HOTHOUSE SYSTEM FOR PREPARATION AND DELIVERY OF NUTRIENT SOLUTION Russian patent published in 1995 - IPC

FIELD: agriculture. SUBSTANCE: system comprises nutrient solution container 17 connected with a system of solution delivery and drainage pipes, solution concentration 18, 20 and temperature 19 transmitters, containers 22 (A. B. C. ) for solution ingredients, metering pumps 15 and 21. According to the invention, the system comprises additional container 11, hydrogen ion concentration transmitters 20 and 14, and an acid container. Container 11 is in communication via the metering pumps with the containers for solution ingredients and with the solution container 22. Transmitters 14 and 20 are installed in containers 17 and 11 and connected with the metering pump of acid container 22 which latter is connected by a pipe with container 11. EFFECT: higher accuracy in preparing the solution of preset concentration, and maintaining the required pH. 2 cl, 1 dwg