Differences in response between nitrate- and ammonium-fed maize to salinity stress and its amelioration by potassium von Tshivhandekano, T.R., Lewis, O.A.M.

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The Influence of nutrient nitrogen source on the growth and productivity of sunflower (Helianthus annuus var. Dwarf Sungold) von Kaiser, J.J., Lewis, O.A.M.

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The Influence of Nitrate and Ammonium Nutrition on the Growth of Wheat (Triticum aestivum) and Maize (Zea mays) Plants von Cramer, M.D., Lewis, O.A.M.

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Growth of calcicole and calcifuge Agulhas Plain Proteaceae on contrasting soil types, under glasshouse conditions von Newton, I.P., Cowling, R.M., Lewis, O.A.M.

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Environmental control of photosynthetic gas exchange characteristics of fynbos species representing three growth forms von van der Heyden, F., Lewis, O.A.M.

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Seasonal variation in photosynthetic capacity with respect to plant water status of five species of the mediterranean climate region of South Africa von van der Heyden, F., Lewis, O.A.M.

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The assimilation of ammonium by barley roots von Lewis, O.A.M. (Cape Town Univ., Rondebosch (South Africa). Botany Dept.), Chadwick, S, Withers, J

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The influence of $NO_3^ - $ and $NH_4^ + $ nutrition on the carbon and nitrogen partitioning characteristics of wheat (Triticum aestivum L.) and maize (Zea mays L.) plants von CRAMER, M.D., LEWIS, O.A.M.

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Inorganic carbon fixation and metabolism in maize roots as affected by nitrate and ammonium nutrition von Cramer, M.D, Lewis, O.A.M, Lips, S.H

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Careers for botanists in South Africa von Lewis, O.A.M.

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Effect of nitrogen source on growth response to salinity stress in maize and wheat von Lewis, O.A.M, Leidi, E.O, Lips, S.H

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Soil nitrogen and the role of fire as a mineralizing agent in a South African coastal fynbos ecosystem von Stock, W.D, Lewis, O.A.M

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Nitrate reductase and flutamine synthetase activity in leaves and roots of nitrate-fed Helianthus annus L von Kaiser, J.J, Lewis, O.A.M

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A comparison of a chemical and biological method of protein evalution: the effect of heat treatment on the protein value of pork von Lewis, O.A.M.

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The inhibition of ammonium uptake by nitrate in wheat von Deignan, M.T, Lewis, O.A.M

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Atmospheric input of nitrogen to a coastal fynbos ecosystem of the south-western Cape Province, South Africa von Stock, W.D., Lewis, O.A.M.

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Nitrogen assimilation in barley (Hordeum vulgare L. cv. Mazurka) in response to nitrate and ammonium nutrition von Lewis, O.A.M, James, D.M, Hewitt, E.J

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Effect of nitrogen feeding source on the supply of nitrogen from root to shoot and the site of nitrogen assimilation in maize (Zea mays L. cv. R201) von Murphy, A.T, Lewis, O.A.M

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Soil nitrogen mineralization in a coastal fynbos succession von STOCK, W.D., LEWIS, O.A.M., ALLSOPP, N.

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Seasonal allocation of dry mass and nitrogen in a fynbos endemic Restionaceae species Thamnochortus punctatus Pill von Stock, W.D, Sommerville, J.E.M, Lewis, O.A.M

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