Patent ID: 6645267
Filing Date: 2003-11-11
Classification: A01G,C05D,C05F,Y02A,Y02P,Y10S

Abstract:
A process for preparing a plant growing medium consisting essentially of:(i) screening a fully bio-stabilised compost material to provide a retained fraction of particles under about 1 cm diameter, and a rejected fraction of particles having a diameter in excess of about 1 cm; (ii) screening the retained fraction from step (i) into three further fractions to provide a rejected fines fraction below 1 mm, a medium fraction of from 1 mm to 4 mm, and a coarse fraction of from about 4 mm to 1 cm; (iii) remixing metered amounts of the retained medium and coarse fractions from step (ii) with an agronomically acceptable amount of humified organic matter having a particle size of less than 1 mm, and a cation exchange capacity of from about 100 meq/100 g to about 400 meq/100 g; and (iv) remixing metered amounts of the product produced in step (iii) with and agronomically acceptable amount of an agronomically acceptable bulking agent, to provide a plant growing medium for agricultural use.