Articles by Keyword: Soil Organic Matter

Search results for Soil Organic Matter

We found 410 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. Considerations on the sustainability and environmental impact of intensive pastures

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Intensive pastures form an important component of livestock production systems in South Africa. The sustainability and environmental impact of intensive pastures via their effects on soil properties and nutrient fluxes vary considerably depending on the systems adopted. Soil organic C...
  3. Die rol van sekere omgewingsfaktore by alachloraktiwiteit

    Die rol van sekere omgewingsfaktore by alachloraktiwiteit

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Biotoetse met graansorghum (Sorghum bicolor L.) is in potte in glashuise en groeikabinette uitgevoer. Geselekteerde grond- eienskappe is gekorreleer met alachloraktiwiteit. Organiese materiaalinhoud (% C) was die beste gekorreleerd met die aktiwiteit van alachlor en pH die swakste. Die r-waardes...
  4. Rapid simultaneous rating of soil texture, organic matter, total nitrogen and nitrogen mineralization potential by near infra-red reflectance

    Rapid simultaneous rating of soil texture, organic matter, total nitrogen and nitrogen mineralization potential by near infra-red reflectance

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    A rapid non-destructive technique for the determination of various soil properties by near infra-red spectrophotometry is described. Over 100 soils, of which the organic matter content, total nitrogen (N) content, N-mineralizing potential and particle size distribution were known, were used...
  5. Importance of selected soil properties on the bioactivity of alachlor and metolachlor

    Importance of selected soil properties on the bioactivity of alachlor and metolachlor

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Bioassays with grain sorghum (Sorghum bicolor L. Moench) cultivar NK222 were conducted in a glasshouse. Thirty-four natural soils were used in each of two experiments with alachlor [2-chloro-2′,6′-diethyl-N- (methoxymethyl) acetanilide] and metolachlor [2-chloro-6′-ethyl-N-(2-methoxy-1-methylethyl)acet-otoluidide] respectively. Linear regression analyses were performed to...
  6. Loss of nitrogen fertility and its restoration in some Orange Free State soils

    Loss of nitrogen fertility and its restoration in some Orange Free State soils

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The effects of present or past cultivation on nitrogen fertility in some central Orange Free State soils were investigated by the comparison of paired samples of cultivated or reverted soils with uncultivated soils situated as closely as possible to one...
  7. Importance of selected soil properties on the bioactivity of acetochlor and metazachlor

    Importance of selected soil properties on the bioactivity of acetochlor and metazachlor

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The bioactivity of acetochlor (2-chloro-N-(ethoxymethyl)-6′-ethyl-o-acetotoluidide) and metazachlor (2- chloro-N-(1-pyrazolylmethyl)-aceto-2′,6′-xylidide) was evaluated in thirty-two soils under controlled conditions. Grain sorghum (Sorghum bicolor L. Moench) cultivar NK222 was used as the indicator plant in the bioassays. Bioactivity was correlated with organic matter...
  8. Long-term effects of conservation practices on the nitrogen fertility of a soil cropped annually to wheat

    Long-term effects of conservation practices on the nitrogen fertility of a soil cropped annually to wheat

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Sustainable farming in the semi-arid interior of South Africa requires the adoption of conservation practices to maintain and, if possible, increase soil fertility. The effects of some such practices on the nitrogen fertility of a hydromorphic sandy clay loam soil...
  9. The effect of oven-drying on residual inorganic nitrogen in soils

    The effect of oven-drying on residual inorganic nitrogen in soils

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Residual ammonium nitrogen in soils which were dried in an oven increased, whereas residual nitrate nitrogen remained almost constant. This observation led to experiments which help to explain the accumulation of ammonium nitrogen in oven-dried soils. It was found that...
  10. The effect of grazing frequency and intensity on the root development of <em>Lolium perenne</em> L. under subtropical conditions

    The effect of grazing frequency and intensity on the root development of <em>Lolium perenne</em> L. under subtropical conditions

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The root organic matter (OM) per unit volume of soil of Lolium perenne L. (perennial ryegrass) was evaluated over two years under subtropical conditions. Root OM was measured on five separate occasions in four soil-depth categories (0–50, 50–100, 100–200 and...