Field Notes

Twitchell Alfalfa: 2014-07-15 15:00:00 (DOY 196)
Author: Cove Sturtevant
Others: Sara, Kathleen

Summary: Regular field work and site check. Spectrometer trouble.

Twitchell Alfalfa
2014-07-15

We arrived about 15:00 PDT. It was hot and sunny with a nice breeze. Sara and Kathleen did a veg height transect, clip plots, and LAI 2000. There was some trouble with connecting to the spectrometer, so no measurements.

7500 readings:
CO2 = 389 ppm (393 after cleaning)
H2O = 805 mmol m-3 (785 after cleaning)
signal strength = 93.94% (94.78% after cleaning)
p = 101.2 kPa
t = 30.5 C
sos = 352.3 m s-1

Met ok.
Rad ok. I tried to adjust the range on the LED sensor to fix #3 measurement, but no dice. Need a complete swap of this sensor.

Veg Height (cm): Tape measure from ground to top of plant - Flowering
54, 72, 48, 40, 52, 60, 50, 58, 42, 70, 53, 54, 50, 60, 62, 58, 54, 60, 44, 60, avg = 55.1, stdev = 8.31

2 photos found

TA_autocam_20140714_0915.jpg ( 2014-07-14 09:15:02 ) Full size: 1920x1440
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