Vol. 18 No. 3 (1970)

Papers

• Growth reactions of carnation, measured by net photosynthesis, on different air contents of the soil.

  A.L.M. van Wijk, J. Buitendijk

  149-157

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• The influence of soil steaming on some properties of the soil and on the growth and heading of winter glasshouse lettuce. III. The influence of nitrogen form, manganese level and shading studied in sand culture experiments with trickle irrigation.

  G. Jager, J. van der Boon, G.J.G Rauw

  158-167

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• The developmental pattern of roots and shoots of oats under favourable conditions.

  J.J. Schuurman, J.J.H. de Boer

  168-181

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• Production of carboxylates (C-A) by young sugar-beet plants grown in nutrient solution.

  F. van Egmond, V.J.G. Houba

  182-187

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• Studies on pod and bean values of Theobroma cacao L. in Nigeria. II. Number of beans per pod, with special reference to the natural pollination process.

  H. Toxopeus, V.J. Jacob

  188-194

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• The energy requirement for maintenance and production of laying hens.

  A.H.M. Grimbergen

  195-206

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• On soil genesis in temperate humid climate. VIII. The formation of a "udalfic" eutrochrepi.

  J. van Schuylenborgh, S. Slager, A.G. Jongmans

  207-214

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