Field Notes

Bouldin Alfalfa: 2018-07-12 09:10:00 (DOY 193)
Author: Katrina Cone
Others: Daphne, Alex, Kuno

Summary: Regular data downloading/cleaning, spectral, swapped 7500, LAI, veg height, added FD chamber, removed PRI and Vaisala barometer.

We arrived at 9:10. It was sunny and with a few wispy clouds, and surprisingly clear with a cool breeze. Alfalfa was flowering.

I took vegetation height with Kuno and handheld LAI measurements. The LAI file for Bouldin Alfalfa was accidentally named "BC" instead of "BA". The 2200 wand was displaying "wand error" message after 15 below measurements, so I closed the file, restarted, and it seemed fine. However, the same error would appear at East End later that day.

Alex took spectral measurements.

Kuno swapped the 7500 for calibration: sn 75H-2150 went up and sn 0065 came down. Daphne uploaded the configuration file, updated the pressure coefficient, and reset the box. She checked that the USB was logging, the 7700 was connected, and the 7500 and 7700 clocks were correct and synced.

Kuno cleaned the flux, rad, and Arable sensors and topped off the wash reservoir, which was mostly full. Daphne removed the PRIout sensor (sn 930103961) and Vaisala barometer (sn L1920571) because they have been funky.

Daphne did regular USB, met, and cam data collection.

An FD chamber was added, sn FD20160001. Daphne cleared data, synced the chamber with system time, and set the frequency for 5 minutes. We could hear it buzzing before we left.

We left at 10:10.
---------------------------------------------------
Li-7500:

Sn 65
CO2: 399ppm --> 402ppm (after cleaning)
H2O: 744ppm --> 710ppm
T: 22.2C --> 22.0C
P: 101.2kPa --> 101.2kPa
SS: 114 --> 116

Sn 2150
CO2: 405ppm
H20: 670ppm
T: 22.8C
P: 101.3kPa
SS: 97
------------------------------------------------------
Li-7700:

CH4: 2.01ppm
RSSI: 52ppm --> 73ppm (after cleaning)

Next Mowing: 2018-07-27

Veg Height (cm): Tape measure from ground to top of plant - Measured by Katrina and Kuno
38, 30, 22.5, 17, 35.6, 21.5, 45.6, 26.8, 27.5, 40.4, 51.2, 43.3, 34, 27.4, 22.1, 24.5, 22.6, 39.7, 27.5, 41.9, avg = 32, stdev = 9.52

0 photos found

7 sets found

5 BA_flux graphs found