Show Observation

User: Peter Hudy

Created on: 2012-06-29

Observation Date 2012-06-28

Comment:
Sprayed the LTER Main Site Lysimeter area 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. The Lysimeter field area was sprayed over a period of 3 days: 6/25, 6/26, and 6/28. Each day, parts of the field were sprayed at the same rate based on remaining liquid in the sprayer after spraying other areas. 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 on 6/28 at 10:15 a.m. start were 75 degrees F (23.9 degrees C), 52% relative humidity, winds calm at 0 mph from WSW.

Areas:
LYSIMETER_FIELD

Observation Type:
Mechanical Weed Control

Activities:

Worker: Peter Hudy

Equipment: Top Air Sprayer • Material: Herbicide Roundup Power Max (glyphosate 48.7%) @ 22.0 ounce per acre • Material: Ammonium sulfate (AMS) @ 3.4 pound per acre

Equipment: TurboTeeJet 11003 Flat Fan Nozzle • Material: H2O @ 20.0 gallon per acre

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