Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Gudni Thorvaldsson"'
Autor:
Anne Mette Dahl Jensen, Jan Tangsveen, Trond Pettersen, Tania Gneist, Kristine Sundsdal, Trygve Aamlid, Torben Kastrup Petersen, Karin Juul Hesselsøe, Gudni Thorvaldsson, Pia Heltoft, Bjarni Hannesson, Tatsiana Espevig, Wendy Waalen, Per Soelberg Sørensen
Publikováno v:
International Turfgrass Society Research Journal. 14:528-532
Autor:
Gudni Thorvaldsson, Perttu Virkajärvi, Mats Höglind, Oiva Niemeläinen, Lauri Jauhiainen, Tomas Persson, Magnus Halling, Anne-Maj Gustavsson
Publikováno v:
Field Crops Research. 161:87-97
Simulation models are frequently applied to determine the production potential of forage grasses under various scenarios, including climate change. Thorough calibrations and evaluations of forage grass models can help improve their applicability. Thi
Publikováno v:
Acta Agriculturae Scandinavica, Section B — Soil & Plant Science. 62:10-23
EU requirements for Integrated Pest Management (IPM), perhaps even pesticide-free management, have implications for choice of turfgrass species and varieties for golf courses. This paper reports results from variety testing for putting greens in the
Publikováno v:
Acta Agriculturae Scandinavica, Section B — Soil & Plant Science. 57:322-328
The effects of growth temperature on digestibility and fibre concentration of seven grass species: Kentucky bluegrass (Poa pratensis L), timothy (Phleum pratense L), meadow foxtail (Alopecurus prat...
Publikováno v:
CATENA. 56:213-224
The effects of long-term fertilizer use on soil pH and accumulation of soil organic matter are assessed under permanent grassland. Ammonium nitrate, 75 and 120 kg N ha−1, and 120 kg N ha−1 each of ammonium sulphate and calcium nitrate were applie
Autor:
Ralph C. Martin, Gudni Thorvaldsson
Publikováno v:
Acta Agriculturae Scandinavica, Section B - Soil & Plant Science. 54:14-22
The effect of temperature on the growth rate of shoots and roots for seven grass species was investigated in a growth chamber experiment. The following species were tested: Alopecurus pratensis L, Deschampsia caespitosa L (PB), Festuca pratensis Huds
Autor:
Gudni Thorvaldsson, Holger Kirchmann
Publikováno v:
European Journal of Agronomy. 12:145-161
This article points out the kinds of problems agriculture is facing, outlines and structures agricultural quality components and defined aims for them, discusses the shortcomings of organic farming, proposes some important research areas and presents
Autor:
Gudni Thorvaldsson
Publikováno v:
Acta Agriculturae Scandinavica, Section B - Soil & Plant Science. 46:121-127
The botanical composition of grass fields in Iceland was investigated during the years 1990-1993. The investigation included 1294 grass fields on 191 farms. More than 50 species were recorded. The most common species were Poa pratensis, Festuca rubra
Autor:
Gudni Thorvaldsson
Publikováno v:
Acta Agriculturae Scandinavica, Section B - Soil & Plant Science. 42:158-163
The effect of temperature on growth, development and crude protein content of timothy (Phleum pratense L.) was investigated. Plants were grown in pots outdoors and placed in four growth chambers at different mean temperatures (8, 12, 16 and 20°C) an
Autor:
Gudni Thorvaldsson, Holger Kirchmann, Lars-Olov Eriksson, Mikael Winninge, Martin H. Gerzabek, Olof Andrén, Lars Bergström
Publikováno v:
Organic Crop Production – Ambitions and Limitations ISBN: 9781402093159
Organic agriculture can be traced back to the early 20th century, initiated by the Austrian spiritual philosopher Rudolf Steiner. It was later diversified by a number of key people, and more recent versions are guided by principles issued by the Inte
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4696a37fbb38acbcc4df1a80f5266fcd
https://doi.org/10.1007/978-1-4020-9316-6_2
https://doi.org/10.1007/978-1-4020-9316-6_2