Field Notes

<--2019-08-07 14:10:00 | 2019-09-11 08:15:00-->
Other sites visited today: Bouldin Alfalfa | Mayberry

Bouldin Corn: 2019-08-21 07:30:00 (DOY 233)
Author: Daphne Szutu
Others: Camilo

Summary: Regular data download/cleaning, LI-6400 measurements, LAI, veg height, corn has cobs and silks

2019-08-21
Bouldin Corn

Camilo and I arrived a little after 7:30 PDT. It was a sunny and warm day with some cirrus clouds near the horizon. When we arrived, there was dew on the weeds and on the upper corn leaves. Tyler arrived mid-morning to check on his chambers.

There were cobs on the corn; the silks were brown but not clumped together yet. Kernel Blister Stage/Growth Stage 2? https://www.agry.purdue.edu/ext/corn/news/timeless/GrainFill.html

We took light response curves and ACi curves on 5 corn leaves using the LI-6400. A-Ci curves and light response curves were measured in the youngest fully developed leaves. Light response curves were done with the Li-6400XT and included measurements of fluorescence. The A/Ci curves were done with the Li-6400 using the 2x3 LED cuvette. After the curves were completed, we measured chlorophyll content, and harvested the leaf for measurements of leaf area and mass.

I downloaded met, camera, zcams, USB GHG, and Purple Air data. I pulled dead leaves and a weed plant from the view of the under-row zcam. I cleaned the flux, rad, and Arable sensors and wiped off the outside of the phenocam window. The wash reservoir was full, so I did not top it off. I took 1-wand LAI and veg height measurements.

LI-7500 readings:
CO2 398 ppm
H2O 754ppm
T 28.3C
P 100.8kPa
SS 99--> 102 after cleaning
LI7700 readings:
CH4 1.97ppm
RSSI 41-->82 after cleaning

Before we left, we sprayed and knocked down 3 waspsâ€™ nests. We left at 13:05 PDT.

Veg Height (cm): Tape measure from ground to top of plant - Measured by DS
273, 282, 281, 290, 269, 275, 297, 280, avg = 280.9, stdev = 9.13

0 photos found

6 sets found

17 BC_met graphs found