Articles by Keyword: Sap Flow

Search results for Sap Flow

We found 61 results for you
  1. Financial Decision Criteria and Real Price Changes

    Item type: Journal Article • Journal: South African Forestry Journal
    General price indices such as the Consumer Price Index (CPI) or the Production Price Index (PPI) represent the weighted average of prices of a large number of goods and services. Such price indices therefore cannot accurately measure the changes in...
  2. Land Valuation with a Limited Planning Horizon

    Item type: Journal Article • Journal: South African Forestry Journal
    The forestry industry in South Africa operates within a dynamic environment. Rotations are relatively short, land use conversion takes place regularly and company ownership changes frequently. Foresters in the private sector are therefore reluctant to use Land Expectation Value with...
  3. An automated colorimetric method for the determination of dicyandiamide in 1.0 M KCI soil extracts

    An automated colorimetric method for the determination of dicyandiamide in 1.0 M KCI soil extracts

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The nitrification inhibitor dicyandiamide (cyanoguanidine, didin or DCD) reacts with 1-naphthol and diacetyl to form a red complex which measures spectrophotometrically at 540 nm. An automated analytical procedure was developed to determine DCD in soils extracted with 1.0 M KCI...
  4. Grondgeassosieerde, lineêre plantegroeipatrone in die Warmbadomgewing van die Limpopo-provinsie van Suid-Afrika

    Grondgeassosieerde, lineêre plantegroeipatrone in die Warmbadomgewing van die Limpopo-provinsie van Suid-Afrika

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Lineêre mikroreliëfverskynsels wat op lugfoto's soos vingerafdrukpatrone vertoon en bestaande uit boomryke kruine en grasryke trôe is op die voethang van die Baviaansberg, Warmbadomgewing (Suid-Afrika) beskryf. Vir die doel om die oorsprong van die verskynsels te verklaar is van 'n...
  5. VARIABILITY IN THE INVERTEBRATE FAUNA OF AN INTERMITTENT STREAM OVER THREE CONSECUTIVE MIDSUMMER PERIODS

    VARIABILITY IN THE INVERTEBRATE FAUNA OF AN INTERMITTENT STREAM OVER THREE CONSECUTIVE MIDSUMMER PERIODS

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    Non-perennial rivers in semi-arid regions are exposed to unpredictable and highly variable rainfall and hydrology which can have considerable effects on faunal organisation at different scales. Spatial and temporal dynamics in the aquatic invertebrate fauna of an aseasonal intermittent river...
  6. A PRELIMINARY BIOCHEMICAL GENETIC STIJDY OF TWO POPULATIONS OF <em>LITHOGNATHUS AURETI</em> (PERCIFORMES: SPARIDAE)

    A PRELIMINARY BIOCHEMICAL GENETIC STIJDY OF TWO POPULATIONS OF <em>LITHOGNATHUS AURETI</em> (PERCIFORMES: SPARIDAE)

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    Two populations of Lithognathus aureti were electrophoretically analysed to determine the extent of genetic divergence between, and variation within them. Gene products of 35 protein coding loci showed no fixed allele differences between these populations. However, significant genotypic differentiation between...
  7. A REVIEW OF THE MACROBENTHIC FAUNA OF THE MHLATHUZE ESTUARY: SETTING THE ECOLOGICAL RESERVE

    A REVIEW OF THE MACROBENTHIC FAUNA OF THE MHLATHUZE ESTUARY: SETTING THE ECOLOGICAL RESERVE

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    This paper reviews historical and current ecological information on macrobenthos from the Mhlathuze Estuary before and after development of the Richards Bay Harbour. The fauna is described in terms of the potential influence of a change in freshwater inflow to...
  8. The minimum required yield for profitable sawtimber production from <em>Pin us patula</em> in the escarpment area of Mpumalanga

    The minimum required yield for profitable sawtimber production from <em>Pin us patula</em> in the escarpment area of Mpumalanga

    Item type: Journal Article • Journal: The Southern African Forestry Journal
    In a recent study (1998) the minimum required yield for profitable sawtimber production from Pinus patula in the escarpment area of Mpumalanga was established. Net Present Value was used as financial profitability criterion. All cost components were 1996 costs (the...
  9. Fluid Dynamics of Parallel Plates Viscometer: a Case Study of Methods Of Series Summation

    Fluid Dynamics of Parallel Plates Viscometer: a Case Study of Methods Of Series Summation

    Item type: Journal Article • Journal: Quaestiones Mathematicae
    The fluid dynamics of parallel plates viscometer is investigated mathematically using both the Navier-Stokes and continuity equations for an incompressible viscous fluid. The problem admits similarity solutions, thereby reducing the unsteady Navier-Stokes equations to a parameter dependent fourth order nonlinear...
  10. On boundary layer flow of a Sisko fluid over a stretching sheet

    On boundary layer flow of a Sisko fluid over a stretching sheet

    Item type: Journal Article • Journal: Quaestiones Mathematicae
    In this paper, the steady boundary layer flow of a non-Newtonian fluid over a nonlinear stretching sheet is investigated. The Sisko fluid model, which is combination of power-law and Newtonian fluids in which the fluid may exhibit shear thinning/thickening behaviors,...