Research ArticleArticles

Fall Fertilization and Cold Hardiness in Landscape Trees

E. Thomas Smiley and A.M. Shirazi
Arboriculture & Urban Forestry (AUF) November 2003, 29 (6) 342-346; DOI: https://doi.org/10.48044/jauf.2003.043

Article Figures & Data

Figures

  • Figure 1.
    Figure 1.

    Mean temperature at which 50% of red maple samples were killed (LT50) after trees were fertilized on October 14, 1999, with urea (46-0-0) applied at a rate of 1.3 kg N/100m2, Boost (28-9-9) at 1.3 or 2.7 kg N/100 m2, or left nonfertilized as a control. Means that are significantly different from the control using Duncan’s Multiple Range Test (p = 0.05) are indicated with an asterisk.

  • Figure 2.
    Figure 2.

    Mean temperature at which 50% of crapemyrtle samples were killed (LT50) after trees were fertilized on September 16, 1998, with urea (46-0-0) applied at a rate of 1.3 kg N/100m2, Boost (28-9-9) at 1.3 or 2.7 kg N/100 m2, or left nonfertilized as a control. Means that are significantly different from the control using Duncan’s Multiple Range Test (p = 0.05) are indicated with an asterisk.

  • Figure 3.
    Figure 3.

    Mean temperature at which 50% of Leyland cypress samples were killed (LT50) after trees were fertilized on September 16, 1998, with urea (46-0-0) applied at a rate of 1.3 kg N/100m2, Boost (28-9-9) at 1.3 or 2.7 kg N/100 m2, or left nonfertilized as a control. Means that are significantly different from the control using Duncan’s Multiple Range Test (p = 0.05) are indicated with an asterisk.

Tables

  • Table 1.

    Year of treatment, species fertilized, number of trees, and average caliper at 30.5 cm (12 in.) above soil line of fall-fertilized trees in Charlotte, North Carolina.

    Year/speciesNumber of trees per treatmentAverage caliper
    in.cmS.D.
    1997z
    Sawtooth oak (Quercus acutissima)84.5111.94
    Trident maple (Acer buergeranum)113.591.81
    1998x
    Leyland cypress (Cupressocyparis leylandii)98.5212.11
    Crapemyrtle (Lagerstroemia indica)112.560.96
    1999y
    Red maple (Acer rubrum)114.8121.56

    • ↵z Fertilizer applied September 2 and 3, 1997. Sampled October 27 and December 16, 1997; and February 9, 1998.

    • ↵y Fertilizer applied September 16, 1998. Sampled November 16, 1998; and January 18 and February 22, 1999.

    • ↵x Fertilizer applied October 14, 1999. Sampled November 29, 1999; and January 10 and February 28, 2000.

Back to top

In this issue

Print
Download PDF
Email Article
Citation Tools
Fall Fertilization and Cold Hardiness in Landscape Trees
E. Thomas Smiley, A.M. Shirazi
Arboriculture & Urban Forestry (AUF) Nov 2003, 29 (6) 342-346; DOI: 10.48044/jauf.2003.043
del.icio.us logo Twitter logo Facebook logo Mendeley logo
Bookmark this article

Jump to section

Keywords