Vol. 9 No. 2 (1961)

Papers

• Solar and net radiation, available energy and its influence on evapotranspiration from grass.

  D.W. Scholte Ubing

  81-93

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• Observations on earthworm populations in orchard soils.

  J.A. van Rhee, S. Nathans

  94-100

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• Agricultural and economic development.

  G.J.A. Terra

  101-107

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• Early diagnosis of mineral deficiencies by means of plant analysis.

  H. Broeshart, J.G. van Schouwenburg

  108-117

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• The seepage of a river into a valley filled with two layers of different permeabilities

  L. Wartena

  118-121

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• Research in the field of advisory work.

  A.W. van den Ban

  122-133

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• Hypomagnesaemia in milking cows: intake and utilization of magnesium from herbage by lactating cows.

  A. Kemp, W.B. Deijs, O.J. Hemkes, A.J.H. van Es

  134-149

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