Vol. 12 No. 4 (1964)

Papers

• Some aspects of agricultural extension work in development countries.

  A. Perk

  249-259

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• Preliminary study of natural cross-fertilization in mung bean, Phaseolus aureus Roxb.

  H.A. van Rheenen

  260-262

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• Sodium requirement of milking cows: balance trials with cows on rations of freshly mown herbage and on winter rations.

  A. Kemp

  263-280

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• The measurement of labour productivity: a case study.

  H.A. Luning

  281-290

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• On soil genesis in temperate humid climate. IV. The "low humus podzols".

  J. van Schuylenborgh

  291-296

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• The difference in development rate of rye in relation to the number of spikelets per ear.

  R.F. Hoogland

  297-309

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• Copper metabolism in milch cows. I. A proposed method of liver measurement after injection of radio-copper.

  W.T. Binnert

  310-317

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• A selection experiment with pigs: comparison of the effectiveness of individual selection and sib selection.

  D. Minkema, M. Bekedam, D. Kroeske, T. Stegenga

  318-329

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