Field Notes

Bouldin Alfalfa: 2021-05-13 11:45:00 (DOY 133)
Author: Daphne Szutu
Others: Joe

Summary: Regular data collection/cleaning, cleared debris off undercanopy PAR sensor

2021-05-13
Bouldin Alfalfa

Joe and I arrived at 11:45 PDT. The alfalfa bales have been removed, and the plants are back to shin height. I think they left the cuttings on the field too long and the alfalfa grew up under and into the cuttings - a lot of cuttings were left on the field and some of the alfalfa very pale to white leaves. We removed some dried cutting near the radiometers to the south. It was sunny and breezy with thin cirrus clouds overhead. Tyler is done with his insulated box at his alfalfa site and wondered if we needed it for anything.

I downloaded met, camera, and USB GHG data. I downloaded FD data and cleared its memory. The reservoir was 1/3 empty; we refilled it. Joe cleaned flux and rad sensors and the solar panels.

The undercanopy PAR sensor was covered with dead leaves, which we cleaned off. The undercanopy PAR is 2.5m at 205deg from the SW corner of the scaffolding. I took a few spectral measurements. Joe did veg height.

LI-7500 readings:
CO2 390ppm
H2O 820ppm
T 22.7C
P 101.5kPa
SS 96--> 101 after cleaning
LI7700 readings:
CH4 1.97
RSSI 28--> 80 after cleaning

We left around 12:15 PDT.

Next Mowing: 2021-05-28

Veg Height (cm): Tape measure from ground to top of plant - Lots of different heights maybe due to cuttings being left on the field too long
36, 26, 19, 40, 44, 32, 20, 31, 27, 44, 22, 36, avg = 31.4, stdev = 8.82

0 photos found

7 sets found

5 BA_flux graphs found