Browsing Natural and Agricultural Sciences by Title
Now showing items 1883-1902 of 2739
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'n Geografiese ondersoek na die landboukleinhoewes in die gebied Randfontein-Welverdiend
(North-West University (South Africa), 1954)"No abstract" -
'n Kwantitatiewe en kwalitatiewe ondersoek van die bentos in Barberspan
(North-West University (South Africa), 1967)"Abstract not copied" -
'n Kwantitatiewe ondersoek na die onderlinge verwantskap tussen enkele fisies-geografiese veranderlikes in die opvanggebied van die Krokodilrivier, wes van Schagen
(North-West University (South Africa), 1973)The catchment area of the Crocodile river, west of Schagen in the Eastern Transvaal was studied in a Geographical sense. A quantitative approach from the view point of Physical Geography, especially Geomorphology, was ... -
'n Landbou-geografiese studie van drie boerderygemeenskappe in die Koppiesdistrik [O.V.S.]
(North-West University (South Africa), 1974)"No abstract" -
'n Mikrobiologiese studie van die saadklewende mikroörganismes van Striga lutea [Lour.] met die oog op die moontlike aseptiese kultivering van hierdie angiospermiese parasiet
(North-West University (South Africa), 1960)"Abstract not copied" -
'n Nuwe toetsmedium vir eko-toksikologiese studies met Eisenia fetida
(North-West University (South Africa), 1984)The need for a defined test-medium to determine the sublethal effects of pesticides on earthworms, was felt after it became apparent that the materials used unto now, were of a varying and un-reprodusable nature. The aim ... -
'n Ondersoek na die bakteriologiese kwaliteit van die water in die Tugelarivier en die Drie Riviere-gebied in Natal
(North-West University (South Africa), 1973)Sedert 1953 word rivieropnarnes in Natal deur die Nasionale Instituut vir Waternavorsing van die WNNR narnens die Dorpsen Streeksbeplanningskomrnissie gemaak. Die r esultate van hierdie opnarnes word vir langtermynbeplanni ... -
'n Ondersoek na die ekologiese voedselstruktuur van sekere visspesies in Loskopdam
(North-West University (South Africa), 1971)"No abstract" -
'n Ondersoek na die gevorderde suiwering van konvensionele rioolwerke-uitvloeisels vir drinkdoeleindes
(North-West University (South Africa), 1971)A report is given of tests carried out in Windhoek, S. W.A. and Pretoria under the project leadership of the author. Intensive studies were conducted on the technical and economic feasibility of reclamining sewage works ... -
'n Ondersoek na die herhaalbaarheid van die hidrogenasie van 'n Waterbergsteenkool
(North-West University (South Africa), 1972)"Abstract not copied" -
'n Ondersoek na die invloed van 8-hidroksikinoliensulfaat en n-6-bensielaminopurien op enkele aspekte van veroudering by angelierblomme
(North-West University (South Africa), 1977)The effect of N-6-benzylaminopurine (BAP), 8-hydroxyquinoline sulphate (HQS) and a BAP/HQS mixture on the display life and external appearance of cut carnation flowers (Dianthus caryophyl lus L. cultivar White Sim) was ... -
'n Ondersoek na die invloed van verskillende kultuurtoestande op die sporulasie, spoormorfologie en uitwendige spoorultrastruktuur van twee nuwe swamsoorte
(North-West University (South Africa), 1971)"Abstract not copied" -
'n Ondersoek na die moontlike ontwikkeling van 'n betroubare biotiese indeks vir die bepaling van rivierwaterbesoedeling in Natal
(North-West University (South Africa), 1969)"No abstract" -
'n Ondersoek na die samestelling en belang van Achyranthes aspera L. as geneeskragtige plant
(North-West University (South Africa), 1960)"Abstract not copied" -
'n Ondersoek na die suiwering van 'n afvalwateruitvloeisel in 'n organiese nywerheid
(North-West University (South Africa), 1974)Abstract not copied" -
'n Ondersoek na die veredeling van laegraadse mangaanerts met besondere verwysing na die reduseerbaarheid
(North-West University (South Africa), 1970)The possibility of upgrading low grade manganese ore from Mamatwan was investigated . The main purpose of the ivestigation involved the removal of lime and silica from the ore (be it before or after the partial reduction ... -
'n Ondersoek na die verspreiding en taksonomie van Microchaetinae [Oligochaeta] in Suid-Afrika
(North-West University (South Africa), 1978)In this study it has been attempted to give a comprehensive survey of the geographic distribution and the taxonomic status of all the South African species of the genus Microchaetus . An effort has been made to clarify ... -
'n Ondersoek na die verspreiding van sekere Ephemeroptera [Insecta] in die Komatirivierstelsel, Oos-Transvaal
(North-West University (South Africa), 1968)"No abstract" -
'n Ondersoek na die verwydering van swaarmetale uit 'n mynuitvloeisel
(North-West University (South Africa), 1975)The effluent from an uranium extraction plant contains dissolved metals, the most abundant being manganese (J000 ppm), aluminium (2600 ppm) and iron (2200 ppm). Large quantities of these metals are lost in the present ... -
'n Ondersoek na die wisselwerking tussen sommige ekologiese faktore en die bevolkings van Simulium damnosum Theobald en Simulium nigritarsis coquillet [Simuliidae : Diptera] in die Vaalrivier by Parys
(North-West University (South Africa), 1972)1. Simuliede is 'n ernstige plaag van diere dwarsoor die wereld, en dit tree in Suid-Afrika steeds meer op die voorgrond. 2. Ondersoek is in Suid-Afrika by die Vaalrivier ingestel na die aktiwiteit en getalsdigtheid van ...
