Vol. 19 No. 4 (1971)

Papers

• Chimerism of the tomato plant after seed irradiation with fast neutrons.

  K. Verkerk

  197-203

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• A production trial with layers of four hybrids under different environmental conditions in the Eastern Province of Saudi Arabia.

  H. Appelman, B.J. Bonhof

  204-210

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• Relation between green area duration and grain yield in some varieties of spring wheat.

  J.H.J. Spiertz, B.A. ten Hag, L.J.P. Kupers

  211-222

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• Nitrogen nutrition of rice plants measured by growth and nutrient content in pot experiments. 1. Ionic balance and selective uptake.

  M. Ismunadji, W. Dijkshoorn

  223-236

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• Experimental studies on seed production of tropical grasses in Kenya. 2. Tillering and heading in seed crops of eight grasses.

  J.G. Boonman

  237-249

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• Grain yield of winter rye and winter wheat in relation to leaf number and leaf age.

  H.D. Gmelig Meyling

  250-256

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• Feed intake by grazing dairy cows. 3. Comparison of lactating and dry pregnant cows.

  N.D. Dijkstra

  257-263

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• Climate, nitrogen and grass. 4. The influence of age on chemical composition and in vitro digestibility of maize (Zea mays L.) and tall fescue (Festuca arundinacea Schreb.).

  B. Deinum, J.G.P. Dirven

  264-272

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