Articles by Keyword: Cation Exchange Capacity

Search results for Cation Exchange Capacity

We found 134 results for you
  1. Relations between soil factors and herbage yields of natural grassland on sandy soils in the south‐eastern Transvaal

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Forty systematically‐placed observation points were established in a 1.5‐ha area of floristically unifoim veld in which productivity varied spatially. At each point grass yields were determined by harvesting quadrats at eight‐week intervals during the growing season, and the volumetric water...
  2. Relationship between cation exchange capacity, clay content and water retention of Highveld soils

    Relationship between cation exchange capacity, clay content and water retention of Highveld soils

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Water in the soil is held by capillary and adsorption forces. These forces are mainly a function of clay content and mineralogy. To neglect the influence of clay mineralogy when estimating the water-holding properties of soil, implies that only a...
  3. A proposed mechanism for the volatilization of ammonia from fertilized neutral to alkaline soils

    A proposed mechanism for the volatilization of ammonia from fertilized neutral to alkaline soils

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Ammonia volatilization from five soils, ranging in clay content from 7,6 to 49,9%, were determined after pH values of the soils were adjusted to 8,0. Ammonium sulphate, limestone ammonium nitrate, urea, monoammonium phosphate and diammonium phosphate were applied on the...
  4. Kleimineralogie, katioonuitruilkapasiteit en waterhouvermoë van grondvorms in die Hoëveldstreek

    Kleimineralogie, katioonuitruilkapasiteit en waterhouvermoë van grondvorms in die Hoëveldstreek

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Kleimineralogiese data vir 12 grondvorms, wat algemeen in die Hoëveldstreek voorkom, is ondersoek. Die persentasie monsters waarin 'n bepaalde kleimineraal voorkom, is bereken. Daaruit is dit duidelik dat smektiet algemeen in gronde van die Arcadia-, Bonheim, en Rensburgvorms voorkom, maar...
  5. Comparison of methods for estimating cation exchange capacity of orchard soils

    Comparison of methods for estimating cation exchange capacity of orchard soils

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Various methods for estimating soil cation exchange capacity (CEC) were compared. CEC obtained by the sum of extractable cations and the Adams-Evans buffer method were considerably higher than those obtained by saturation and displacement of either NH4 + or Na+...
  6. The effect of lime, KCl and parent material on the cation exchange capacity of some acid subsoils of the western Cape

    The effect of lime, KCl and parent material on the cation exchange capacity of some acid subsoils of the western Cape

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Cation exchange capacity (CEC) values obtained by 22Na dilution for a number of mineralogically diverse acid subsoils reflected positive responses to lime and to treatment with KCl such that: CEC (unlimed, no KCl) < (unlimed + KCl) < (limed, no...
  7. Die verwantskap tussen maksimum nitrifikasietempo en relevante eienskappe van gronde vanaf die sentrale besproeiingsgebiede in Suid-Afrika

    Die verwantskap tussen maksimum nitrifikasietempo en relevante eienskappe van gronde vanaf die sentrale besproeiingsgebiede in Suid-Afrika

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Die oogmerk van die studie was om die verwantskappe tussen maksimum nitrifikasietempo (Kmaks) en relevante eienskappe van die gronde vanaf die sentrale besproeiingsgebiede uit te wys. Die verloop van nitrifikasie is in agt gronde, afkomstig van die gebiede, gemonitor na...
  8. Urease-aktiwiteite in gronde van die sentrale besproeiingsgebiede in Suid-Afrika

    Urease-aktiwiteite in gronde van die sentrale besproeiingsgebiede in Suid-Afrika

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Die oogmerk met die studie was om die omvang van urease-aktiwiteite in die besproeide gronde vas te stel en watter grondparameters dit beïnvloed. Die verloop van hidrolise is in agt gronde, afkomstig van die sentrale besproeiingsgebiede, gemonitor na toediening van...
  9. Ceramic suction samplers: A reliable method for extracting soil solutions for analysis

    Ceramic suction samplers: A reliable method for extracting soil solutions for analysis

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Ceramic samplers are used to extract soil solutions at different depths from the soil profile for chemical analysis. The advantage of this method is that samples can be taken at any time provided that the soil water potential is high...
  10. Selected soil properties as indicators of soil water regime in the Cathedral Peak VI catchment of KwaZulu-Natal, South Africa

    Selected soil properties as indicators of soil water regime in the Cathedral Peak VI catchment of KwaZulu-Natal, South Africa

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The morphological features and physicochemical properties of 14 soil profiles, representing the major soil types, were studied in the Cathedral Peak VI catchment of KwaZulu-Natal, South Africa. The soils are characterised by a high organic carbon content in the topsoil,...