Ráðunautafundur


Ráðunautafundur - 15.02.2001, Page 73

Ráðunautafundur - 15.02.2001, Page 73
63 HEIMILDIR Agnar Guðnason & Lárus Jónsson, 1961. Áburðartilraunir - sýnisreitir. Fræðslurit Búnaðarfélags íslands nr 37, 48 s. Arnheiður Þórðardóttir & Þorsteinn Guðmundsson, 1994. Jarðvegskort af Hvanneyri. Rit búvísindadeildar 4, 44 s. + 3 kort. Árni Snæbjörnsson & Jóhannes Sigvaldason, 1998. Use and recommendations of phosphorus fertilizers in Ice- land. Kungl. Skogs- och Lantbruksakademiens tidskrift 135/7: 37-42. Ball, R.P. & Ryden, J.C., 1984. Nitrogen relationships in intensively managed temperate grassland. Plant and Soil 76: 23-33. Bjarni E. Guðleifsson & Evald Schnug, 1990. The effect of soil pH on element-availability and eiement-uptake by grasses grown on Icelandic peat soils. Búvísindi 4: 11-18. Bjarni E. Guðleifsson, 1999. ísáning- sáð í gróinn svörð. Ráðunautafundur 1999, 90-99. Bjarni Helgason, 1975. Breytingar á jarðvegi af völdum ólíkra tegunda köfnunarefttisáburðar. Samanburður þriggja tegunda köfnunarefnisáburðar. íslenzkar landbúnaðarrannsóknir 7: 8-19. Bjarni Helgason, 1998. Organic phosphorus in Icelandic soils. Kungl. Skogs- och Lantbruksakademiens tidskrift 135/7: 59-67. Dart, P.J., 1986. Nitrogen fixation associated with non-legumes in agriculture. Plant and Soil 90: 303-334. Friðrik Pálmason, 2000. Heyefnagreiningar og áburðarleiðbeiningar. Ráðunautafundur2000, 123-131. Friðrik Pálmason, Gunnar Steinn Jónsson, Magnús Óskarsson & Þorsteinn Guðmundsson, 1989. Landbún- aðurinn ogumhverfið. Ráðunautafundurl989, 167-187. Friðrik Páhnason. Halldór Þorgeirsson, Hólmfríður Sigurðardóttir, Hólmgeir Bjömsson & Ólafur Arnalds, 1996. Niturlosun íjarðvegi. Búvísindi 10: 185-208. Helgi Hallgrímsson & Jóhannes Sigvaldason, 1974. Um lífið í jarðveginum. IIJ Athuganir á rannsóknarreitum á Víkurbakka við Eyjafjörð sumarið 1969. Ársrit Ræktunarfélags Norðurlands 71.36-55. Hólmgeir Björnsson, 1975a. Uppspretta og nýting köfnunarefnis. Freyr 71: 242-245. Hólmgeir Björnsson, 1975b. Köfnunarefni og grasspretta. Freyr 71: 330-337. Hólmgeir Bjömsson, 1978. Analysis of responses to long-term P-fertiiizer application when the errors are auto- regressive. Íslenzkar landbúnaðarrannsóknir 10(1): 22-33. Hólmgeir Björnsson, 1980. Niturnám gróðurs úr andrúmslofti. Freyr 76: 104-110. Hólmgeir Bjömsson, 1998. Dreifmg áburðar siðsumars og að hausti. Ráðunautafundur 1998, 141-154. Hólmgeir Björnsson & Áslaug Helgadóttir, 1988. The effect of temperature variation on grass yield in lceland, and its implications for dairy farming. í: The Impact of Climatic Variations on Agriculture. Vol. 1 Assessments in Cool Temperature and Cold Regions (ritstj. Parry, M.L., Carter, T.R. & Konijn, N.T.). Kluwer Academic Publishers Group, Dordrecht, 445-474. Hólmgeir Björnsson & Friðrik Pálmason, 1994. Áhrif áburðar- og sláttutima á efnainnihald í grasi. Ráðunauta- fundur 1994, 193-205, leiðréttingar á 4 s. Hólmgeir Björnsson, Friðrik Pálmason & Jóhannes Sigvaldason, 1975. Jord, gödsling och grasproduktion. NJF 57, 169-174. Hólmgeir Björnsson, Guðni Þorvaldsson & Þorsteinn Guðmundsson, 2001. Efnajafitvægi 1 langtímatilraun með tegundir nituráburðar á Skriðuklaustri. Ráðunautafundur 2001 (í þessu hefti). Hólmgeir Bjömsson & Magnús Óskarsson, 1978. Samanburður köfnunarefnisáburðartegunda á túnum. I. Upp- skera og efnainnihald grasa í mýrartúni á Hvanneyri. íslenskar landbúnaðarrannsóknir 10(1): 34-71. Jóhannes Sigvaldason, 1991. Fosfórþörf íslenskra túna. Ráðunautafundur 1991, 8-10. Jóhannes Sigvaldason, 1995. Áhrif snjóalaga á efnamagn í jarðvegi. Freyr 91: 416^117, 419. Jóhannes Sigvaldason, 1996. Um jarðvegsefhagreiningar. Hvemig eru þær gerðar og hvaða gagn er að þeim? Fjölrit BRT 19,22 s. Jónatan Hermannsson, 1999. Úr komtilraunum 1993-1998. Ráðunautafundur 1998, 54-61.
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