Acknowledgements

Photography Fran & Lon Dalton & Leonard Cobb.

NZ. Hydroponics Ltd., For Equipment, Laboratory services

and research on Hydroponics and Hydroponic crop production.

Text© Lon Dalton, Rob Smith.

First published 1984, Reprinted 1985. l989, l99l,

Revised Edition 1993, New Deluxe Edition 2003.

Electronic online Edition 2013

Published by

Hydroponic Developments Ltd

7 Smiths Road, Tauranga,

New Zealand.

Contact: <rob@bopis.co.nz>

ISBN: 978-0-473- 09277-1

All Rights Reserved.

This publication is protected by world copyright and all

conventions pursuant to electronic book publishing