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  1. EFFECT OF PHOSPHATE CONCENTRATION ON THE FINE STRUCTURE OF THE CYANOBACTERIUM, <em>MICROCYSTIS AERUGINOSA</em> KÜTZ. EMEND. ELENKIN

    EFFECT OF PHOSPHATE CONCENTRATION ON THE FINE STRUCTURE OF THE CYANOBACTERIUM, MICROCYSTIS AERUGINOSA KÜTZ. EMEND. ELENKIN

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: DerylJ. Barlow --- , South Africa W. L.J. van Rensburl --- , South Africa A. J.H. Pieterse --- , South Africa J.N. Eloff --- , South Africa
    Microcystis aeruginosa toxic strain UV-006 stored a fixed amount of polyphosphate in spherical granules located in the centroplasm. Twenty four hours of phosphate starvation induced use of stored polyphosphate, manifested by reduction in granule numbers. Reintroduction of 2, 4 or...
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  2. Evaluation of the effects of phosphorus and nitrogen source on aerial and subsoil parameters of maize (<em>Zea mays</em> L.) during early growth and development

    Evaluation of the effects of phosphorus and nitrogen source on aerial and subsoil parameters of maize (Zea mays L.) during early growth and development

    Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Pieter-Ernst Coetzee --- Department of Soil, Crop and Climate Sciences, South Africa Gert M Ceronio --- Department of Soil, Crop and Climate Sciences, South Africa Chris C du Preez --- Department of Soil, Crop and Climate Sciences, South Africa
    Understanding the nutrient requirements of maize is especially important during early vegetative growth and development, particularly when produced on highly weathered soils with low organic matter contents. Therefore, the growth response of maize to different nitrogen (N) sources viz. limestone...
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  3. Effect of phosphorus and nitrogen sources on essential nutrient concentration and uptake by maize (<em>Zea mays</em> L.) during early growth and development

    Effect of phosphorus and nitrogen sources on essential nutrient concentration and uptake by maize (Zea mays L.) during early growth and development

    Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Pieter-Ernst Coetzee --- Department of Soil, Crop and Climate Sciences, South Africa Gert M Ceronio --- Department of Soil, Crop and Climate Sciences, South Africa Chris C du Preez --- Department of Soil, Crop and Climate Sciences, South Africa
    In South Africa, maize is often produced on highly weathered soils with low organic matter contents. These soils are unable to supply sufficient nitrogen (N) and phosphorus (P) for sustainable maize production, resulting in the use of fertiliser sources containing...
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