Hydroponic growing systems

Details Hydroponic growing systems Hydroponic growing systems

1978-02-23

1980-07-08

Sewell, Paul T.

Plant husbandry

Water culture, apparatus or method

Nutrient recirculation system

47 59, A01G 3102

Patent

active

042110343

ABSTRACT:
A hydroponic growing system consists of an elongated growing unit disposed above a supply tank which normally contains a nutrient solution. The growing unit contains pearlite or another solid particle growing medium into which the plant roots extend. Periodically nutrient solution is pumped into the growing unit and then air is pumped through the nutrient solution and growing medium in the growing unit to aerate the plant roots which extend into the growing medium. Thereafter, much of the nutrient solution is permitted to drain from the growing unit to the supply tank with some of the solution adhering to the growing medium to nourish the plant roots.

REFERENCES:
patent: 2241699 (1941-05-01), Cooper
patent: 2983076 (1961-05-01), Merrill
patent: 3103763 (1963-09-01), Malchair
patent: 3451162 (1969-06-01), Rasmussen
patent: 4035950 (1977-07-01), Anselm
"Automatic Sub-Irrigation Sand Culture Technique for Comparative Studies in Plant Nutrition", 47/62, Lab. Pract. (GB), vol. 23, No. 1, Jan. 74.

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