Zobrazeno 1 - 10
of 240
pro vyhledávání: '"P. VIRKAJÄRVI"'
Autor:
M. Pihlatie, Ü. Rannik, S. Haapanala, O. Peltola, N. Shurpali, P. J. Martikainen, S. Lind, N. Hyvönen, P. Virkajärvi, M. Zahniser, I. Mammarella
Publikováno v:
Biogeosciences, Vol 13, Iss 19, Pp 5471-5485 (2016)
Carbon monoxide (CO) is an important reactive trace gas in the atmosphere, while its sources and sinks in the biosphere are poorly understood. Soils are generally considered as a sink of CO due to microbial oxidation processes, while emissions of CO
Externí odkaz:
https://doaj.org/article/a6b1096515e748a28761f6bf489d0400
Autor:
S. E. Lind, N. J. Shurpali, O. Peltola, I. Mammarella, N. Hyvönen, M. Maljanen, M. Räty, P. Virkajärvi, P. J. Martikainen
Publikováno v:
Biogeosciences, Vol 13, Iss 4, Pp 1255-1268 (2016)
One of the strategies to reduce carbon dioxide (CO2) emissions from the energy sector is to increase the use of renewable energy sources such as bioenergy crops. Bioenergy is not necessarily carbon neutral because of greenhouse gas (GHG) emissions du
Externí odkaz:
https://doaj.org/article/2c65f1b9841b4cb1a0d77ec3d872b2e7
Publikováno v:
Biogeosciences, Vol 6, Iss 11, Pp 2461-2473 (2009)
Agricultural soils are the most important sources for the greenhouse gas nitrous oxide (N2O), which is produced and emitted from soils also at low temperatures. The processes behind emissions at low temperatures are still poorly known. Snow is a good
Externí odkaz:
https://doaj.org/article/8af9e402be74476ab3f12018890f17ba
Autor:
Mondli Abednicko Masanabo, Amélie Tribot, Enni Luoma, Jussi Virkajärvi, Nusrat Sharmin, Morten Sivertsvik, Suprakas Sinha Ray, Janne Keränen, M. Naushad Emmambux
Publikováno v:
Macromolecular Materials and Engineering, Vol 309, Iss 8, Pp n/a-n/a (2024)
Abstract Biodegradable poly(butylene succinate‐co‐adipate)/Poly(3‐hydroxybutyrate‐co‐3‐hydoxyvalerate) (PBSA/PHBV) filled with lignocellulosic sidestream/fibers from cowpea, a neglected and underutilized African crop are produced by injec
Externí odkaz:
https://doaj.org/article/867144fade7845249ce7be805951122b
Publikováno v:
Agricultural and Food Science, Vol 6, Iss 3 (2008)
As part of a research project concerning the agricultural utilization of cut-away peat bogs, a sod production experiment was conducted at Valkeasuo, Tohmajärvi, in 1990-1993. The aim of the experiment was to study the effect of nitrogen and choice o
Externí odkaz:
https://doaj.org/article/d7148b6daac44c30ba33db81a2e34f9c
Publikováno v:
Agricultural and Food Science, Vol 12, Iss 1 (2008)
The timing of turnout is an important factor affecting the grazing management of dairy cows. However,its consequences are not well known in the short grazing season of northern Europe. Thus, the effect of the turnout date of dairy cows to pasture on
Externí odkaz:
https://doaj.org/article/2f30d293c3bd4128a7f105ad038e8717
Autor:
P. VIRKAJÄRVI
Publikováno v:
Agricultural and Food Science, Vol 12, Iss 3-4 (2008)
Post-defoliation carbohydrate stores, leaf area and the number of active meristems are important factors affecting the subsequent regrowth of grasses. Defoliation height affects the magnitude of all these factors. Timothy (Phleum pratense L.) and mea
Externí odkaz:
https://doaj.org/article/66f9d5fe048f42dcb0e3b4e42618648e
Publikováno v:
Agricultural and Food Science, Vol 15, Iss 4 (2008)
In order to update fertilisation recommendations for Finnish silty and sandy soils, the effects of repeated phosphorus (P) fertilisation on the yields of cereals, grasses and other crops were measured at ten sites for 9 to 18 years. Results of some e
Externí odkaz:
https://doaj.org/article/f00660cd494b4290946b19b3b3127af1
Publikováno v:
Agricultural and Food Science, Vol 15, Iss 3 (2008)
Cows were assigned randomly to indoor silage feeding (with 2 h outdoor exercise) or part-time grazing treatment in two different experiments. One group was kept in confinement with ad libitum grass silage within each experiment. The other group had a
Externí odkaz:
https://doaj.org/article/934af84559194bc18c36c2b9dd0483b3
Publikováno v:
Agricultural and Food Science (2024)
Root growth of winter wheat (Triticum aestivum L.), winter rye (Secale cereale L.), red clover (Trifolium pratense L.), and timothy (Phleum pratense L.) was recorded to evaluate the environmental potential of over-wintering crops in a Nordic agroecos
Externí odkaz:
https://doaj.org/article/24eba4674233479690720054e152a14a