Field Notes

Bouldin Alfalfa: 2020-04-03 11:40:00 (DOY 94)
Author: Daphne Szutu
Others: Mike

Summary: Regular data download/cleaning, veg height measurements, tall alfalfa, first site visit in a month

2020-04-03
Bouldin Alfalfa

Mike and I arrived at 11:40 PDT. It was a sunny and mostly clear day but breezy and cool. We parked on the dirt road north of the field and walked through the field to the tower. The alfalfa was tall, above our knees, but I didn't see any flowers. Maybe they will mow soon. It has been dry recently, but itâ€™s expected to rain for 3 days starting tomorrow. This is the first site visit in a month. The Bay Area is on the third week of COVID-19 shelter-in-place orders, with at least 4 more weeks to go.

I downloaded met, camera, USB GHG, and FD data. The FD data looked fine, so I cleared the data. I cleaned flux and met sensors. The wash reservoir was 85% full; we refilled it. We took veg height measurements.

LI-7500 readings:
CO2 420ppm
H2O 347ppm
T 15.4C
P 101.8kPa
SS 99--> 99 after cleaning
LI7700 readings:
CH4 1.96ppm
RSSI 38-->76 after cleaning

We left at 12:05 PDT.

Next Mowing: 2020-04-25

Veg Height (cm): Tape measure from ground to top of plant
68, 67, 59, 48, 46, 65, 72, 66, 48, 56, 61, 51, 54, 56, 58, 65, 67, 69, 69, 69, avg = 60.7, stdev = 8.16

1 photos found

20200403BA_TallAlfalfa.jpg ( 2020-04-03 12:06:47 ) Full size: 1920x1440
Tall and green alfalfa, no flowers.