Field Notes

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Other sites visited today: Bouldin Corn | Twitchell Alfalfa
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Bouldin Alfalfa: 2017-12-19 11:00:00 (DOY 353)
Author: Joe Verfaillie
Others:

Summary: Upgraded 7550 box software, Swapped 7500 head, clip plots, veg height, sheep to the west

Bouldin Alfalfa
2017-12-19

I arrived at about 11am. It was cool with a thin overcast and a breeze from the southwest. The alfalfa has not been mowed. The tips have turned brown like it got frosted. There are sheep in the fields to the west. They might graze all the fields over the winter.

I upgraded the LI-7550 box from v8.0.0 to v8.5.0 and swapped the 7500 head for calibration
V8.0.0 sn0042: 487.5ppm CO2, 415.9mmol/m3 H2O, 14.51C, 102.3kPa, 96.2SS
V8.5.0 sn0042: 474.4ppm CO2, 427.1mmol/m3 H2O, 13.78C, 102.2kPa, 96.1SS
V8.5.0 sn0042: 483.2ppm CO2, 314.5mmol/m3 H2O, 100.8SS after cleaning
V8.5.0 sn2667: 483.0ppm CO2, 332.2mmol/m3 H2O, 13.16C, 102.6kPa, 106.3SS
7500 head sn 0042 came off and sn 75H-2667 went on

The 7700 read:
V8.0.0: 3.34ppm CH4, 48.3RSSI
V8.5.0: 3.32ppm CH4, 48.4RSSI â€“ 3.36ppm CH4, 82.0RSSI after cleaning
The wash reservoir was 3/4 full, but I did not have water with me. I thought about using the spray tank water but it look a little dirty and I think the remaining water will last.

I forgot to check the GHG file columns output. There are a bunch of extra 7700 columns that need to be removed next time.

I took three clip plots and did veg height.

Next Mowing: 2018-01-13

Veg Height (cm): Tape measure from ground to top of plant - Uneven canopy height, tops frost burned
28, 22, 22, 26, 40, 26, 18, 20, 26, 40, 30, 20, 33, 37, 30, 26, 43, 28, 31, 30, avg = 28.8, stdev = 7.05

0 photos found

7 sets found

5 BA_flux graphs found