Field Notes

Bouldin Alfalfa: 2025-03-07 12:35:00 (DOY 66)
Author: Daphne Szutu
Others: Arman

Summary: Taller wheat, downloaded LI-720 data

2025-03-07
Bouldin Alfalfa

Arman and I arrived at 12:35 PST. It was sunny, clear, and windy. We parked off of the field and walked along the edge of the field to the tower. The wheat is knee-to-thigh high but thankfully not too wet and the ground was relatively firm. Some of the leaves have yellow speckles; maybe they sprayed with something.

I wonder when they will harvest this wheat. The internet says May.

Arman cleaned flux and rad sensors and noticed the bottom window of the LI-720 was dirty with bird poop. He cleaned it off and maybe we can add some bird spikes to the top horizontal bar (without shading the PAR sensor).

I downloaded met, cam, USB GHG, and zcam data. I changed the eddy clock +3:15min from 12:43:30 to 12:46:45 to match the laptop clock (confirmed with my cellphone clock). I restarted logging afterwards. I also downloaded the LI-720 data: I moved all files from the microSD card to my laptop and downloaded two tables from the CR6 that seemed most relevant.

Arman took spectral and veg height measurements.

7500 read: 407 ppm CO2, 238 mmol/m3 H2O, 16.9 deg.C, 101.9 kPa, 91 SS – 97 after cleaning

We left at 13:00 PST.

I noticed from the phenocam photos that the LI-720 is getting shaded in the early morning by our scaffolding.

Next Mowing: 2025-05-02

Veg Height (cm): Tape measure from ground to top of plant - Wheat
81, 78, 72, 81, 73, 88, 75, 88, 73, 83, avg = 79.2, stdev = 6

1 photos found

20250307BA_720BirdPoop.jpg ( 2025-03-07 12:55:50 ) Full size: 1440x1920
Bird poop on the structure and window of the LI-720