04028847 is referenced by 65 patents and cites 20 patents.

An installation for continuously growing plants which includes one or more growth chambers wherein alternate periods of lightness and darkness are provided, and the environmental conditions are controlled. The plants are individually supported, and transported through the growth chambers in such a manner as to require a minimum amount of handling. A diverging track system is provided in one of the growth chambers for handling the plants in a prescribed manner and guiding them through the chamber. As the plants are moved through such chamber, increased space is automatically provided for plant growth. The installation is well suited for growing plants hydroponically.

Title
Apparatus for producing plants
Application Number
5/659311
Publication Number
4028847
Application Date
February 19, 1976
Publication Date
June 14, 1977
Inventor
Stanley C Rustad
Golden Valley
MN, US
William M Dreier
Golden Valley
MN, US
Noel Davis
Wayzata
MN, US
Agent
L M Lillehaugen
G O Enockson
Assignee
General Mills
MN, US
IPC
A01G 31/02
View Original Source