Field Notes

<--2016-08-01 09:20:00 | 2016-08-16 11:45:00-->
Other sites visited today: Twitchell Alfalfa | West Pond | East End | Bouldin Alfalfa

Twitchell Rice: 2016-08-12 09:40:00 (DOY 225)
Author: Alison Haddad
Others: Elke Eichelmann, Kyle Hemes

Summary: reconnected DO sensor, SHFP1 readings fixed, ants in met box, regular data collection.

Arrived 9:40. Cloudless, 74 degrees Fahrenheit, light breeze. Very weedy field. Rice is starting to grow grains but is not yet headed.

Collected USB GHG data; collected met data from 23X, did not collect camera data; SHF1=-INF, all else looks good. The ground and signal cable had been cut from pulling on it, repaired cable, now reading comparable to other two SHFPs.

Returned later at 12:30 to refill the methane wash water reservoir, fertilizer pellets were being sprayed.

Reconnected the sn DO-8 sensor to port 9, reading 27mV when connected. DO sensor was ziptied about 6-8 inches from the well.

Ants in the met box, bring ant traps and putty next time.

Took LAI with 2200, one wand was recording only zeros so, used one-wand method instead of the two-wand method.

Took biomass samples and vegetation height (cm): 103, 94, 112, 73, 82, 70, 67, 76, 69, 65, 73, 92, 80, 138, 140, 79, 67, 79, 75, 65.

LI7500 readings
CO2 394.5
H20 612.8
T 22.48
P 101.96
Ss 82.7 ->83.5
Li7700 readings
CH4 ->1.96
rssi 53.7->70.8

Left: 10:35

Veg Height (cm): Tape measure from ground to top of plant
103, 94, 112, 73, 82, 70, 67, 76, 69, 65, 73, 92, 80, 138, 140, 79, 67, 79, 75, 65, avg = 85, stdev = 22.39

0 photos found

6 sets found

12 TW_met graphs found