Publikationer

Artikler i internationalt anerkendte tidsskrifter
Askegaard M. & Eriksen J. (2000) Potassium retention and leaching in an organic crop rotation on loamy sand as affected by contrasting potassium budgets. Soil Use and Management 16: 200-205.

Eriksen J. & Askegaard M. (2000) Sulphate leaching in an organic crop rotation on sandy soil in Denmark. Agriculture, Ecosystems and Environment 78: 107-114.

Eriksen J., Nielsen, M., Mortensen J.V. & Schjørring J.K. (2001) Redistribution of sulphur during generative growth of barley with different sulphur and nitrogen status. Plant and Soil. In press.

Eriksen J., Olesen J.E. and Askegaard M. (2001) Sulphate leaching and sulphur balances of an organic crop rotation on three Danish soils. Indsendt til European Journal of Agronomy.

Eriksen J. & Thorup-Kristensen K. (2001) The effect of catch crops on sulphate leaching and availibility of S in the succeeding crop on sandy loam soil in Denmark. Agriculture, Ecosystems and Environment. In press.

Hansen B., Kristensen E.S., Grant R., Høgh-Jensen H., Simmelsgaard S.E. og Olesen J.E. (2000) Nitrogen leaching from conventional versus organic farming systems – a modelling approach. European Journal of Agronomy 13, 65-82.

Høgh-Jensen H., Schjørring, J.K. and Soussana, J.-F. (2001) Short and long-term responses in N2-fixation and morphology of white clover to P-deficiency. Plant, Cell & Environment (submitted).

Høgh-Jensen, H., Fabricius, V. and Schjørring, J.K. (2001) Regrowth and nutrient composition of different plant organs in grass-clover canopies as affected by phosphorus and potassium availabilities. Annals of Botany (in press)

Høgh-Jensen, H. and Schjørring, J.K. 2001. Rhizodeposition of nitrogen by red clover, white clover and ryegrass leys. Soil Biology & Biochemistry 33, 439-448.

Høgh-Jensen, H. and Schjørring, J.K. (2000) Below-ground nitrogen transfer between different grassland species: direct quantification by 15N leaf feeding compared with indirect dilution of soil 15N. Plant and Soil 227, 171-183.

Indlæg ved kongresser, symposier o.l.
Askegaard M. (1999) Nutrient management in organic crop production. NJF Kongres Rapport. Jordbrug og Samfund, Ås, 28. juni-1. juli, nr. 3, 91-99.

Askegaard M. & Eriksen J. (2000) Potassium retention and leaching in an organic dairy/crop rotation on sandy soil. Preceedings from Eurosoil 2000. University of Reading 4-6 September 2000. British Society of Soil Science. 2 pp.

Eriksen J. (1999) The sulphur balance of organic crop rotations in Denmark. I “Designing and testing crop rotations for organic farming” (Eds. Olesen, J.E., Eltun, R., Gooding, M.J., Jensen, E.S. and Köpke, U.) DARCOF Report no. 1, 251-256.

Høgh-Jensen, H. and Schjoerring, J.K. (1999) Biological nitrogen fixation under phosphorus and potassium limiting conditions. Workshop transactions for 10th Nitrogen Workshop, 23-26 August 1999, held at KVL, Copenhagen. pp. I.9.

Høgh-Jensen H. and Schjørring JK 2000 Shoot nutrient indices as indicators of nitrogen, phosphorus and potassium deficiencies in grassland. In Proceeding of Regional IPI workshop "Potassium and Phosphorus: Fertilization effects on soil and crops", pp. 124-131. Lithuania, 23-24 October, 2000.

Høgh-Jensen H., Rubæk G. and Schjørring J. K. 2000. The effect of P- and K-deficiencies on the structure and quality of grass-clover communities. In Grassland Farming. Balancing environmental and economic demands (eds.: Søegaard K., Ohlsson C., Sehested J, Hutchings N. J. and Kristensen T.), pp. 406-408. Proceedings of the 18th General Meeting of the European Grassland Federation, Aalborg, Denmark, 20-25 May 2000.

Anden formidling. F.eks. mødeindlæg, åbent hus m.m.
Eriksen J. (1999) Svovlmangel i økologisk grønsagsproduktion? Indlæg ved Temadag om økologisk frugt og grønt 3. juni 1999, Dalum landbrugsskole.

Eriksen (1999) Svovl. Indlæg ved kursus i planteernæring Koldkærgaard Landboskole d. 9. september 1999.

Planlagte publikationer og artikler
Askegaard, M., Olesen, J.E. 2001. Development in potassium leaching and exchangeable potassium when converting to organic farming on a coarse sandy soil.

Askegaard, M., Eriksen, J. XX. 2001. Release of potassium in the rhizosphere as affected by N-source and potassium status of a sandy loam.

Askegaard, M., Eriksen, J. 2001. Exchangeable potassium in soil as indicator of potassium flow in an organic crop rotation on loamy sand.

Eriksen J. & Mortensen J.V. (2001) Effects of timing of sulphur application on yield, S-uptake and quality of barley. Indsendes til Nutrient Cycling in Agroecosystems.

Mølgaard, J.P. 2001. Influence of manure on the yield and quality of organically grown potatoes.

Elly Møller Hansen, Henning Høgh-Jensen, Jørgen Djurhuus and Ole Fredslund Christensen (2001) Biological N2 fixation and patchiness in a grazed ley. In preparation.

Rubæk G and Høgh-Jensen H (2001) Relations between plant growth, N2 fixation and variations in bio-available soil P pools in a grass-clover ley. In preparation.

Høgh-Jensen H and Schjoerring JK (2001) Short and long term responses in white clover to potassium deficiency. Planned.

Høgh-Jensen H and Schjoerring JK (2001) Interactions between white clover and ryegrass under contrasting phosphorus and potassium deficiency. Planned.