Means and method of irrigation control

Details Means and method of irrigation control Means and method of irrigation control

1975-08-08

1977-08-09

Schwadron, Martin P.

Fluid handling

Processes

47 79, 73194R, 137 78, A01G 2500

Patent

active

040404366

ABSTRACT:
A means and method of irrigation control wherein a porous sensor is placed in the root zone in moisture transfer relation with the soil, and is supplied with air at a pressure sufficient to cause progressively increasing seepage of air through the sensor as soil moisture is lessened, there being means for detecting the rate of seepage of the air utilized to indicate moisture content of the soil for manually or automatically activating a timer for the irrigation system; the irrigation control further including the use of several sensors placed at different soil levels, as well as a warning sensor adapted to be activated should the soil start to become drier than its normal relatively moist condition.
An embodiment utilizes one or more selected plants with corresponding sensors as a means of detecting sudden weather changes to anticipate changes in ground moisture. A further embodiment utilizes an evaporation measuring means designed to detect incipient change in humidity indicative of sudden weather change.

REFERENCES:
patent: 2674490 (1954-04-01), Richards
patent: 3910300 (1975-10-01), Tal

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