Field Notes

Bouldin Alfalfa: 2020-01-23 12:30:00 (DOY 23)
Author: Daphne Szutu
Others: Camilo, Nicole K.

Summary: Regular data collection/cleaning, sheep on our field, LAI, spectral, veg height, measured sonic orientation

2020-01-23
Bouldin Alfalfa

Camilo, Nicole, and I arrived at 12:30. It was an overcast and cool day with a thin layer of clouds. There were groups of sheep scattered on several alfalfa fields in our row of fields. On our field and on the field to our east, there were sheep on the western side of the field. In the northeast corner of our field, there was a small paddock of ewes and lambs. An electrical fence was set up across the whole field, so we were only able to drive partway to the tower. The alfalfa around our tower has not been grazed yet.

I took 1-wand LAI measurements. Camilo took spectral measurements. Camilo and Nicole took veg height data with the water level tape (didnâ€™t have our regular measuring tape). I downloaded met, camera, USB GHG, and FD data. The reservoir was 1/5 empty; we refilled it.

Camilo and Nicole measured sonic orientation: on the compass it was 236 deg, on the phone compass it was 250 deg.

LI-7500 readings:
CO2 444ppm
H2O 547ppm
T 16.0C
P 102.3kPa
SS 100--> 101 after cleaning
LI7700 readings:
CH4 2.2ppm
RSSI 57-->78 after cleaning

We left at 13:15.

Next Mowing: 2020-04-25

Veg Height (cm): Tape measure from ground to top of plant - Measured with water level tape instead of measuring tape
31.75, 27.94, 35.56, 30.48, 38.1, 20.32, 25.4, 30.48, 39.37, 35.56, 36.83, 35.56, 44.45, 35.56, 25.4, 36.83, 45.72, 29.21, 34.29, 31.75, avg = 33.5, stdev = 6.25

1 photos found

bouldinalfalfa_2020_01_22_124612.jpg ( 2020-01-22 12:59:18 ) Full size: 1296x960
Sheep grazing alfalfa