Articles by Author: N C Cook

Search results for N C Cook

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  1. Manipulation of acrotony in one-year-old apple shoots

    Manipulation of acrotony in one-year-old apple shoots

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Unbranched rooted layers of the rootstock Mailing 9 (M.9 clone Nie 29) ≈600 mm long were treated twice in autumn (4 and 13 October 1995) in the stoolbed as follows: a) non-treated control; b) the distal 300 mm of the...
  2. Genotypic response to chilling period of apple buds from two Western Cape localities

    Genotypic response to chilling period of apple buds from two Western Cape localities

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    One-year-old, ca. 40 cm long shoots of various apple cultivars were selected from commercial orchards in both the Elgin [34°S, 305 m, ca. 750 Utah Chill Units (CU)] and Koue Bokkeveld (33°S, 945 m, ca. 1300 CU) regions of the...
  3. Budburst and yield of ‘Peeka’ apricot influenced by time and concentration of hydrogen cyanamide application

    Budburst and yield of ‘Peeka’ apricot influenced by time and concentration of hydrogen cyanamide application

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The rest-breaking response of ‘Peeka’ apricots (P. armeniaca L.) grown locally under conditions of inadequate winter chilling to 0%, 0.25%, 0.5%, 0.75%, and 1% hydrogen cyanamide sprayed 29 July, 3 August, 13 August, and 17 August 1987 is reported, owing...
  4. The effect of rootstock cultivar on the yield and fruit quality of ‘Packham's Triumph’, ‘Doyenne du Comice’, ‘Forelle’, ‘Flamingo’ and ‘Rosemarie’ pears

    The effect of rootstock cultivar on the yield and fruit quality of ‘Packham's Triumph’, ‘Doyenne du Comice’, ‘Forelle’, ‘Flamingo’ and ‘Rosemarie’ pears

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Production data and questionnaire results concerning the long-term effects of various rootstocks on pear (Pyrus communis L.) yield indicated that BP1 and BP3 are currently the preferred rootstocks in the South African industry. Yield records of ‘Packham's Triumph’ pears indicated...
  5. High-density orchards improve the quality of ‘Songold’ plums from lower, more shaded canopy positions

    High-density orchards improve the quality of ‘Songold’ plums from lower, more shaded canopy positions

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Gel breakdown is a major postharvest problem in ‘Songold’ plums (Prunus salicina Lindl.) that is exacerbated in fruit harvested from lower canopy positions in large trees. Modern high-density orchards with small trees aggressively address this problem through improved light distribution...
  6. Effect of mineral oil and hydrogen cyanamide concentration on dormancy breaking in ‘Golden Delicious’ apple trees

    Effect of mineral oil and hydrogen cyanamide concentration on dormancy breaking in ‘Golden Delicious’ apple trees

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    South African production areas receive insufficient winter chilling for apple production, necessitating the use of artificial means to break dormancy. Hydrogen cyanamide (HC) alone or in combination with mineral oil (oil) is used as a rest-breaking agent in many deciduous...
  7. Effect of timing and concentration of rest breaking agents on budburst in ‘Bing’ sweet cherry under conditions of inadequate winter chilling in South Africa

    Effect of timing and concentration of rest breaking agents on budburst in ‘Bing’ sweet cherry under conditions of inadequate winter chilling in South Africa

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The effect of timing of various rest breaking agents (RBAs) on vegetative and floral budburst, and production efficiency was investigated on 4-year-old ‘Bing’ sweet cherry trees on ‘Gisela® 5’ rootstock. Two experiments were conducted, near Clarens (28°28’S; 28°19’E, 1860 m.a.s.l)...
  8. Growth regulator manipulation of apple bud dormancy progressions under conditions of inadequate winter chilling

    Growth regulator manipulation of apple bud dormancy progressions under conditions of inadequate winter chilling

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Elgin (34°S, 19°E; 305 m.a.s.l.), typical of South African apple growing regions, accumulates 745 Utah Chill Units (CU) p.a. The chilling requirement of ‘Golden Delicious’ apple (Malus xdomesf/ca Borkh.) is c.a. 1100 CU. Consequently, the chilling requirement is not satisfied...
  9. Effect of the Benguela temperature anomaly, 1982–1983, on the breeding cycle of <em>Donax serra</em> Röding

    Effect of the Benguela temperature anomaly, 1982–1983, on the breeding cycle of <em>Donax serra</em> Röding

    Item type: Journal Article • Journal: South African Journal of Marine Science
    As part of an environmental monitoring programme for Koeberg nuclear power station near Cape Town, the breeding cycle and population dynamics of the white mussel Donax serra Röding were studied between early 1981 and the end of 1985. There is...