Articles by Author: P M Lang

Search results for P M Lang

We found 15 results for you
  1. Effect of the amount of surface maize residue on infiltration and soil loss from a clay loam soil

    Effect of the amount of surface maize residue on infiltration and soil loss from a clay loam soil

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Six levels of maize stover, expressed as percentage ground cover (0–75%) were compared under a rainfall simulator to assess the effect of surface residues on infiltration and soil loss on a clay loam soil with a 3,5% slope. Increasing the...
  2. The effect of tillage system on lodging in maize resulting from a severe rainstorm

    The effect of tillage system on lodging in maize resulting from a severe rainstorm

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Severe lodging in maize lands on Cedara on the 24 February 1985 was caused by a rainstorm registering Force 10 on the Beaufort scale. Large differences in lodging existed between plots in three tillage trials. In two identical primary tillage...
  3. The effect of tillage system and rate and time of nitrogen application on maize performance on a sandy Avalon soil

    The effect of tillage system and rate and time of nitrogen application on maize performance on a sandy Avalon soil

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Four nitrogen fertilizer regimes were superimposed on a tillage trial on a sandy Avalon soil at Dundee in 1985 in order to investigate whether the rate and time of N fertilizer application influenced the poor early-season growth and reduced yields...
  4. Changes in a Doveton clay loam after 12 years of direct-drill maize production

    Changes in a Doveton clay loam after 12 years of direct-drill maize production

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    After 8 years of direct-drill maize production at Cedara on a Hutton/Doveton clay loam (Typic Plinthustult) it was found that the top 120-mm layer had become somewhat denser and that organic carbon levels in the top 20 mm were higher...
  5. Validation of age estimates in sparid fish using flubrochrome marking

    Validation of age estimates in sparid fish using flubrochrome marking

    Item type: Journal Article • Journal: South African Journal of Marine Science
    The marking of sparid otoliths by means of oxytetracycline and alizarin complexone was investigated by immersion, feeding and intraperitoneal and intramuscular injections. Of these techniques, immersion for 24 h in a 100–150 mg·ℓ−1 seawater solution of alizarin complexone was found...
  6. Growth characteristics in the otoliths of selected South African sparid fish

    Growth characteristics in the otoliths of selected South African sparid fish

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Growth characteristics in the otoliths of several South African sparid fish (Diplodus sorgus copensis, D. cervinus hottentotus, Chrysoblephus laticeps, Cymotoceps nasutus, Pochymetopon grande, Rhobdosargus holulbi and Sparodon durbonensis) were investigated. The micro-incremental pattern of deposition in the otoliths conformed to...
  7. An evaluation of participation in and management of the South African spearfishery

    An evaluation of participation in and management of the South African spearfishery

    Item type: Journal Article • Journal: South African Journal of Marine Science
    An evaluation of participation and management of the South African spearfishery was undertaken by analysing spearfishing catch and effort data stored on the National Marine Linefish System (NMLS) and by conducting a creel and questionnaire survey. Results indicated that the...
  8. Long-term trends in catch and effort in the KwaZulu-Natal nearshore linefisheries

    Long-term trends in catch and effort in the KwaZulu-Natal nearshore linefisheries

    Item type: Journal Article • Journal: South African Journal of Marine Science
    The boat-based linefishery is the most important marine fishery along the coast of KwaZulu-Natal, producing 40% of the total annual mass of fish landed there. Since 1900, the fishery has supported commercial and recreational sectors that compete for more than...
  9. Is pregnancy termination being used as a family planning method in the Free State?

    Is pregnancy termination being used as a family planning method in the Free State?

    Item type: Journal Article • Journal: South African Family Practice
    Background: This study determined the profile of women seeking termination of pregnancy (TOP) in the Free State and whether TOP was used as a family planning method.