Articles by Keyword: Exchangeable Cations

Search results for Exchangeable Cations

We found 14 results for you
  1. The Influence of Site Factors on the Foliar Nutrient Content of <em>Eucalyptus grandis</em> in Natal

    Item type: Journal Article • Journal: South African Forestry Journal
    Although foliar analysis is commonly used to diagnose the nutritional status of trees and their ability to respond to fertilising, it is also a measure of site type and quality. The availability of nutrients in the soil varies with climatic...
  2. Lime and phosphorus effects on the dry matter production of <em>eragrostis curvula</em> on dystrophic clay soils

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    The dry matter yield responses of Eragrostis curvula to P and lime over two seasons on Balmoral and Balgowan soil series in the Natal Mistbelt are discussed. With this work forming part of a study aimed at characterizing P fixation...
  3. Measurement of exchangeable aluminium in soils and clay minerals by isotopic exchange

    Measurement of exchangeable aluminium in soils and clay minerals by isotopic exchange

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Isotopically exchangeable Al was determined in soils and clay minerals by equilibration with 28Al. Best results were obtained with a weak extractant and an equilibration time of eight min. The calculated amount of isotopically exchangeable Al was independent of the...
  4. Die invloed van grond-pH op die ekstraheerbare fosfor, kalium, kalsium en magnesium met bikarbonaat as ekstraheermiddel

    Die invloed van grond-pH op die ekstraheerbare fosfor, kalium, kalsium en magnesium met bikarbonaat as ekstraheermiddel

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Met behulp van grond-pH is Olsen se natriumbikarbonaat- ekstraheerbare fosfor en ammoniumasetaat-ekstraheerbare kalium, kalsium en magnesium met die gewysigde ISFEI- (NH4HCO3 - Na-EDTA - NH4F) ekstraksiemetode vergelyk. Op grond van pH (CaCl2) is die grondmonsters wat in die ondersoek gebruik...
  5. Effects of clay mineralogy and soil sodicity on soil infiltration rate

    Effects of clay mineralogy and soil sodicity on soil infiltration rate

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Crust formation and infiltration rates and their dependence on the exchangeable sodium percentage (ESP) of South African (SA) soils, with kaolinite and illite as the dominant clay minerals, were studied by subjecting them to simulated rain. The final infiltration rate...
  6. Comparison of aluminium, basic cations and acidity in the soil of indigenous forests and pine stands in the southern Cape

    Comparison of aluminium, basic cations and acidity in the soil of indigenous forests and pine stands in the southern Cape

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Litter and topsoil were sampled in plantations of Pinus elliottii and Pinus taeda and in adjacent indigenous forest in three different locations in the southern Cape, to study some of the effects on the soil of the establishment of pine...
  7. Polymer effect on infiltration and erosion of sodic soils

    Polymer effect on infiltration and erosion of sodic soils

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Runoff from irrigated sodic soils is a common phenomenon in arid and semi-arid climates. The effect of a low-charge polysaccharide (LCCP) on infiltration rate (IR) and runoff on two red apedal soils was studied using an irrigation simulator. One was...
  8. A comparison of methods used for the extraction of K in soils of the Western Cape

    A comparison of methods used for the extraction of K in soils of the Western Cape

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    A number of common soil extractants, mainly those used for soil P, were used to extract K from a range of widely differing soils which occur in the Western Cape; the objective being to evaluate the simultaneous determination of P...
  9. Plant nutrient status of soils of the Lusikisiki area, Eastern Cape Province

    Plant nutrient status of soils of the Lusikisiki area, Eastern Cape Province

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The aim of the paper is to Identify major soil plant fertility constraints for 15 soil profiles from the Lusikisiki area of the Eastern Cape Province of South Africa. Phosphorus levels were very low, with 87% of the A horizons...
  10. Multivariate analysis of selected allied chemical properties of soils close to an abandoned manganese mine

    Multivariate analysis of selected allied chemical properties of soils close to an abandoned manganese mine

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    This study aimed at understanding the statistical relationships between base saturation percent (BSP), cation exchange capacity (CEC), pH(water) and electrical conductivity (EC) in soils within close proximity to the abandoned Kgwakgwe Mn oxide ore mine, Botswana. Four hundred soil samples...