Articles by Keyword: Drought

Search results for Drought

We found 64 results for you
  1. Analysis of Stable Isotopes of Xylem Water from Plantation Trees in E. Transvaal and Zululand Indicate they Utilised Ground water During Drought of 1992

    Item type: Journal Article • Journal: South African Forestry Journal
    We investigated the stable isotopic signature of xylem sap of mature plantation trees and the associated ground water at sites in Zululand and E. Transvaal. The survey took place mainly during the drought of 1992. Results indicated a range of...
  2. 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...
  3. Conservative stocking or maximum profit: A grazing management dilemma?

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Swards in the False Thornveld of the Eastern Cape are generally stocked considerably in excess of the rate currently recommended for maximised production on a sustained basis. Economic analysis of the relationship between stocking rate and production per ha reveals...
  4. 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...
  5. Korttermyn invloed van strawwe droogte op veldtoestand en waterverbruiksdoeltreffendheid van grasveld in die sentrale Oranje‐Vrystaat

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Short‐term effect of severe drought on veld condition and water use efficiency of grassveld in the central Orange Free State. The impact of an intensive drought (1982/1983 and 1983/84‐growing seasons) on botanical composition, basal cover, mortality of grazing plants and...
  6. Assessment of recent drought severity for natural grassland at three locations

    Assessment of recent drought severity for natural grassland at three locations

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The relative severity of drought in natural grassland during three growing seasons was analyzed for three South African weather stations. Computer simulation of grassland water use, based upon weather records, was used to quantify drought and to compare the conditions...
  7. Leaf water retention of excised leaves as a measure of drought resistance in grain sorghum (<em>Sorghum bicolor</em> L. Moench) genotypes

    Leaf water retention of excised leaves as a measure of drought resistance in grain sorghum (<em>Sorghum bicolor</em> L. Moench) genotypes

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The objective of these experiments was to evaluate the usefulness of the excised leaf water retention capability (ELWRC) technique for screening grain sorghum genotypes for drought resistance. Seven genotypes were planted in a randomized block consisting of four replications. The...
  8. 'n Vergelyking van koringkultivars ten opsigte van droogteverdraagsaamheid

    'n Vergelyking van koringkultivars ten opsigte van droogteverdraagsaamheid

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    'n Proef met vyf koringkultivars en twee vogpeile (50 en 80% van veldwaterkapasiteit) is in 'n glashuis uitgevoer. Kultivarverskiile in droëmateriaalakkumulasie is verkry by die lae vogpeil. Gamtoos het die grootste blaaroppervlakte en blaarmassa gehad by die vlagblaarstadium en uiteindelik...
  9. Changes in percentage moisture loss of excised leaves of seven field-grown grain sorghum genotypes

    Changes in percentage moisture loss of excised leaves of seven field-grown grain sorghum genotypes

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The objectives of these experiments were to study the seasonal and diurnal changes in percentage moisture loss (PML) and correlated characteristics of excised leaves. Seven grain sorghum genotypes were planted in a randomized block design and their PML and the...
  10. The inheritance of percentage moisture loss in sorghum leaves

    The inheritance of percentage moisture loss in sorghum leaves

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The inheritance of drought resistance and agronomic characteristics of field-grown sorghum plants was determined. High heritabilities were recorded for each characteristic. The genetic differences of percentage moisture loss were due to genes exhibiting incomplete dominance. The agronomic characteristics of plant...