- - AGRICULTURE CORE CURRICULUM - -

(CLF6000) Advanced Core Cluster: ORNAMENTAL HORTICULTURE

 (CLF6600) Unit Title: GROWTH & MAINTENANCE OF NURSERY STOCK

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 (CLF6601) Topic: HORTICULTURE STRUCTURES    Time              Year(s) 
                                                1 hour              3 / 4 
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         Topic Objectives: Upon completion of this lesson, the student
                            will be able to:

         Learning Outcome #:

           (K-8) - Identify and explain the use of various types of 
                     horticulture structures (e.g., head house, shade 
                     house, greenhouse).

         Special Materials and Equipment: 
                     

         References: Ball, Vic (Ed.). (1985). BALL RED BOOK (14th ed.).
                       Reston, VA: Reston Publishing Company.
                     Ingels, J. (1985). ORNAMENTAL HORTICULTURE:
                       PRINCIPLES & PRACTICES. Albany, NY: Delmar
                       Publishers.

         Evaluation: Quiz or test.

TOPIC PRESENTATION: GROWTH & MAINTENANCE OF NURSERY STOCK

A. Greenhouses are the most visible and the most important structures in 
   commercial plant production.

   1. A greenhouse is an enclosed structure designed to provide ideal 
       conditions of light, temperature, and humidity for the growing of 
       plants.

   2. Greenhouse Shapes

       a. Even span

              1) This is the most common greenhouse shape.

              2) It is a freestanding unit with the same degree of slope on
                 each side.

       b. Uneven span

              1) This shape is seldom used in the U.S.

              2) It is designed to be used on slopes and to take advantage 
                 of the south slope.

       c. Ridge-and-furrow

              1) This type of structure is common in large commercial 
                 nurseries.

              2) It consists of two or more even-span houses joined at the 
                 gutter line.

       d. Greenhouse coverings may be of either glass, fiberglass, 
           polycarbonate or polyethylene.

B. Shade houses have several different uses in the nursery industry.

   1. They are used to grow plants that must be grown in the shade or that
       do better growing in the shade.

   2. They are also used to help plants that were started in the 
       greenhouse adjust to the outside environment.

C. Headhouse

   1. This is a service area or building attached to a greenhouse, usually
       for housing temperature-control equipment and providing working and 
       storage room.

   2. It is called a headhouse because it is normally at the front or head 
       of the greenhouse range.


NOTE TO INSTRUCTOR: The instructor may want to add information on hot 
                    frames, mist beds, cold frames, etc. to this section.


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         ACTIVITY: 
 
         1. Have the students design a wholesale nursery. As part
             of the assignment, have students explain the reasons 
             they chose the type of structure they designed.
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1/7/91 MT/clh

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