Field Notes

Twitchell Alfalfa: 2014-07-08 15:30:00 (DOY 189)
Author: Patty Oikawa
Others: Madeleine, Kathleen

Summary: Wet road, heat flux plate found out of soil again, broke meter stick

We arrived at 15:30. There was a light breeze and a cloudless sky. The road to the tower was wet the whole way so we parked and hiked in. The alfalfa is tall and flowering and smelling great. I think this is my favorite site.
Mad measured veg height and cleaned the radiation sensors which she noted were very dirty. Kathleen measured LAI. I collected data and stepped on the meter stick (by accident-opps). I noticed the same heat flux plate from last week was pulled out of the ground (sn 6342). I reburied at 2cm near the tower. This needs to be re-installed properly.

7500
CO2: 390.83 umol/mol (394.58 after cleaning)
H2O: 720.1 mmol/m3 (763.7 after cleaning)
SS: 93.85% (94.81 after cleaning)
Pressure: 100.89 kPa
Temperature: 32.47ËšC
SOS: 353.1 m s-1

Met: OK

Veg Height (cm): Tape measure from ground to top of plant
40, 35, 50, 50, 50, 35, 50, 40, 60, 60, 50, 50, 40, 40, 60, 55, 50, 55, avg = 48.3, stdev = 8.22

1 photos found

TA_autocam_20140708_1445.jpg ( 2014-07-08 14:45:02 ) Full size: 1920x1440
Fieldwork