1991 Volume 53 Issue 4 Pages 53-59
To eliminate over-application from misdilution, save the cost of agricultural chemicals, and remove agitating power, automatic chemical metering and injecting system was considered and experimented. The range of spraying flow rate was 10 to 30l/min. The range of dilution was wide as 100 to 1000 times. The variance of diluent error was within 7 percents and the offset from the aimed dilution was within 5 percents. Applying this injecting device as an application rate controller of self-propelled sprayers was considered and tested in the laboratory. It was found that undiluted chemical application rate was fairly well controlled within the wide range of 0.5 to 3l/ha.
