Field Notes

Twitchell Rice: 2016-06-24 12:00:00 (DOY 176)
Author: Joe Verfaillie
Others: Dennis

Summary: Field was flooded in the last couple of days, replaced 7700 tubing, swapped out water level pressure sensor.

Twitchell Rice
2016-06-24

I arrived about 12 noon with Dennis. It was clear, sunny and hot. The wind was variable and changing direction from the northwest to the northeast. The fields have been flooded. They are very green but there are lots of weeds along with the rice.

The 7500 read: 382.5ppm CO2, 643.4mmol/m3 H2O, 26.85C, 102.07kPa, 78.7SS
The 7700 read: 1.95ppm CH4, 46.5 RSSI â€“ didnâ€™t get number after cleaning
Dennis refilled the wash reservoir. We replaced the wash tubing with the new black, UV resistant, tubing.

We removed water pressure sensor sn 20010770 and swapped in sn 70011236. The old one had a diurnal wave in its reading even when out of the water. The old one read 1.37psi and 18.49C and was 97cm below the water level. The new on went in 116cm from the top of the pipe and read 1.37psi and 20.6C. The top of the pipe was 29cm above the soil and there were 9cm of water.

Dennis measured veg height and washed the solar panels.

Veg Height (cm): Tape measure from ground to top of plant - field flooded
16, 23, 22, 22, 20, 19, 17, 17, 27, 18, 26, 25, 16, 17, 16, 22, 17, 21, 18, 21, avg = 20, stdev = 3.45

2 photos found

TW_autocam_20160624_1115.jpg ( 2016-06-24 11:15:01 ) Full size: 1920x1440
Joe and Dennis on site