Articles by Author: T P Bennie

Search results for T P Bennie

We found 18 results for you
  1. Soil factors affecting tree growth and root development in a citrus orchard

    Soil factors affecting tree growth and root development in a citrus orchard

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Tree- and root-growth parameters correlated well with a number of soil properties Useful relationships were established between unconfined penetrometer resistance, air capacity (at FWC), tree growth and root development.
  2. Causes, adverse effects and control of soil compaction

    Causes, adverse effects and control of soil compaction

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The causes, adverse effects and control of soil compaction, with special reference to Southern African conditions, are reviewed. The main causes for soil compaction are the well-rounded and -sorted fine sand fraction of the aeolian sandy soils combined with compression...
  3. Penetration resistance of fine sandy apedal soils as affected by relative bulk density, water content and texture

    Penetration resistance of fine sandy apedal soils as affected by relative bulk density, water content and texture

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The major physical properties that control the penetration resistance of soils are the degree of soil compaction, water content and particle size distribution. Sandy soils with well-sorted particle size distributions and low cohesivity compact and consolidate easily under pressure. Six...
  4. Concentration, accumulation and uptake rate of macro-nutrients by winter wheat under irrigation

    Concentration, accumulation and uptake rate of macro-nutrients by winter wheat under irrigation

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The objective of this study was to obtain information on the nutrient uptake patterns of winter wheat (Triticum aestivum L.) grown under normal irrigation farming conditions. Except for irrigation scheduling, 13 farmers were allowed to follow their normal farming practices...
  5. Die verhouding van bogrondse plant materiaal tot wortelgroeiveranderlikes van mielies op die Rooipoort/Clansthal ekotoop

    Die verhouding van bogrondse plant materiaal tot wortelgroeiveranderlikes van mielies op die Rooipoort/Clansthal ekotoop

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Die verwantskap tussen bogrondse droƫplantmassa, blaar- area-indeks en wortellengte vir mielies (Zea mays L. cv. PNR473) is op 'n Clansthal grondserie naby Potchefstroom ondersoek om sodoende 'n bydrae tot gewasmodellering te maak. Toekomstige wortellengtemetings kan moontlik by diƩ ekotoop en...
  6. Concentration, accumulation and uptake rate of Cu, Fe, Mn and Zn by wheat under irrigation

    Concentration, accumulation and uptake rate of Cu, Fe, Mn and Zn by wheat under irrigation

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The objective of this study was to obtain information on the Cu, Fe, Mn and Zn uptake patterns of wheat (Triticum aestivum L.) grown under normal irrigation farming conditions. Except for irrigation scheduling, the 13 farmers on whose farms the...
  7. Nutrient inflow to the roots of irrigated wheat throughout the growing season under semi-arid climatic conditions

    Nutrient inflow to the roots of irrigated wheat throughout the growing season under semi-arid climatic conditions

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The objective of this study was to obtain information on the inflow of N, P, K, Ca, Mg, S, Cu, Fe, Mn and Zn to the roots of wheat (Triticum aestivum L.) grown under normal irrigation farming conditions. Except for...
  8. Effek van bewerking op die organiese materiaalinhoud van geselekteerde droëlandgronde in Suid-Afrika

    Effek van bewerking op die organiese materiaalinhoud van geselekteerde droëlandgronde in Suid-Afrika

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Die doel van die ondersoek was om (1) die effek van bewerking op die organiese materiaalinhoud van gronde te kwantifiseer indien onversteurde gronde as verwysing dien; (2) die verband tussen bewerkingstyd en die afname in organiese materiaal te kry en...
  9. A procedure for determining the minimum bulk density of soils

    A procedure for determining the minimum bulk density of soils

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The purpose of this study was to establish a procedure and develop equipment for determining the minimum bulk density of soils. Six soils with silt-plus-clay contents varying between 8 and 41% were selected. The determination consisted of pouring the soil...