Field Notes

Bouldin Alfalfa: 2019-04-03 10:10:00 (DOY 93)
Author: Daphne Szutu
Others: Kyle, Camilo

Summary: Regular data collection/cleaning, clip plots, veg height, spectral, LAI-2200, alfalfa tall and beautiful

2019-04-03
Bouldin Alfalfa

Kyle, Camilo, and I arrived at 10:10. It was an overcast day with intermittent sun. The alfalfa was tall and beautiful, with large leaves. They will probably mow soon. The alfalfa under the tower was a little shorter than the surrounding alfalfa. The Nikon camera was out of batteries (â€œBattery exhaustedâ€) so we did not take a reference GCC photo.

Camilo took 5 clip plot samples and 20 vegetation height measurements. Kyle took spectral measurements. I took LI-2200 measurements (SW direction). The wash reservoir was 2/3 full; we refilled it. Kyle cleaned flux and rad sensors. The camera was again pointing down at the ground; Kyle adjusted it and used silicone to glue some bird spikes on top. I collected met, camera, USB GHG, and FD data. I connected directly to the 7700 to try to upgrade the firmware, but still couldnâ€™t connect to the sensor. Next time I will try a new 7700-ethernet cable.

LI-7500 readings:
CO2 418ppm
H2O 530ppm
T 18.3C
P 101.8kPa
SS 98--> 98 after cleaning
LI7700 readings:
CH4 2.15ppm
RSSI 57-->81 after cleaning

We left at 10:50.

Next Mowing: 2019-04-29

Veg Height (cm): Tape measure from ground to top of plant - Measured by CRS
52, 49, 44, 35, 38, 36, 35, 39, 35, 28, 35, 32, 33, 36, 34, 40, 45, 40, 32, 43, avg = 38.1, stdev = 6.04

3 photos found

20190403BA_LargeLeaves.JPG ( 2019-04-03 10:50:30 ) Full size: 1080x1440
Large, beautiful alfalfa leaves on the first crop of the year. Camilo's hand for reference.

20190403BA_TowerAlfalfa.JPG ( 2019-04-03 10:50:57 ) Full size: 1920x1440
Alfalfa under the tower is slightly shorter than the surrounding alfalfa. The surrounding alfalfa is the first crop of the year, so it's especially vigorous.