Field Notes

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Bouldin Alfalfa: 2024-07-22 12:00:00 (DOY 204)
Author: Daphne Szutu
Others: Dennis

Summary: Regular data collection/cleaning, swapped 7500 for calibration

2024-07-22
Bouldin Alfalfa

Dennis and I arrived around 12:00 PST (13:00 PDT). It was warm, sunny, and breezy. There were thunderclouds over the Sierras, but otherwise there were no clouds in the sky. The alfalfa is flowering.

I downloaded met, cam, USB GHG, and FD data. Dennis did veg height and spectral data. I lost our usual 2GB SD card, so I used a larger microSD card with a card converter, but no data was on the card. Joe said that the jaz can only take 2GB cards.

I swapped the LI-7500A for calibration: sn 0065 came off and sn 75H-2667 went on. I uploaded a new configuration file and updated the pressure coefficients. All looked ok.

old 0065 read: 413ppm CO2, 858mmol/m3 H2O, 34.7C, 100.8kPa, 102SS
fresh 75H-2667 read: 415ppm CO2, 805mmol/m3 H2O, 35.3C, 100.8kPa, 96SS

We left at 12:25 PST (13:25 PDT).

Next Mowing: 2024-07-26

Veg Height (cm): Tape measure from ground to top of plant - Alfalfa flowering
61, 53, 44, 48, 48, 48, 50, 47, 45, 47, 40, 42, 38, 43, 51, 43, 41, 55, 51, avg = 47.1, stdev = 5.66

0 photos found

7 sets found

4 BA_flux graphs found