The last two decades have seen rapid advances in the technology used to produce pot plants. Glasshouses designed and orientated to give maximum light transmission, fully automatic heating and ventilating systems, carbon dioxide enrichment of the atmosphere, controlled photoperiods using automatic blackouts and incandescent lamps which enable plants such as chrysanthemum to be flowered at any time of the year, mist propagation techniques, chemical growth regulators which control the height of plants, automatic watering and feeding systems, etc.: these are only some of the developments which have transformed pot plant culture. There have also been many changes in the composts and systems used to grow the plants. Mineral soils, which formed the basis of the John Innes Composts, are now either too expensive or too difficult to obtain in suitable quality and sufficient quantity. Consequently the grower has been forced to seek other materials such as peat, perlite, vermiculite, plastic foam, shredded bark, etc. New types of fertilisers, new methods of heat sterilisation and new chemical sterilising agents are also being used.
"synopsis" may belong to another edition of this title.
Seller: SEVERNBOOKS, Telford, SHROP, United Kingdom
Hardcover. Condition: Very Good. Dust Jacket Condition: Good. 1st Edition. 1976 TRUE FIRST EDITION (British). 277 pages. Dustwrapper is clean. Has small losses top of spine fold and top corners. a few tears have been repaired. Crease folds at top/bottom of front. Unclipped. Book has clean and undamaged brown covers and is tight. Pages are bright, clean and unmarked. No inscriptions. A hardly used example of rare first edition. Seller Inventory # B1272
Quantity: 1 available
Seller: Mispah books, Redhill, SURRE, United Kingdom
hardcover. Condition: Good. Good. Dust Jacket NOT present. CD WILL BE MISSING. . SHIPS FROM MULTIPLE LOCATIONS. book. Seller Inventory # ERICA82900463501013
Quantity: 1 available