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Proceedings of the International Plant Propagator's Society

Vol. 28


M. Richards

pp: 411-412

The importance of using the best possible techniques for watering plants is not always recognised in commercial nurseries, largely because plants have a very considerable ability to survive less than ideal conditions, without showing visible signs of the effects of those conditions. It is only when such plants are compared with plants grown under better conditions that the full effects of poor watering techniques can be appreciated.

Plants use very large quantities of water growth, yet comparatively little of this water is retained in the plant. In the lower surface of the leaves are the stomata; during daylight hours these are open to permit air to enter the leaf. Inside the leaf the air comes into contact with cells whose walls are bathed with water; carbon-dioxide is absorbed into this water, and passes into the cells, where it is used in photosynthesis. At the same time, water is evaporated from the cell wall and carried outside the leaf in the air current. This process, called

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