Articles by Keyword: Particle Size

Search results for Particle Size

We found 154 results for you
  1. The effect of particle-size distribution on the suitability of sandy soils for sports fields

    The effect of particle-size distribution on the suitability of sandy soils for sports fields

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The compaction of the topsoil layer of sports fields can modify soil properties such as permeability, resistance to root penetration, aeration and water-holding capacity. The feasibility of predicting these properties from particle size distribution parameters of sandy soils was investigated...
  2. Water retentivity of some South African soils in relation to particle size criteria and bulk density

    Water retentivity of some South African soils in relation to particle size criteria and bulk density

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Retentivity data for 409 South African soils were obtained from several sources. Water retained at matric potential values of 0, −1, −3, −10, −30, −100, −500 and −1500 kPa was determined from the retentivity curve for each soil core. Retentivity...
  3. Deriving a grain hardness calibration for Southern and Western Cape ground wheat samples by means of the particle size index (PSI) method and Fourier transform near infrared (FT-NIR) spectroscopy

    Deriving a grain hardness calibration for Southern and Western Cape ground wheat samples by means of the particle size index (PSI) method and Fourier transform near infrared (FT-NIR) spectroscopy

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The bread wheat hardness scenario among the Southern and Western Cape cultivars was investigated by deriving a FT-NIR hardness calibration for 198 ground bread wheat samples and using the particle size index (PSI) test as referencê method. Particle size index...
  4. Evaluation of sorghum inbred lines for milling quality

    Evaluation of sorghum inbred lines for milling quality

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Fourteen sorghum inbred lines and one sorghum variety were evaluated for qualitative parameters relating to milling quality. Grain hardness, flour yield, flour particle size and alkali water retention capacity criteria were measured. These quality criteria directly influence acceptability of newly...
  5. Relationships between soil particle size fractions and infiltrability

    Relationships between soil particle size fractions and infiltrability

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The influence of particle size fractions on infiltrability was investigated in soils sampled across Namibia and western South Africa. Infiltrability was determined using a laboratory technique calibrated with rainfall simulation, which measures the passage of a suspension of soil particles...
  6. Infiltrability in soils from south-western Africa: effects of texture, electrical conductivity and exchangeable sodium percentage

    Infiltrability in soils from south-western Africa: effects of texture, electrical conductivity and exchangeable sodium percentage

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The effects of particle size, electrical conductivity (EC) and exchangeable sodium percentage (ESP) on infiltra-bility were investigated in 35 soils from Namibia and western South Africa. Samples were grouped as follows: sand (5–9% clay + silt), loamy sand (16–20%) and...
  7. DISTINGUISHING SUB-ENVIRONMENTS OF SEDIMENT DEPOSITION IN RESERVOIRS USING PARTICLE SIZE DISTRIBUTION PARAMETERS

    DISTINGUISHING SUB-ENVIRONMENTS OF SEDIMENT DEPOSITION IN RESERVOIRS USING PARTICLE SIZE DISTRIBUTION PARAMETERS

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    The deposition of sediment and the distribution of sediment sizes in impoundments is related to the hydraulic mechanisms of the lacustrine or reservoir environment. Granulometric parameters of sediments can be particularly sensitive indicators of the hydraulic environments occuring in different...
  8. Characteristics and management options of crusting soils in a smallholder farming area of the Zambezi metamorphic belt in northern Zimbabwe

    Characteristics and management options of crusting soils in a smallholder farming area of the Zambezi metamorphic belt in northern Zimbabwe

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Crusting and surface-sealing soils present productivity challenges to smallholder farmers despite their high inherent fertility. Crop production on crusting soils is costly due to unfavourable conditions such as surface capping and compaction, which hinder crop emergence. A study was conducted...
  9. Floristic and Structural Composition of Wonderwoud Forest in the Wolkberg, North-Eastern Transvaal

    Item type: Journal Article • Journal: South African Forestry Journal
    The closed, evergreen forest of 450 ha was studied by means of a survey of 55 circular plots of 0,04 ha, distributed in a grid pattern. TWINSPAN classification separated the forest into four stand types: Olea capensis macrocarpa—Xymalos monospora—Syzygium gerrardii...