Process and apparatus for automatically controlling the irrigati

Details Process and apparatus for automatically controlling the irrigati Process and apparatus for automatically controlling the irrigati

1985-02-05

1987-01-27

Feyrer, James R.

Plant husbandry

Algae culture

47 485, 47 58, A01G 2516

Patent

active

046385940

ABSTRACT:
The invention relates to a process for controlling irrigation in agriculture.
The object of the invention is to match the supply of water as closely as possible to the actual requirements of the plant. For this purpose, a pilot parameter linked to the water requirements and resources of the plant, preferably the diameter of a fruit, the trunk or a stem, is used to control irrigation. Daily variations consisting of a reduction in diameter in the middle of the day (1, 2) are preferably taken into account, and irrigation is triggered if this variation (3) exceeds a predetermined threshold.

REFERENCES:
patent: 2416664 (1947-02-01), Ruge
patent: 3797121 (1974-03-01), Brunner
Heilman et al (1968), "Adaptation of a Linear Transducer for Measuring Leaf Thickness", Agronomy Journal, vol. 60, Sep.-Oct. '68, pp. 578-579.
Powell and Thorpe, "Dynamic Aspects of Plant Water Relations", Fifth Long Ashton Symposium, Apr. 1975.
U.S. Department of Agriculture-Agricultural Research Device, "Pumping Air Through Leaves Indicates Plant Stress".

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