Vol. 39 No. 1 (1991)

Papers

• Editorial

  M.L. van Beusichem

  1-1

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• Modelling ammonium and nitrate uptake by a mature Douglas-fir stand from a soil with high atmospheric NHx input

  A.J. Gijsman, P. de Willigen

  3-20

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• Dried beet pulp, pressed beet pulp and maize silage as substitutes for concentrates in dairy cow rations. 2. Feed intake, fermentation pattern and ruminal degradation characteristics.

  H. de Visser, H. Huisert, R.S. Ketelaar

  21-30

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• Temperature effects on anatomy and digestibility of leaf and stem of tropical and temperate forage species.

  J.R. Wilson, B. Deinum, F.M. Engels

  31-48

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• Fine root density and root biomass of two Douglas-fir stands on sandy soils in the Netherlands. 1. Root biomass in early summer

  A.F.M Olsthoorn

  49-60

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• Fine root density and root biomass of two Douglas-fir stands on sandy soils in the Netherlands. 2. Periodicity of fine root growth and estimation of belowground carbon allocation

  A.F.M Olsthoorn, A. Tiktak

  61-77

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