Articles by Author: A Hoffman

Search results for A Hoffman

We found 40 results for you
  1. Book review

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Holistic Resource Management Allan Savory 1988, Island Press, Washington, DC, 564 pp.
  2. How economic are the farming units of Leliefontein, Namaqualand?

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Nomadic pastoralism has been practised in Leliefontein for centuries. In 1984, the area was formally divided into 47 so‐called ‘economic units’ on the assumption that this agricultural approach would (a) promote development in the region and (b) introduce conservation management...
  3. Communal land use and the ‘tragedy of the commons’: Some problems and development perspectives with specific reference to semi‐arid regions of southern Africa

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Traditional communal farming in southern Africa has often been described as unproductive and directly responsible for regional poverty and vegetation degradation. Each aspect of this argument rests on a set of unchallenged assumptions concerning the nature of communal farming. Studies...
  4. Osmoconditioning of seeds of sweet pepper (<em>Capsicum annuum</em> L.)

    Osmoconditioning of seeds of sweet pepper (<em>Capsicum annuum</em> L.)

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Germination rate of seeds of sweet pepper (Capsicum annuum L.) cv. Florida Resistant Giant was increased significantly at both 15 °C and 25 °C after osmotic priming for 10 days at 15 °C in solutions of polyethylene glycol. Post-treatment drying...
  5. Germination rate of maize (<em>Zea mays</em> L.) kernels. I. Relationships with kernel properties and water uptake

    Germination rate of maize (<em>Zea mays</em> L.) kernels. I. Relationships with kernel properties and water uptake

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Relationships were sought between germination rate and various kernel variables of 12 freshly harvested, undeteriorated seed lots of maize. Germination rate was positively correlated with water content of kernels at all sampling times up to 30 h of incubation and...
  6. Germination rate of maize (<em>Zea mays</em> L.) kernels. II. Relationships with respiration rate and adenosine triphosphate content

    Germination rate of maize (<em>Zea mays</em> L.) kernels. II. Relationships with respiration rate and adenosine triphosphate content

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Germination rate of freshly harvested, undeteriorated seed lots of maize was found to be positively correlated with rate of oxygen uptake of kernels and adenosine triphosphate (ATP) content of embryos, at 6 and 12 h of incubation. Respiration rate was...
  7. Prediction of the chemical composition of winter grain and maize with near infrared reflectance spectroscopy

    Prediction of the chemical composition of winter grain and maize with near infrared reflectance spectroscopy

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Near infrared reflectance spectroscopy (NIRS) was evaluated as a tool for the fast and inexpensive prediction of nutritional values of feedstuffs. NIRS calibrations were developed for winter grain samples collected over three years in the Western Cape region of South...
  8. Differences in the chemical composition and digestibility of cereal hay and straw produced in a Mediterranean rainfall area of South Africa

    Differences in the chemical composition and digestibility of cereal hay and straw produced in a Mediterranean rainfall area of South Africa

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Chemical composition and digestibility values were obtained to provide a database for accurate values of hay and straw types produced in the Western Cape area of South Africa. Straw and hay samples were collected from 10 different localities in the...
  9. FIRST RECORD OF <em>OREOCHROMIS MACROCHIR</em> (BOULENGER, 1912) (PISCES:CICHLIDAE) FROM THE LIMPOPO RIVER IN SOUTHERN AFRICA.

    FIRST RECORD OF <em>OREOCHROMIS MACROCHIR</em> (BOULENGER, 1912) (PISCES:CICHLIDAE) FROM THE LIMPOPO RIVER IN SOUTHERN AFRICA.

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    During 1973/74, Barbus poechii, Oreochromis macrochir, O. andersonii, Serranochromis angusticeps, S. codringtonii, S. robustus and S. thumbergi from the Okavango System were introduced into the Shashe Dam (Limpopo System, Botswana). These species are alien to the Limpopo System. A fish...