Field Notes

Twitchell Alfalfa: 2017-04-11 10:50:00 (DOY 101)
Author: Daphne Szutu
Others: Elke Eichelmann, Isabel Reche

Summary: Regular data collection/cleaning, clip plots and veg height, re-set camera clock (was one hour off)

2017-04-11
Twitchell Alfalfa

We arrived at 10:50. It was overcast, windy, and lightly sprinkling. There were sheep southwest of the field, about 400 m away, by the intersection of the gravel road with Twitchell Island Ferry Road.

Isabel took clip plot samples and veg height measurements.

Elke took soil respiration measurements. We cleaned the EC and rad sensors and the camera enclosure window.

I downloaded met, soil CO2, and USB GHG data, and swapped camera cards. After I swapped the camera CF card, I synced the camera clock with the laptop clock using StarDot Tools. When the camera read 11:02, I set it to 10:11.

LI7500 readings:
CO2 554.7 umol/mol --> 427.3 after cleaning
H2O 477.3 mmol/m3 --> 543.2 after cleaning
T 16.7 Celsius
P 101.6 kPa
SS 77.5 -> 92.3 after cleaning

We left at 11:30.

Veg Height (cm): Tape measure from ground to top of plant
32, 34, 30, 32, 26, 40, 33, 40, 34, 36, 32, 32, 34, 29, 38, 42, 34, 34, 42, 37, avg = 34.6, stdev = 4.26

0 photos found

7 sets found

Can't check TA_met
11 TA_met graphs found