Articles by Author: Marlise E Joubert

Search results for Marlise E Joubert

We found 154 results for you
  1. Measurement of exchangeable aluminium in soils and clay minerals by isotopic exchange

    Measurement of exchangeable aluminium in soils and clay minerals by isotopic exchange

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Isotopically exchangeable Al was determined in soils and clay minerals by equilibration with 28Al. Best results were obtained with a weak extractant and an equilibration time of eight min. The calculated amount of isotopically exchangeable Al was independent of the...
  2. Effects of soil surface management practices on soil and tree parameters in a ‘Cripps Pink’/M7 apple orchard 1. Mineral nutrition

    Effects of soil surface management practices on soil and tree parameters in a ‘Cripps Pink’/M7 apple orchard 1. Mineral nutrition

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Effects on soil, leaf and fruit element concentrations of organic (compost, straw mulch and hand weeding) and integrated (inorganic fertilisers and herbicide usage; IP) soil surface management practices in the tree rows, in combination with weed covers, cover crops and...
  3. Effects of soil surface management practices on soil and tree parameters in a ‘Cripps Pink’/M7 apple orchard 2. Tree performance and root distribution

    Effects of soil surface management practices on soil and tree parameters in a ‘Cripps Pink’/M7 apple orchard 2. Tree performance and root distribution

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Effects of integrated production (IP) and organic-acceptable soil surface management practices were investigated in a ‘Cripps Pink’/M7 apple orchard in the Elgin area, South Africa. Work row treatments included cover crops, weeds and straw mulch. In the IP tree rows,...
  4. Commercial Forestry on Signal Hill and Lion's Head, Cape Town

    Item type: Journal Article • Journal: South African Forestry Journal
    The history of afforestation with alien tree species on Signal Hill and Lion's Head, which form part of the Table Mountain Nature Reserve, Cape Town, was reconstructed. The natural vegetation comprises mostly West Coast Renosterveld which is considered the most...
  5. Vestigingsmetodes vir <em>osteospermum sinuatum</em> in die veld van die Klein Karoo

    Vestigingsmetodes vir <em>osteospermum sinuatum</em> in die veld van die Klein Karoo

    Osteospermum sinuatum of bitou is ‘n smaaklike inheemse meerjarige karoobossie wat feitlik uitgeroei is, deur oorbeweiding in die veld, maar wat suksesvol hervestig kan word van saad. Die resultate van ‘n vestigingsproef op die Worcesterse Veldreservaat het getoon dat geen...
  6. Die invloed van verskillende veedigthede teen dieselfde veebeladings op die produksie van jong groeiende ossies op oshonagrasveld

    Die invloed van verskillende veedigthede teen dieselfde veebeladings op die produksie van jong groeiende ossies op oshonagrasveld

    ‘n Weidingsproef is uitgevoer in Oshonagrasveld in Ovambo om vas te stel wat die invloed van verskillende veedigt‐hede teen konstante veebeladings op die produksie van jong ossies is.
  7. Die invloed van snoei op koolsuurg asabsorpsie en koolhidraatinhoud van <em>ehrharta calysina</em> en <em>osteospermumsinuatum</em>

    Die invloed van snoei op koolsuurg asabsorpsie en koolhidraatinhoud van <em>ehrharta calysina</em> en <em>osteospermumsinuatum</em>

    Verwydering van 80% van die bogrondse massa (op ‘n varsmassa basis) van Ehrharta calycina (gras) en Osteospermum sinuatum (bossie) in onderskeidelik die vlagblaar en blomknopstadium het ‘n skerp daling in die totale netto CO2 absorpsie van die plante tot vegolg...