An investigation of photosynthetic C-fixation in fynbos growth forms and its variation with season and environmental conditions by Van der Heyden, Francois

Other Authors: “…Lewis, O A M…”
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An investigation of nitrogen cycling processes in a coastal fynbos ecosystem in the South Western Cape Province, South Africa by Stock, William David

Other Authors: “…Lewis, O A M…”
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A ¹⁵N study of the effects of nitrate, ammonium and nitrate plus ammonium nutrition on nitrogen assimilation in Hordeum vulgare by Chadwick, Susan Glynnis

Other Authors: “…Lewis, O A M…”
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An investigation of aspects of the nitrogen physiology of Helianthus annuus L by Kaiser, James J

Other Authors: “…Lewis, O A M…”
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An 15N study of the effects of nitrate, ammonium, and nitrate + ammonium nutrition on nitrogen assimilation in Zea Mays L. by Murphy, Andrew Telfer

Other Authors: “…Lewis, O A M…”
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Amelioration of salinity toxicity in South African crop plants with special reference to maize by Tshivhandekano, Thivhulawi Robert

Other Authors: “…Lewis, O A M…”
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