Articles by Keyword: Yield

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  1. Impact of Wood Quality Assessments on Future Fibre Resources in the Pulp and Paper-making Industry

    Item type: Journal Article • Journal: South African Forestry Journal
    Recent evidence from research in Europe has indicated that individual trees can be sampled for their pulping properties by the removal of small quantities (5–50 g) of wood at about breast height (1,3 m above ground). Work began at Sappi's...
  2. Modelling Diameter and Height Distributions through Dispersion Statistics in Even-aged Pine Plantations

    Item type: Journal Article • Journal: South African Forestry Journal
    Diameter and height distribution recovery, in combination with standlevel projection modelling, is generally used in Southern Africa for predicting growth and yield in even-aged pine plantations. A different approach for modelling diameter and height distributions for five pine species commercially...
  3. The performance of tropical pastures in the drier phase of the Highland sourveld of Natal

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Several tropical grasses (Acroceras macrum, Cenchrus ciliaris, Cyndon sp., Digitaria sp. and Pennisetum clandestinum) and legumes (Desmodium uncinatum and Lotononis bainesii) were evaluated at the Kokstad Research Station (Bioclimatic sub‐region 4f of Natal) over a period of seven years. The...
  4. Long term nitrogen and phosphorus application to veld

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    The long term effects of a 5N x 3P factorial fertilizer application trial on hay yields, botanical composition and soil properties of veld are presented. Significant increases in hay yields were recorded during most years. There was a strong correlation...
  5. Growth patterns of Italian ryegrass cultivars established in different seasons

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    A comparison is made between various Italian ryegrass cultivars established under irrigation on a well‐drained upland site during the traditional autumn months, with plantings of the same cultivars at other times of the year.
  6. Production and quality norms of certain grass species for fodder flow planning: Pretoria area

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Four subtropical (Cenchrus. Digitaria, Anthephora and Sorghum) and two temperate grass species (Festuca. Agrotricum) were grown in a replicated field experiment at three levels of N application, with adequate P and K. Species were mown at 4‐, 6‐ and 8‐weekly...
  7. Responses of four perennial pasture legumes to soil amendment with lime and superphosphate

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Yield response of crownvetch (Coronilla varia) cv. Penngift, lucerne (Medicago sativa) cv. CUF 101, white clover (Trifolium repens) Dusi type and Kenya white clover (T. semipilosum) cv. Safari to differential application of lime and superphosphate were determined in a 5...
  8. The relative yield potential of westerwolds and Italian ryegrass cultivars in autumn‐planted pastures and their flowering patterns following spring‐establishment

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Herbage yields from autumn‐planted Lolium multiflorum cultivar trials conducted in the Natal Mist Belt indicated that, in general, the Westerwolds ryegrass cultivars had greater yield potential than the Italian ryegrass cultivars during the cold winter months. Conversely, the Italian ryegrass...
  9. Potential of medic and lucerne pastures in the rûens area of the Southern Cape

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    The potential of dryland lucerne and medic pastures was compared over a range of stocking rates, i.e. three, four, five, six, seven and eight merino ewes per hectare, in the Rûens area of the Southern Cape. It was found that...
  10. The effect of seeding rate and weed control on the establishment of Rhodes grass in the Eastern Cape

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    The effect of four seeding rates (3; 6; 12 and 24 kg/ha), four methods of weed control (nil, mowing, 4 l/ha of 2,4‐D amine and hand weeding) and two times of cutting (late boot stage and end of season) on...