Vol. 27 No. 2 (1979)

Papers

• A battery-operated circuit for a self-timing leaf diffusion resistance meter.

  B. Lammers, C.J. Stigter

  111-115

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• The growth of maize in the cool temperate climate of the Netherlands: Effect of grain filling on production of dry matter and on chemical composition and nutritive value.

  B. Deinum, J. Knoppers

  116-130

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• Apple growing potentials in Europe. 1. The fulfilment of the cold requirement of the apple tree.

  H.G. Kronenberg

  131-135

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• Measurement of the rate of water flow in plants.

  K. Schurer, H. Griffioen, J.G. Kornet, G.J.W. Visscher

  136-141

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• Anaerobic digestion of piggery waste. 2. Start-up procedure

  A.F.M. van Velsen

  142-152

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• A tentative approach to the molecular structure of humic acids: The spectral evidence for a derivation of humic acids from plant-borne esters. 2. Infrared and chemical analyses.

  G. Minderman

  153-175

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• Available phosphorus in poultry. 1. Effect of phosphorus levels on the performance of laying hens and their egg quality, hatchability, bone analysis and strength in relation to calcium and phosphorus in blood plasma.

  A.R. El Boushy

  176-183

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• Available phosphorus in poultry. 2. Effect of phosphorus in diet on performance of chicks, bone composition and strength, and calcium and inorganic phosphorus in blood plasma.

  A.R. El Boushy

  184-189

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