Die invloed van 'n nagbreek op groeipuntontwikkeling en verwante opbrengsfaktore van Virginiese tabak (Nicotiana Tabacum L.) onder koue, kort fotoperiodes

De Kock, Johannes Nicolaas (1987)

Proefskrif (M. Sc. Agric.) -- Universiteit van Stellenbosch, 1987.

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Thesis

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