Articles by Keyword: Aridity Index

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  1. Verwantskap tussen organiese materiaalinhoud van sekere onversteurde bogronde, grondeienskappe en klimaatsdata in Suid-Afrika

    Verwantskap tussen organiese materiaalinhoud van sekere onversteurde bogronde, grondeienskappe en klimaatsdata in Suid-Afrika

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Die doel met die ondersoek was om vas te stel of die organiese materiaalinhoud van onversteurde ortiese A-horisonte, wat deur rooi apedale, geelbruin apedale en sagte plintiese B-horisonte onderlê word, vanaf beskikbare of maklik meetbare grondeienskappe en klimaatsdata bereken kan...
  2. Effek van bewerking op die organiese materiaalinhoud van geselekteerde droëlandgronde in Suid-Afrika

    Effek van bewerking op die organiese materiaalinhoud van geselekteerde droëlandgronde in Suid-Afrika

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Die doel van die ondersoek was om (1) die effek van bewerking op die organiese materiaalinhoud van gronde te kwantifiseer indien onversteurde gronde as verwysing dien; (2) die verband tussen bewerkingstyd en die afname in organiese materiaal te kry en...
  3. Effek van bewerkingstyd op die afname van totale swawel in geselekteerde Suid-Afrikaanse gronde

    Effek van bewerkingstyd op die afname van totale swawel in geselekteerde Suid-Afrikaanse gronde

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    'n Afname van 4–70% in die totale S van bogronde as gevolg van bewerking het die vraag laat ontstaan hoe hierdie verlies verband hou met die periode van bewerking en of so 'n verwantskap tussen ekotope verskil. Bewerkte en nabygeleë...
  4. A global assessment of Holistic Planned Grazing™ compared with season-long, continuous grazing: meta-analysis findings

    A global assessment of Holistic Planned Grazing™ compared with season-long, continuous grazing: meta-analysis findings

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    It has been claimed that Holistic Planned Grazing™ (HPG), a type of rotational grazing, can increase productivity in rangelands and reverse climate change while doubling the stocking rate, mainly through the impact of densely bunched animals on primary production. Previous...
  5. Impact of Wood Quality Assessments on Future Fibre Resources in the Pulp and Paper-making Industry

    Item type: Journal Article • Journal: South African Forestry Journal
    Recent evidence from research in Europe has indicated that individual trees can be sampled for their pulping properties by the removal of small quantities (5–50 g) of wood at about breast height (1,3 m above ground). Work began at Sappi's...
  6. Use of Ecological Site Classification in the Prediction of Forest Productivity and Response to Fertilisation

    Item type: Journal Article • Journal: South African Forestry Journal
    The principals of biogeoclimatic ecosystem classification were used to stratify sites supporting immature stands of coastal Douglas-fir. The resulting strata were shown to represent unique segments of regional gradients of available soil moisture and nutrients. Regression models indicated strong relationships...
  7. A mathematical model for assessing the influence of stocking rate on the incidence of droughts and for estimating the optimal stocking rates<sup>1</sup>

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    The Putu 11 simulation model was used to simulate veld production for each of 47 years, using weather input data and soil properties of a site at Glen. Grassland drought was defined as that condition encountered when 100 kg/ha or...
  8. A comparison of five methods for assessing veld condition in the natal midlands

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Site rankings obtained from five methods of scoring veld condition in the highland sourveld and the moist tall grassveld of the Natal Midlands were correlated with rankings from methods of multivariate analysis. With few exceptions, all methods gave rankings which...
  9. The development of veld assessment in the northern Transvaal savanna I. Red Turfveld

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Grazing‐induced gradients in pasture species composition were characterized for the red turfveld of the Northern Transvaal savanna. A proposed classification of pasture species response to grazing was developed and the influence of state variables and driving forces other than grazing...
  10. Interrelationships between veld condition, herbage mass, stocking rate and animal performance in the Tall Grassland of Natal

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Grazing trials were established at three sites in the Tall Grassveld of Natal. The objectives were to determine (a) patterns in herbage mass in relation to veld condition, stocking rate and commencement of spring grazing, and (b) animal performance in...