Articles by Author: Jj Le Roux

Search results for Jj Le Roux

We found 200 results for you
  1. Die Gebruik van die Kaapse Fynbos vir Weiding en die Probleme wat dit Skep

    Item type: Journal Article • Journal: South African Forestry Journal
    A land-use study in the Riviersonderend Mountain Catchment Area was undertaken to determine the effect of grazing on the fynbos vegetation. Alternative grazing systems were also investigated. It was clear that burning of the veld combined with grazing shortly thereafter...
  2. Analysis of Fires in Privately-Owned Plantations in the Republic of South Africa (01.04.1979 to 31.03.1985)

    Item type: Journal Article • Journal: South African Forestry Journal
    An analysis is presented of 1 596 fire reports submitted voluntarily during the period 01.04.1979 to 31.03.1985 in respect of 201 private plantations situated in the Transvaal (132 plantations) and Natal (67 plantations). Of these plantations 155 were insured and...
  3. Diseases of Black Wattle in South Africa—A Review

    Item type: Journal Article • Journal: South African Forestry Journal
    Black wattle (Acacia mearnsii) is an economically important plantation tree in many parts of the world. In South Africa it is mainly planted for the production of tannins and high quality pulp. Wattle trees are affected by various diseases, some...
  4. Polygonal plot method for estimating the canopy‐spread cover of shrubs

    Polygonal plot method for estimating the canopy‐spread cover of shrubs

    An optical method for measuring canopy‐spread cover of shrubs is described by means of an illustrated example. Boundaries of plots are hypothetical lines joining the centres of wholly visible shrubs or groups of shrubs surrounding the observation point. Plots are...
  5. The grazing capacity of the plains in the Etosha national park

    The grazing capacity of the plains in the Etosha national park

    A series of elementary trials was conducted to study the grazing capacity of the major plains areas in the Etosha National Park. The yield data were compared with rainfall and game census data. The results suggest that the Chudop‐Twee Palms...
  6. Effects of certain burning and cutting treatments and fluctuating annual rainfall on seasonal variation in grassland basal cover

    Effects of certain burning and cutting treatments and fluctuating annual rainfall on seasonal variation in grassland basal cover

    The variation in total basal cover from one time of year to another was investigated by means of the bridge and wheel‐point methods over a period of seven years. Treatments were: a control plot, one cut annually in winter and...