Lenticel development and discolouration in the fruit of some mango (mangifera indica L.) cultivars

Other Authors: “…Robbertse, P.J. (Petrus Johannes), 1932-…”
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Aspekte van die kiemingsgedrag en fynstruktuur van Encephalartos-stuifmeel (Afrikaans)

Other Authors: “…Robbertse, P.J. (Petrus Johannes), 1932-…”
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Manipulation of flowering period and shoot multiplication in Clivia miniata (Lindley) Regel

Other Authors: “…Robbertse, P.J. (Petrus Johannes), 1932-…”
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Optimization of bulblet production by leaf cuttings in Lachenalia

Other Authors: “…Robbertse, P.J. (Petrus Johannes), 1932-…”
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Screening of avocado rootstock material for tolerance to Phytophthora cinnamomi

Other Authors: “…Robbertse, P.J. (Petrus Johannes), 1932-…”
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Seed germination, tree growth and flowering responses of Moringa Oleifera lam. (horseradish tree) to temperature

Other Authors: “…Robbertse, P.J. (Petrus Johannes), 1932-…”
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Manipulation of avocado (Persea americana Mill.) trees for out of season fruit production

Other Authors: “…Robbertse, P.J. (Petrus Johannes), 1932-…”
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Effect of soil amendments, climate and rootstock on tree performance and fruit quality of 'Valencia' orange used for processing

Other Authors: “…Robbertse, P.J. (Petrus Johannes), 1932-…”
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Irrigation and dryland fruit production: opportunities and constraints faced by small-scale farmers in Venda

Other Authors: “…Robbertse, P.J. (Petrus Johannes), 1932-…”
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Temperature effects on bulb growth and inflorescence development of Lachenalia cv. Ronina

Other Authors: “…Robbertse, P.J. (Petrus Johannes), 1932-…”
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Contributions towards a new classification of Eugenia L. (Myrtaceae) in Southern Africa

Other Authors: “…Robbertse, P.J. (Petrus Johannes), 1932-…”
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Relevance of comparative leaf blade anatomy in taxonomic and functional research on the South African Poaceae.

Other Authors: “…Robbertse, P.J. (Petrus Johannes), 1932-…”
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A Study on the induction of flowering in Lolium multiflorum

Other Authors: “…Robbertse, P.J. (Petrus Johannes), 1932-…”
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A morphological study of the fruit and seed of certain southern African members of the Anacardiaceae

Other Authors: “…Robbertse, P.J. (Petrus Johannes), 1932-…”
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n Numeries-taksomiese evaluering van die takson acacia karoo hayne in Suidelike Afrika

Other Authors: “…Robbertse, P.J. (Petrus Johannes), 1932-…”
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n Ontogenetiese studie van die vrug en saad van Sclerocarya birrea (A. Rich.) Hochst. subspesie caffra (Sond.) Kokwaro

Other Authors: “…Robbertse, P.J. (Petrus Johannes), 1932-…”
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‘n Morfologiese Studie van die Genus Ficus L. In Suidelike Afrika

Other Authors: “…Robbertse, P.J. (Petrus Johannes), 1932-…”
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n Morfologiese ondersoek van Tylosema esculentum (Burch.) Schreiber en Tylosema fassoglense (Schweinf.) Torre en Hillc. in Suidelike Afrika

Other Authors: “…Robbertse, P.J. (Petrus Johannes), 1932-…”
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Studies on Pollination and Fruit Set in Litchi (Litchi Chinensis Sonn.)

Other Authors: “…Robbertse, P.J. (Petrus Johannes), 1932-…”
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'n Embriologiese studie van Suid-Afrikaanse melianthaceae

Other Authors: “…Robbertse, P.J. (Petrus Johannes), 1932-…”
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