.3 m ploughing layer). ... -
Conservation agriculture can increase carbon stock in Finnish soils: Model results
Valkama, Elena; Palojärvi, Ansa; Alakukku, Laura; Acutis, Marco
Pro Terra : 75/2019 (Suomen Maaperätieteiden SeuraHelsingin yliopisto, 2019) -
Cover crops affect pool specific soil organic carbon in cropland : A meta‐analysis
Fohrafellner, Julia; Keiblinger, Katharina M.; Zechmeister‐Boltenstern, Sophie; Murugan, Rajasekaran; Spiegel, Heide; Valkama, Elena
European journal of soil science : 2 (Wiley-Blackwell, 2024)Cover crops (CC) offer numerous benefits to agroecosystems, particularly in the realm of soil organic carbon (SOC) accrual and loss mitigation. However, uncertainties persist regarding the extent to which CCs, in co-occurrence ... -
Cropland soils in China have a large potential for carbon sequestration based on literature survey
Tao, Fulu; Palosuo, Taru; Valkama, Elena; Mäkipää, Raisa
Soil and Tillage Research (Elsevier, 2019) -
Crushed bark as a novel soil conditioner for organic plant production
Kurki, Päivi; Nurmi, Elina; Haikarainen, Iina; Savikurki, Riitta; Kaseva, Janne; Hakala, Kaija; Valkama, Elena
Italian journal of agronomy : 2 (PagePress Publications, 2021)Due to the reduction of cattle farming, the Finnish agricultural sector currently needs solutions to replace animal manure with new sustainable alternatives. This problem is especially acute for organic farms, which need ... -
Data from: A meta-analysis on nitrogen retention by buffer zones
Valkama, Elena; Usva, Kirsi; Saarinen, Merja; Uusi-Kämppä, Jaana (2018) -
Defensive effect of surface flavonoid aglycones of Betula pubescens leaves against first instar Epirrita autumnata larvae
Lahtinen, Maria; Salminen, Juha-Pekka; Kapari, Lauri; Lempa, Kyösti; Ossipov, Vladimir; Sinkkonen, Jari; Valkama, Elena; Haukioja, Erkki; Pihlaja, Kalevi
Journal of Chemical Ecology : 11 (Springer Science + Business Media, 2004)