Field Notes

Bouldin Alfalfa: 2018-01-04 13:20:00 (DOY 4)
Author: Daphne Szutu
Others: Elke, Kyle, Dennis

Summary: Regular data collection/cleaning, Alfalfa yellowing, Veg height

2018-01-04
Bouldin Alfalfa

We arrived at 13:20. We drove in from the shed direction. Since it has been raining the past few days, the wet roads were slick; we should reserve a 4WD truck next time. We parked by the side of the field. It was windy and partly cloudy.

The alfalfa was yellowing at the tip, with some green, shorter growth; Dennis suggested the alfalfa were affected by frost.

Dennis took veg height measurements by the road. Kyle and Elke took clip plot measurements.

I downloaded met, USB GHG, and camera data. Elke refilled the wash reservoir (it was half full), and Kyle cleaned the flux/rad sensors. I checked the Licor saved data columns and de-selected the CO2/H2O column "Diag Value," but I think we actually want to save Diag Value and de-select Diag Value 2. Diag Value 2 only gives us information about whether the 7700 and 7500 times are synched, but Diag Value gives us information about signal strength and the mechanical parts inside the sensor. I need to check the Licor saved data columns next time.

I connected to the stardot camera by typing the IP address into an Explorer window. When the time was 2017-05-05 13:40:05, I changed it to 2018-01-04 13:41:40. I applied the settings, which saved the configuration.

LI-7500 readings:
CO2 419 ppm
H2O 563 mmol/m3
T 18.2 C
P 101.8 kPa
SS 106 --> 107 after cleaning

LI7700 readings:
CH4 2.3 ppm --> 2.3 after cleaning
RSSI 63 --> 86 after cleaning

We left at 13:55.

Next Mowing: 2018-01-13

Veg Height (cm): Tape measure from ground to top of plant - Tall and yellowing at tips
47.5, 54, 53, 41, 42, 40, 56, 32, 18, 18, 32, 25, 22, 24, 24, 22, avg = 34.4, stdev = 13.32

0 photos found

7 sets found

5 BA_flux graphs found