Field Notes

<--2015-09-02 10:00:00 | 2015-09-30 12:00:00-->
Other sites visited today: Mayberry | Twitchell Rice | East End | West Pond

Twitchell Alfalfa: 2015-09-16 12:00:00 (DOY 259)
Author: Patty Oikawa
Others: Dennis, Kyle, Sabina

Summary: Problems getting power to 6400, Forerunner wiring problems continue

Arrived at 12pm. It was partly cloudy and the spectrometer indicated that there wasnâ€™t enough light for reference. The entire field has been harvested now. Kyle cut the remaining alfalfa around the soil instruments that werenâ€™t cut with the machines. Kyle filled in holes around the tower with dirt and critterridder. The solar panels were partly covered again. Dennis cleaned sensors and I downloaded data. Sabina tried to make soil respiration measurements but we kept losing power. This may be due to poor connection with the tower or due to bad batteries at the tower. Dennis refilled one of the batteries with waterâ€”it was really dry. **NOTE: always carry 1 battery with the 6400 in case this happens again.
Sabina ended up with 3 files TA_20150916a-c for collars 1-4; collars 5and 6 were not measured.
We traced wires for the FR probes and all seem to be wired to the correct probes. I did notice that probes 8 and 16 were wired differently than 2cm.
Wire color 2cm 8cm 16cm
Grey 23H 28H 31H
Blue 24H 27H 30H
Purple 25H 26H 29H
Brown 25L 28L 31L

7500 readings:
CO2 = 365 ppm
H2O = 553 mmol m-3
signal strength = 91%
p = 101.5
t = 25 C
sos = 347 m s-1

Veg Height (cm): Visual estimate - Just cut
5, avg = 5, stdev = 0

2 photos found

TA_autocam_20150917_0645.jpg ( 2015-09-17 06:45:03 ) Full size: 1920x1440
Spider!