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Proceedings of the International Plant Propagator's Society

Vol. 31

Title:
ACCEPTANCE OF GLASS SUBSTITUTES IN GREENHOUSE CLADDING AND DESIGN

Author:
B.E. Sinclair

pp: 340-341

Abstract:
Here in New Zealand, isolated as we are from the major horticultural areas of the world, new techniques and developments gain acceptance only slowly. New materials for the greenhouse skin are no exception. In recent times, other work (1) has covered the characteristics and operating costs of the alternatives. The aim of this paper is to comment on the current useage of these materials and their applications on the basis of information gleaned from greenhouse builders and growers themselves.

There are certain overlying considerations when choosing a covering and design:

  1. The initial outlay.
  2. The heat conservation properties of the total structure.
  3. Repairs and maintenance, including re-cladding.

To put this another way, the operating costs of the proposed design per unit of area are a major deciding factor. This figure must, however, be balanced against any change in the yield or growth characteristics of the crop in a new environment. The necessity for and the cost of

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