Articles by Keyword: Soil Nutrients

Search results for Soil Nutrients

We found 357 results for you
  1. Relationships between plant and soil nutrient status and position in the landscape on Pellic Vertisols of Ethiopia

    Relationships between plant and soil nutrient status and position in the landscape on Pellic Vertisols of Ethiopia

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Effects of land use on soil nutrients and related soil parameters of Pellic Vertisols were assessed using soil samples collected from plots subjected to the cultivation of tef (Eragrostis tef) (TF) and grass pea (Lathyrus sativus) (GP) and native grassland...
  2. The effects of soil conditions and grazing strategy on plant species composition in a semi-arid savanna

    The effects of soil conditions and grazing strategy on plant species composition in a semi-arid savanna

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    The tree:grass ratio of savannas is important, especially in the semi-arid savannas of South Africa. An increase in tree cover leads to reduced productivity and profitability of rangelands. We investigated the effects of soil type and grazing strategy on the...
  3. Dynamics of woody vegetation in a semi-arid savanna, with a focus on bush encroachment

    Dynamics of woody vegetation in a semi-arid savanna, with a focus on bush encroachment

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    Increases in the tree: grass ratio with accompanying changes in herbaceous composition, called bush or shrub encroachment, is a worldwide phenomenon in savanna regions. Although heavy grazing by livestock is often believed to be the cause, it is clear that...
  4. Improving productivity and sustainability of successive rotations of <em>Acacia auriculiformis</em> plantations in South Vietnam

    Improving productivity and sustainability of successive rotations of <em>Acacia auriculiformis</em> plantations in South Vietnam

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science
    We studied the productivity of Acacia auriculiformis plantations in South Vietnam over three successive rotations covering 15 years. The focus of our study was on the effects of inter-rotation management on stand growth and soil properties. Contrastin g slash and...
  5. Long-term livestock grazing increases the recruitment success of epigeal termites: insights from a &gt;75-year grazing experiment in the Karoo, South Africa

    Long-term livestock grazing increases the recruitment success of epigeal termites: insights from a &gt;75-year grazing experiment in the Karoo, South Africa

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    Epigeal termites alter ecosystem-level processes through foraging and mound building. These effects are proportional to density. Whilst much is known about the factors influencing mound density in natural settings, how termites respond to livestock grazing has been overlooked. We compared...
  6. Factors Affecting Soil Phosphate Distribution and Reactions in Cape Forest Soils

    Item type: Journal Article • Journal: South African Forestry Journal
    The amounts of various forms of phosphate in some Cape soils and the adsorption of phosphate by these soils were investigated. The levels were low and only 2% was in available form. The major fraction of phosphate in the soil...
  7. Fertilising Commercial Forest Species in Southern Africa: Research Progress and Problems (Part 1)

    Item type: Journal Article • Journal: South African Forestry Journal
    Since the inception of forest fertiliser research in Southern Africa in 1926, eight eucalypt, six pine and four acacia species have been tested, encompassing a wide range of sites in summer, winter and uniform rainfall areas. Marked deficiencies of P,...
  8. Influence of Soil Organic Matter Content on the Responsiveness of <em>Eucalyptus grandis</em> to Nitrogen Fertiliser

    Item type: Journal Article • Journal: South African Forestry Journal
    It is widely recognised that the inherent nitrogen (N) mineralisation capacity of a soil is directly related to the organic matter content. Consequently, in estimating the N requirements of Eucalyptus grandis at planting this mineralisation potential must be taken into...
  9. 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...
  10. Site Evaluation in Black Wattle with Special Reference to Soil Factors

    Item type: Journal Article • Journal: South African Forestry Journal
    Together with climate, soil characteristics are the most important factors affecting tree growth. However, the attempts in many site evaluation studies to establish a direct relationship between soil factors and tree growth have not been very successful, the exception being...