Articles by Author: John C Nwite

Search results for John C Nwite

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  1. Interaction of small-scale supplemental irrigation, <em>sawah</em> preparation intensity and soil amendment type on productivity of lowland <em>sawah</em>-rice system

    Interaction of small-scale supplemental irrigation, <em>sawah</em> preparation intensity and soil amendment type on productivity of lowland <em>sawah</em>-rice system

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Sole dependence on rainfall, poor water management and low soil fertility largely explain the fluctuations in agricultural productivity in West Africa. Lowlands for sawah-based rice farming often offer opportunities for small-scale supplemental irrigation but these are rarely explored and their...
  2. The Use of Roots to Test N, P and K Deficiencies in <em>Eucalyptus</em> Nutrition

    Item type: Journal Article • Journal: South African Forestry Journal
    Bioassays have been developed which can provide diagnostics of the nutritional status of trees. They measure the flux of N, P or Rb for K into roots from standard solutions where the rate of influx is inversely related to nutrient...
  3. Postflexion and transforming larvae of <em>Gonorynchus gonorynchus</em> (Linnaeus, 1766)

    Postflexion and transforming larvae of <em>Gonorynchus gonorynchus</em> (Linnaeus, 1766)

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Postflexion larvae of Gonorynchus gonorynchus, previously undocumented, are described from the South-East Atlantic. Comparisons with descriptions of larval G. abbreviatus and larvae of another, still unidentified, species of Gonorynchus suggest slight to conspicuous differences in pigmentation between species.
  4. Development of a doubled haploid mapping population and linkage map for the bread wheat cross Kariega × Avocet S

    Development of a doubled haploid mapping population and linkage map for the bread wheat cross Kariega × Avocet S

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    A doubled haploid wheat population of 150 lines was constructed from the F1 of a cross between cultivars Kariega and Avocet S using the wheat-maize technique. Segregation and linkage analysis of 203 DNA markers, two storage protein markers and the...
  5. Effects of soil surface management practices on soil and tree parameters in a ‘Cripps Pink’/M7 apple orchard 1. Mineral nutrition

    Effects of soil surface management practices on soil and tree parameters in a ‘Cripps Pink’/M7 apple orchard 1. Mineral nutrition

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Effects on soil, leaf and fruit element concentrations of organic (compost, straw mulch and hand weeding) and integrated (inorganic fertilisers and herbicide usage; IP) soil surface management practices in the tree rows, in combination with weed covers, cover crops and...
  6. Effects of soil surface management practices on soil and tree parameters in a ‘Cripps Pink’/M7 apple orchard 2. Tree performance and root distribution

    Effects of soil surface management practices on soil and tree parameters in a ‘Cripps Pink’/M7 apple orchard 2. Tree performance and root distribution

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Effects of integrated production (IP) and organic-acceptable soil surface management practices were investigated in a ‘Cripps Pink’/M7 apple orchard in the Elgin area, South Africa. Work row treatments included cover crops, weeds and straw mulch. In the IP tree rows,...