Ion exchanger fertilizers and a process for supplying plants with nutrients uniformly and over a long period of time

US4469502A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Harold Heller · Narberth, US
• Dietmar Schapel · Cologne, DE

Key dates

• Filing date: May 6, 1983
• Grant date: Sep 4, 1984
• Expiry date: May 6, 2003

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C05D9/02
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A process for supplying plants with nutrients uniformly and over a long period of time by the addition of nutrient-charged synthetic resin ion exchangers and mineral fertilizers to the culture medium, according to which the nutrient-charged synthetic resin ion exchangers are employed together with those mineral fertilizers with particle size <500 .mu.m which have been coated with massive polyurethanes having a particular water absorbing capacity which is adapted in a particular manner to the water solubility of the mineral fertilizer; furthermore, fertilizers containing nutrient-charged synthetic resin ion exchangers, and the mineral fertilizers coated with the massive polyurethanes having a particular water absorbing capacity.