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Irrigation Performance Indicators Based on Remotely Sensed Data: a Review of Literature

✍ Scribed by W.G.M. Bastiaanssen; M.G. Bos


Book ID
110234561
Publisher
Springer Netherlands
Year
1999
Tongue
English
Weight
143 KB
Volume
13
Category
Article
ISSN
0168-6291

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A pinger device of frequency in the vicinity of 56 kHz and source level of the order of 166 dB, at 1 pPa/m, has been developed for sensing ambient temperatures in the range 5-30Β°C under water. The device uses a thermistor for sensing the temperature which changes the pulse repetition rate of the pin