Field Notes

Twitchell Rice: 2016-05-24 10:30:00 (DOY 145)
Author: Alison Haddad
Others: Elke Eichelmann

Summary: Regular data collection, LI7500 replaced for maintenance, Tower still out of field, Rice is established.

Arrived at 10:30. Sunny, clear sky, fluffy clouds in the distance, light breeze. Rice is up, and sprouts are about 10cm tall. Field is still dry and tower is out of the field.

Filled the LI7700 wash water reservoir, but it was already mostly full. Cleaned the LI7500 and LI7700.

Collected USB GHG data, collected met data from 23x. One soil heat flux plate and one thermocouple on profile 2 not working: SHF2=-INF, ST2 04= -INF

Camera card pictures were not collected.

Took canopy height measurements in cm: 12; 12; 13; 6; 12; 11; 8; 10; 10; 8; 10; 13; 11; 13; 11; 9; 12; 13; 11; 9; row spacing was about 15cm.

Swapped the LI7500 for calibration. sn 75H-2176 came down, and sn 0065 went up.

LI7500 2176 readings
CO2 406.61
H2O 580.6
T 21.21
P 101.73
SS 88.081 ->85.9 after cleaning
LI7700 readings
CH4 1.89
RSSI 51.5 ->69.0 after cleaning

LI7500 0065 readings
CO2 407.55
H2O 525.1
T 21.35
P 101.75
SS 73.89

Left at 11:30

Veg Height (cm): Tape measure from ground to top of plant - row spacing about 15 cm
12, 12, 13, 6, 12, 11, 8, 10, 10, 8, 10, 13, 11, 13, 11, 9, 12, 13, 11, 9, avg = 10.7, stdev = 1.95

0 photos found

6 sets found

12 TW_met graphs found