Articles by Author: Pardon Muchaonyerwa

Search results for Pardon Muchaonyerwa

We found 11 results for you
  1. Conservation agriculture effects on plant nutrients and maize grain yield after four years of maize–winter cover crop rotations

    Conservation agriculture effects on plant nutrients and maize grain yield after four years of maize–winter cover crop rotations

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The effects of maize rotation with oat (Avena sativa cv. Sederberg) and grazing vetch (Vicia dasycarpa cv. Max) winter cover crops on nutrient availability, maize grain yield and maize grain nutrient concentration were investigated. Soil samples were collected from the...
  2. A vetch winter cover crop can improve response to nitrogen fertiliser and profitability of no-till maize

    A vetch winter cover crop can improve response to nitrogen fertiliser and profitability of no-till maize

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    A high nitrogen (N) fertiliser requirement can be a deterrent to the adoption of conservation agriculture (CA). A field trial was carried out to test whether a high biomass-yielding vetch (Vicia dasycarpa L.) winter cover crop can be used to...
  3. Effects of oats and grazing vetch cover crops and fertilisation on microbial biomass and activity after five years of rotation with maize

    Effects of oats and grazing vetch cover crops and fertilisation on microbial biomass and activity after five years of rotation with maize

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Degraded soil quality could be improved by cover crops. This study determined effects of maize–oats and maize– vetch rotations with or without fertilisation on soil microbial biomass and activity. Winter treatments were oats, vetch and weedy fallow, in rotation with...
  4. Tillage and crop rotation effects on carbon sequestration and aggregate stability in two contrasting soils at the Zanyokwe Irrigation Scheme, Eastern Cape province, South Africa

    Tillage and crop rotation effects on carbon sequestration and aggregate stability in two contrasting soils at the Zanyokwe Irrigation Scheme, Eastern Cape province, South Africa

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Intensive tillage and monocropping have adversely affected the quality of soils in South Africa through accelerated loss of soil organic matter. Two clay loam soils, a Bonheim at Burnshill and a Shortlands at Lenye, at the Zanyokwe Irrigation Scheme in...
  5. Spatial variability of selected soil micronutrients under smallholder crop production in Zanyokwe, Eastern Cape, South Africa

    Spatial variability of selected soil micronutrients under smallholder crop production in Zanyokwe, Eastern Cape, South Africa

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Understanding spatial variability of soil nutrients, including that of micronutrients, is important for establishing best management practices in smallholder crop production. The objective of this study was to determine the status and spatial variability of potentially available zinc (Zn), copper...
  6. Persistence of the pesticidal <em>Bacillus thuringiensis</em> protein expressed in Bt maize plant materials in two soils of the Central Eastern Cape, South Africa

    Persistence of the pesticidal <em>Bacillus thuringiensis</em> protein expressed in Bt maize plant materials in two soils of the Central Eastern Cape, South Africa

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Environmental effects of genetically modified plants are not yet fully understood. Experiments were conducted to determine relative amounts of the bioactive Bt protein in roots, leaves and stems of Bt maize and persistence of the protein in two soil forms...
  7. Effect of pine bark goat manure medium on seedling growth and N, P, K concentration of various vegetables

    Effect of pine bark goat manure medium on seedling growth and N, P, K concentration of various vegetables

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Pine bark compost is the medium of choice for seedling growers in South Africa due to its availability, low cost and good physical properties. However, it is acidic, has low electrical conductivity (EC) and nutrient content such that fortification and...
  8. Effects of relay inter-cropping summer cover crops with maize on cover crop biomass and maize yields in a warm-temperate region of South Africa

    Effects of relay inter-cropping summer cover crops with maize on cover crop biomass and maize yields in a warm-temperate region of South Africa

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Little research attention has been given to growing summer cover crops as part of conservation agriculture systems. Three cover crops (sorghum [Sorghum bicolor], mucuna [Mucuna pruriens] and sunhemp [Crotalaria juncea]) were relay-intercropped into maize [Zea mays] 42 days after planting...
  9. Carbon and nitrogen mineralisation and inactivation of the Cry1Ab protein in Bt maize (MON810) residues during composting

    Carbon and nitrogen mineralisation and inactivation of the Cry1Ab protein in Bt maize (MON810) residues during composting

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    A study was carried out to determine the effects of composting Bt maize residues on carbon (C) and nitrogen (N) contents and activity of the Cry1Ab protein in the compost. Residues (leaf plus stem) of mature Bt maize (DKC 7815B)...
  10. Winter cover crops and fertiliser effects on the weed seed bank in a low-input maize-based conservation agriculture system

    Winter cover crops and fertiliser effects on the weed seed bank in a low-input maize-based conservation agriculture system

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    This study investigated the effects of grazing vetch (Vicia dasycarpa L.) and oat (Avena sativa L.) cover crops and fertiliser on the seed bank of some problematic weeds in a maize-based conservation agriculture system. Soil sampling for seed bank analysis...