Field Notes

<--2015-07-06 09:30:00 | 2015-07-13 11:15:00-->
Other sites visited today: Mayberry | Twitchell Rice | East End | West Pond
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Twitchell Alfalfa: 2015-07-09 09:30:00 (DOY 190)
Author: Cove Sturtevant
Others: Sara, Miguel

Summary: Alfalfa way past cutting time. LGR running fine. Miguel soil respiration measurements. Data download.

Twitchell Alfalfa
2015-07-09

We arrived at about 09:30 PDT. Overcast, intermittent breeze, mild. The alfalfa is super flowery and probably heading past its prime.

Sara attended to the LGR trailer (running fine) while I downloaded data and did tower maintenance and veg height. Miguel started on soil respiration and we left him there to complete his measurements while we went to the other Twitchell Island sites.

The camera was off. Restarted fine.
Cleaned radiation sensors.
All measurements seemed good.

7500 readings:
CO2 = 387 ppm (392 after cleaning)
H2O = 699 mmol m-3 (same after cleaning)
signal strength = 83.02% (84.6% after cleaning)
p = 101.0 kPa
t = 19 C
sos = 346.0 m s-1

Veg Height (cm): Tape measure from ground to top of plant
60, 49, 61, 55, 58, 48, 51, 55, 66, 69, 43, 56, 54, 54, 56, 73, 59, 51, 66, 62, avg = 57.3, stdev = 7.46

1 photos found

TA_autocam_20150709_0845.jpg ( 2015-07-09 08:45:00 ) Full size: 1920x1440
Cove and Miguel on site