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User: Peter Hudy

Created on: 2012-05-24

Observation Date 2012-05-22

Comment:
Fertilized the LTER Main Site treatment N-rate Study (Nitrogen Fertility Gradient/Irrigation Experiment) with phosphorus. Three application rates were applied over the complete study: 110 lbs/A, 65 lbs/A and 0 lbs/A. All of the Non-irrigated study area received 65 lbs/A of product EXCEPT plots 308, 309, 411, 402, 403, 404 and 405. The 65 lbs/A of 0-46-0 supplied 30 lbs/A of P2O5. All of the Irrigated study area received 110 lbs/A of product EXCEPT plots 503 and 703. The 110 lbs/A of 0-46-0 supplied 50.6 lbs/A of P2O5. Plots which did NOT receive any product were 308, 309, 411, 402, 403, 404, 405, 503, and 703. Guard plots received the same application rate as the treatment to which they were the closest. Applied in a single application of using the John Deere 7420a tractor traveling 4.3 mph (range B3, 1350 rpm) and a Gandy Orbit-Air fertilizer applicator controlled by a Raven 6000 which monitored the application and automatically adjusted the metering rate for changes in ground speed. For the Gandy/Raven set-up, the following were used: Density 60 lbs/cu ft; metering wheel 1 1/4” diameter (yellow); deflector spacing 22”; meter cal number 210; air pressure was 13-14 p.s.i.; Boom length 30 ft, nozzles 16-24 inches above the ground level. Weather conditions: mostly sunny temperatures 69 degrees F.

Areas:
Resource_Gradient-Irrigated Resource_Gradient_Non-Irrigated

Observation Type:
Fertilizer Application

Activities:

Attachments: