2.3. Light interception by nets
The effect of nets on the interception of light was measured annually as a percentage of total PAR above canopy, using a Ceptometer mod. Sun Scan SS1-UM-1.05 (Delta-T Devices Ltd. Cambridge, UK) with a 64-sensor photodiode linearly sorted in a 100 cm length sword. Readings are in units of PAR quantum flux (_ mol m−2 s−1).
All measurements were done on clear days at noontime.
Measurements of global radiation were made every second day, three times during the day.
The Solarimeter-SL 100 is an easy-to-use portable autonomous solarimeter that measures solar irrigation range from 1 W m2 to 1300 W m2.
All spectral data were expressed as radiation intensity flux distribution in W m−2 nm−1.