| Patents for A01G 31 - Hydroponics; Cultivation without soil (10,431) |
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| 08/07/1991 | CN1053526A Symbiotic fish (shrimp)-vegetable system |
| 08/06/1991 | US5037688 Material for protecting a slope surface and for water treatment and contact purposes |
| 08/06/1991 | US5037470 Silicon, dioxide fibers containing soluble metal oxide nutrients |
| 07/30/1991 | US5035080 Element for above-ground cultivation |
| 07/10/1991 | EP0263857B1 Conveyer |
| 07/02/1991 | CA1285389C Plant cultivating apparatus |
| 06/25/1991 | US5025589 Method and apparatus for growing bean sprouts |
| 06/19/1991 | EP0432206A1 Wastewater treatment system |
| 06/14/1991 | CA2005561A1 Method and installation for hydro-ponically growing plants |
| 06/09/1991 | WO1991008662A1 Plant growing medium containing mineral fibres |
| 05/16/1991 | DE4033813A1 Improving plant growth in hydro-cultures - comprises using ion-exchange resin as long term fertiliser and nutrient soln. contg. carbonic acid and dolomite chalk |
| 05/15/1991 | EP0427704A1 Procedure for the fabrication of porous ceramic granulates, the fabricated product and its application |
| 05/08/1991 | EP0425590A1 PROCESS FOR STABILISING THE pH OF AQUEOUS FEED SOLUTIONS AND FOR ABSORBING AND BUFFERING URINE AND WOUND SECRETIONS. |
| 05/02/1991 | EP0425005A2 Plant culture kit and a plant growth system and a breeding system therefor |
| 05/01/1991 | CN1050968A Method of biological beautification of water environment of parks |
| 04/30/1991 | US5010837 Floating raceway, floating water storage tank, composite floating raceway, marine paddy farming device, floating hydroponic farming device, and vessel |
| 04/30/1991 | US5010686 Hydroponic system |
| 04/23/1991 | US5009792 Method for clarifying aqueous salt solutions |
| 04/23/1991 | US5009031 Grow-mat for cultivating plants and a method for manufacturing same |
| 04/23/1991 | US5009030 Substrate for soil-free culture having a controlled water content over its thickness |
| 04/23/1991 | US5009029 Conductive temperature control system for plant cultivation |
| 04/17/1991 | EP0418323A4 Integument and method for culturing and growing organic material |
| 03/27/1991 | EP0418323A1 Integument and method for culturing and growing organic material. |
| 03/27/1991 | EP0418298A1 Control valves and method of plant growing using flow control. |
| 03/26/1991 | US5001859 Method and structure for environmental control of plant growth |
| 03/13/1991 | EP0416838A1 Propagation block |
| 03/07/1991 | WO1991002454A1 Plant pot for substrate culture |
| 02/27/1991 | EP0414330A1 Plant pot for substrate culture |
| 02/26/1991 | CA1280602C Apparatus for hydroponics |
| 02/12/1991 | US4992942 Apparatus and method for controlling a system, such as nutrient control system for feeding plants, based on actual and projected data and according to predefined rules |
| 02/05/1991 | US4989367 Method and apparatus for germinating seed sprouts |
| 01/31/1991 | DE4016824A1 Prodn. of shaped articles from inorganic granules - for use as plant growth substrate |
| 01/30/1991 | EP0410319A2 Spirogyra controlling and deodorant composition |
| 01/25/1991 | CA2021780A1 Spirogyra controlling and deodorant composition |
| 01/23/1991 | EP0409348A1 Drainage coupling member |
| 01/23/1991 | EP0409298A1 A method for aseptically plantlet rooting of in-vitro propagated material for the horti- and agriculture |
| 01/23/1991 | EP0408615A1 A method and a system for growing plants |
| 01/21/1991 | CA2021557A1 Drainage coupling member |
| 01/09/1991 | EP0407264A1 Soilless culture element |
| 01/09/1991 | EP0406803A1 A method for hydroponical growing of plants as well as a growing device and a system for the practicing of said method |
| 01/09/1991 | EP0406458A1 A growing device and a system for hydroponical growing of plants |
| 01/08/1991 | US4982527 Seedling propagation assembly |
| 01/02/1991 | EP0405571A1 Process for the elimination of liquid manure |
| 01/02/1991 | CN1048141A Quick culture technique of detoxicated miniature seed potato |
| 12/27/1990 | WO1990015527A1 Integument with breakable inner containers |
| 12/27/1990 | WO1990015524A1 Automated hydroponic growing system |
| 12/27/1990 | CA1278192C Production of seedlings |
| 12/26/1990 | CN1047955A Modelling of charcoal potted landscape by making use of plant fibre |
| 12/22/1990 | WO1990015528A1 A method for aseptically rooting of in-vitro propagated material for the horti- and agriculture |
| 12/22/1990 | CA2035021A1 Method for aseptically rooting of in-vitro propagated material for the horti- and agriculture |
| 12/20/1990 | DE4017334A1 Moisture retaining planting soil - made of vulcanite or fired clay with water retaining copolymer and water blocking mineral fibre |
| 12/19/1990 | EP0403348A1 Soilless culture substrates |
| 12/19/1990 | EP0402464A1 Solution culture apparatus |
| 12/18/1990 | US4978505 Automated system for micropropagation and culturing organic material |
| 12/11/1990 | US4977192 Polymer composition charged with powdered mineral material with a high capacity of water absorption |
| 12/11/1990 | US4976064 Equipment and methods for injecting aqueous nutrient solution in hydroponic culture |
| 12/05/1990 | EP0231387B1 Culture medium supports for plant tissue culture |
| 11/29/1990 | DE4015345A1 Optimum plant nutrition in culture substrate - by using water percolating through fertiliser mix in annular container |
| 11/21/1990 | CN1047008A Zeolite cultivating substrate for plant |
| 11/13/1990 | CA1276077C Culture medium supports for plant tissue culture |
| 11/07/1990 | EP0328560B1 Mineral substance, process for its manufacture and use thereof |
| 10/30/1990 | US4965962 Hydroponic culture system |
| 10/16/1990 | US4963431 With adhesives; for holding nutrients for plant growth |
| 10/16/1990 | US4962614 Perforated plant vessel for epiphytes |
| 10/09/1990 | US4961774 Applying aqueous extract of water hyacinth as plant growth regulator; hydroponics |
| 10/09/1990 | CA1274986A1 Aqueous rooting gel |
| 10/04/1990 | WO1990011348A1 PROCESS FOR STABILISING THE pH OF AQUEOUS FEED SOLUTIONS AND FOR ABSORBING AND BUFFERING URINE AND WOUND SECRETIONS |
| 10/02/1990 | US4959926 Blend of mineral wool fibers and cation exchange particles |
| 09/29/1990 | CA2010726A1 Method of stabilizing the ph in aqueous nutrient solutions for terrestrial plants, aquatic animals and cell cultures as well as for the absorption and buffering of urine and woundsecretions |
| 09/26/1990 | EP0389356A1 Substrate for soilless culture |
| 09/26/1990 | EP0389355A1 Substrate for soilless culture |
| 09/24/1990 | WO1990011008A1 Installation and method for the transport of growth units and the adjustment of their spacing and continuous cultivation method utilizing the same |
| 09/24/1990 | CA2049338A1 Installation and method for the transport of growth units and the adjustment of their spacing and continuous cultivation method utilizing the same |
| 09/21/1990 | CA2012594A1 Substrate for soilless culture |
| 09/19/1990 | EP0388287A1 Substrate for soilless culture |
| 09/19/1990 | EP0387971A2 Process and device for culturing chicory or the like and vessel for such a device |
| 09/15/1990 | CA2012273A1 Substrate for out-of-ground cultivation |
| 09/11/1990 | US4956286 Esterification of fatty acids or glycerides with alcohols by an enzyme catalyzed reaction |
| 09/04/1990 | US4953322 Method of growing a plant hydroponically |
| 08/28/1990 | US4951416 Nutrient supply system for hydroponic systems |
| 08/28/1990 | CA1273203A1 Method and apparatus for germinating seed sprouts |
| 08/21/1990 | US4950444 Spraying with thermosetting resin binder and surfactants; curing |
| 08/21/1990 | US4949503 Porous product for cultivation plants and a method for manufacturing same |
| 08/21/1990 | CA1272884A1 Aeroponic apparatus |
| 08/09/1990 | WO1990008460A1 Apparatus and method for controlling a system, such as a nutrient control system for feeding plants, based on actual and projected data and according to predefined rules |
| 08/07/1990 | US4945676 Method and apparatus for supplementing the feed solution of hydrocultures with desalinated water |
| 08/01/1990 | EP0380171A1 Agent and process for the cleaning of irrigation or water-distribution systems used in, for example, agriculture and horticulture |
| 07/26/1990 | WO1989011787A3 Control valves and method of plant growing using flow control |
| 07/25/1990 | EP0378940A1 Water-swellable composite material substrates useful for its manufacture and its uses |
| 07/18/1990 | EP0378487A1 Stabilizer web with a heating insert for soilless culture and for a container platform in a protected culture |
| 07/03/1990 | US4937969 Hydroponic system |
| 06/20/1990 | CA2005764A1 Composite material which is capable of swelling in the presence of water, supports which can be used for manufacture of same and uses thereof |
| 06/14/1990 | WO1990006058A1 Automated system for micropropagation and culturing organic material |
| 06/12/1990 | US4932158 Method and apparatus for hydroponic gardening |
| 06/06/1990 | EP0371545A1 Device for growing plants |
| 06/05/1990 | US4930253 Plant growing and handling method |
| 05/30/1990 | EP0370005A1 Process for cultivating plants fit for human use, in particular vegetables with low nitrate content |
| 05/23/1990 | EP0369771A1 Plant growth bed incorporating textile fibers |
| 05/22/1990 | US4927455 Plant growth medium |
| 05/22/1990 | US4926598 Method and apparatus for germinating seed sprouts |