Vol. 17 No. 2 (1969)

Papers

• Boron deficiency in sugar cane, oil palm and other monocotyledons on volcanic soils of Ecuador.

  D. Tollenaar

  81-91

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• A study on the suitability of some soils in Northern Surinam for Pinus caribaea var. Hondurensis.

  S. Slager, J.P. Schulz

  92-98

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• Yield depressions due to lowering of the watertable on sandy soils in the Netherlands.

  J.M. Groot, A.W. de Jager

  99-108

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• The biological activities of vitamin A acetate and vitamin A palmitate: experiments with chickens.

  L. Bolhuis, K. Kortenoeven

  109-118

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• Prediction of forage digestibility from some laboratory procedures.

  B. Duinum, P.J. van Soest

  119-127

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• Leaching of arsenic from soil.

  P.M. Tammes, M.M. de Lint

  128-132

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• Some responses of the root and the shoot of Vida faba plants to water stress.

  A.H. El Nadi, R. Brouwer, J.T. Locher

  133-142

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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. I. Changes in chemical and physical properties.

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

  143-152

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• Maturation in peas. 1. A visual method of maturity assessment.

  P.A. Schippers

  153-160

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• Interrelation between frequency dominance and dry-weight percentages of species in grassland vegetation.

  J.G.P. Dirven, B.J. Hoogers, D.M. de Vries

  161-167

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