Articles by Keyword: Landscape Variability

Search results for Landscape Variability

We found 47 results for you
  1. Longer rest periods for intensive rotational grazing limit diet quality of sheep without enhancing environmental benefits

    Longer rest periods for intensive rotational grazing limit diet quality of sheep without enhancing environmental benefits

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    Intensive rotational grazing systems (also called cell grazing, holistic grazing or time-controlled grazing) are often implemented to improve production and environmental outcomes. Over recent years there has been considerable interpretation and adaption of the holistic principles that guide the management...
  2. Changing perceptions of fire management in savanna parks

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Parks are managed to preserve their pristine state. Fire has had a varied role in this, depending on shifting paradigms of savanna functioning. Formerly, an equilibrium theory of functioning prevailed where fire was at first an unavoidable evil, and then...
  3. Spatial variability of two selected soil properties in a semi- arid subcatchment of the Lower Great Fish River

    Spatial variability of two selected soil properties in a semi- arid subcatchment of the Lower Great Fish River

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The variability of the soluble salt content and the textural composition of the soil were investigated in a 28-ha sub-catchment of the Ecca River, a tributary of the Great Fish River. The frequency distribution of the soluble salts in the...
  4. Characterizing the hydraulic properties of a semi-arid catchment by means of sorptivity measurements and scaling theory

    Characterizing the hydraulic properties of a semi-arid catchment by means of sorptivity measurements and scaling theory

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The variability of soil sorptivity within a semi-arid catchment was investigated on a macro- (28 ha) and microscale (16 m2). In the macroscale study, sorptivity was measured at 176 sites using a falling hydraulic head technique. The mean sorptivity of...
  5. The genetic variability of malt quality and related characteristics in grain sorghum

    The genetic variability of malt quality and related characteristics in grain sorghum

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The inheritance of and relationships between diastatic power, seed texture, steep mass, malt mass, dry malt mass, rate of moisture uptake during malting and percentage moisture of malt were analysed by means of a factorial crossing design, which involved the...
  6. Temporal and spatial relations of plant element uptake and yield of a lucerne stand

    Temporal and spatial relations of plant element uptake and yield of a lucerne stand

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    In general, agricultural fields are managed as uniform units, ignoring spatial and temporal relations between plant element uptake and yield. This study was conducted from June 2001 to February 2002 on a two-year-old lucerne stand and explores the spatial relationships...
  7. Spatial variation of soil and plant properties and its effects on the statistical design of a field experiment

    Spatial variation of soil and plant properties and its effects on the statistical design of a field experiment

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The standard procedure in field experimentation is to use a randomized complete block (RCB) design, striving for the most homogeneous conditions as possible among plots in the same block. However, geostatistical concepts dictate that a spatial dependence exists for observations...
  8. Remote sensing and change detection in rangelands

    Remote sensing and change detection in rangelands

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    During the 20 th century, we have witnessed an improvement in the quality of imagery available for rangeland auditing, from the earliest mono-chromatic aerial photographs, followed by the first infra-red images, to the abundance of high resolution, multi-spectral imagery currently...
  9. Brushpiles and dung as rehabilitation patches: effect on soil resources in degraded succulent thicket, Eastern Cape, South Africa

    Brushpiles and dung as rehabilitation patches: effect on soil resources in degraded succulent thicket, Eastern Cape, South Africa

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    A substantial portion of the Thicket Biome in the Eastern Cape has been transformed by overgrazing. An experimental rehabilitation study of degraded succulent thicket was initiated to determine whether increasing the patchiness on the landscape would result in an increase...
  10. Effects of season and frequency of burning on soils and landscape functioning in a moist montane grassland

    Effects of season and frequency of burning on soils and landscape functioning in a moist montane grassland

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    The effects of burning on soil properties and landscape function were investigated in a long-term experiment comparing different burning strategies in a moist montane grassland. Total C, total N, total S, bulk density, plant-available nutrients, and soil acidity were determined...