- - AGRICULTURE CORE CURRICULUM - -

(CLF6000) Advanced Core Cluster: ORNAMENTAL HORTICULTURE

 (CLF6550) Unit Title: PRUNING AND TRAINING ORNAMENTAL PLANTS

         UNIT DIRECTORY:

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          Code    Topic Title                          Hours    Year(s)
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         (CLF6551) Purposes of Pruning                   1       3 / 4

         (CLF6552) Timing of Pruning                     1       3 / 4

         (CLF6553) Identification, Safe Use, and         2       3 / 4
                    Maintenance of Pruning Equipment

         (CLF6554) Techniques for Making Pruning Cuts    2       3 / 4

         (CLF6555) Methods of Pruning Trees and Shrubs   3       3 / 4

         (CFL6556) Major Tree Pruning Systems            2       3 / 4

         (CFL6557) Plant Support Systems                 3       3 / 4

         (CLF6599) Unit Exam

                                    TOTAL TIME FOR UNIT = 14
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UNIT GOAL: Students will identify the important principles involved in 
           pruning and training ornamental trees and shrubs.
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UNIT OBJECTIVES: Upon completion of this unit, students will be able to:

1. Discuss why pruning is necessary for healthy plant growth.

2. Explain six methods for pruning trees and shrubs (e.g., thinning,
   heading back, drop crotch, topping).

3. Identify, use, and properly maintain pruning equipment.

4. Explain the difference between the three major types of tree pruning
   systems (i.e., open center, central leader, and modified central
   leader).

5. Discuss the purposes of training young trees to one of the three systems 
   (i.e., extension of productive life, ease of maintenance, and 
   strengthening of the tree) and demonstrate how to prune to establish 
   scaffold branches.

6. Practice pruning methods on landscaped plants.

7. Identify the appropriate time for pruning plants and discuss why the 
   time of pruning is important.

8. Demonstrate two basic methods of support for ornamentals and discuss
   how, when, and where supports are established, maintained, and removed.

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REFERENCES:

Editors of Ortho Books. (1989). ALL ABOUT PRUNING. Available from:
 Ortho Books, P.O. Box 5047, San Ramon, CA 94583.

Editors of Sunset Books and Sunset Magazine. (1990). WESTERN GARDEN BOOK.
 Menlo Park, CA: Lane Publishing Co.

Harris, Richard W. (1983). ARBORICULTURE: CARE OF TREES, SHRUBS, AND VINES
 IN THE LANDSCAPE. Englewood Cliffs, NJ: Prentice-Hall.

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RESOURCES:


1/16/91 CLH/clh

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