Field Notes

<--2020-08-26 14:00:00 | 2020-09-01 13:55:00-->
Other sites visited today: East End | Mayberry | Sherman Wetland
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Bouldin Alfalfa: 2020-08-28 09:20:00 (DOY 241)
Author: Camilo Rey-Sanchez
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Summary: A Ci curves by Tyler's chambers. Plane spraying the fields

I arrived to Bouldin Alfalfa at 9:20 AM. It was a clear day with sporadic cloud cover and okay air quality. When I arrived, I observed from the levee that there was a plane spraying pesticides/herbicides? on our field and the adjacent ones. I waited and approached the alfalfa once the plane was gone. I did not want to get to close to the area near the tower because it had been recently sprayed, so I stayed near the entrance and was planning to do photosynthesis there. However, the plane came again, giving me clear signals to go away. I left the area and decided to do measurements in the alfalfa by Tyler's chambers. The plane continued spraying for about an hour after that. The alfalfa in our field looked nice and healthy about 60 cm tall, similar to the alfalfa by Tyler's chambers. I performed four A Ci response curves from 10 Am to 1 PM using the usual CO2 concentration steps: 400,300,200,150,100,75,50,400,500,600,800,1000,1300 ppm. I also ran a light response curve on the last leaf. I measured chlorophyll content and collected the leaves and brought them to the lab. I left at around 1:30 PM

Next Mowing: 2020-09-05

2 photos found

20200828BA_ACicurves_Tyler_Chambers.jpg ( 2020-08-28 11:14:00 ) Full size: 1920x1440
A-Ci curves in the Alfalfa by Tylers chambers