Field Notes

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Other sites visited today: Hill Slough | Bouldin Corn | Mayberry | Gilbert Tract
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Bouldin Alfalfa: 2024-04-16 12:20:00 (DOY 107)
Author: Joe Verfaillie
Others: Daphne

Summary: Tall alfalfa, pulled weeds, swapped 7500 for calibration, standard data.

Bouldin Alfalfa
2024-04-16

Daphne and I arrived at 12:20 PDT. It was mostly sunny with some high cirrus clouds and a few scattered cumulus puffs. The alfalfa is tall enough to be harvested but still patchy – you can see bare ground in places. We could hear tractors to the southwest. There were some healthy weeds around our tower where they didn’t spray herbicide – I pull most of them except for the miner’s lettuce. Daphne pulled a bunch of nettles.

Daphne collected the flux, met, camera and FD data. She swapped the 7500: sn 75H-2514 came off and sn 0065 went on.
2154 read: 418ppm CO2, 660mmol/m3 H2O, 21.2C, 101.9kPa, 97SS
0065 read: 423ppm CO2, 571mmol/m3 H2O, 20.9C, 101.9kPa, 95SS
The eddy clock was adjusted by 5min from 11:24 to 11:29. The new config was loaded and pressure coefficients updated. It was logging when we left.

I did veg height while I waited for some cloud shadows to wander off and then did spectral measurements.

Daphne cleaned the radiometers.

We left at 12:45

Next Mowing: 2024-04-29

Veg Height (cm): Tape measure from ground to top of plant - Lush and ready for harvesting
44, 30, 35, 20, 45, 34, 33, 36, 23, 41, 27, 32, 18, 36, 20, 40, avg = 32.1, stdev = 8.55

0 photos found

7 sets found

4 BA_flux graphs found