Show Observation

User: Peter Hudy

Created on: 2012-06-26

Observation Date 2012-06-22

Comment:
Sprayed the LTER Main Site Treatment T1 and T3, all replications with Roundup Power Max (EPA Reg. No. 524-549) (Glyphosate: N-(phosphonomethyl)glycine, in the form of its potassium salt, 48.7%) and Ammonium Sulfate (sprayable, CAS #7783-20-2) for post-emergence weed control in soybeans. Roundup Power Max was applied at 22 oz/A and the ammonium sulfate was applied at 3.4 lbs/A. Equipment used: JD 5220 tractor traveling 4.8 mph (gear C1, 1400 rpm) with a pull type Top Air Sprayer equipped with a hydraulic centrifugal sprayer pump and a Raven 440 automatic carrier control unit. Turbo TeeJet 11003 nozzles were used, spaced 15 inches apart with a total boom length of 30 feet. 10 psi was used. Water applied at 20 gals/A (187 L/Ha) was used as the carrier. Weather conditions at 9 a.m. start were 66 degrees F (18.9 degrees C), 43% relative humidity, 10 minute wind velocity of 0 mph from NW. Weather conditions at the 2:30 p.m. end were 79 degrees F (26.1 degrees C), 59% relative humidity, 10 minute wind velocity of 3 mph from NW. Treatment T3 info: Sprayed the LTER Main Site Treatment T3, all replications (reps 2, 3, 5, 4, 1 and 6) with Roundup Power Max (EPA Reg. No. 524-549) (Glyphosate: N-(phosphonomethyl)glycine, in the form of its potassium salt, 48.7%) and Ammonium Sulfate (sprayable, CAS #7783-20-2) for post-emergence weed control in soybeans. Roundup Power Max was applied at 22 oz/A and the ammonium sulfate was applied at 3.4 lbs/A. Equipment used: JD 5220 tractor traveling 4.8 mph (gear C1, 1400 rpm) with a pull type Top Air Sprayer equipped with a hydraulic centrifugal sprayer pump and a Raven 440 automatic carrier control unit. Turbo TeeJet 11003 nozzles were used, spaced 15 inches apart with a total boom length of 30 feet. 10 psi was used. Water applied at 20 gals/A (187 L/Ha) was used as the carrier. Weather conditions at start were 61 degrees F (16.1 degrees C), 64% relative humidity, 10 minute wind velocity of 8 mph from NNE. Weather conditions at the end were 70 degrees F (21.1 degrees C), 39% relative humidity, 10 minute wind velocity of 12 mph from NNE. Because of the wind conditions, a lower boom pressure was used to create larger droplet size and reduce drift.

Areas:
T1 T3

Observation Type:
Mechanical Weed Control

Activities:

Attachments: