Show Observation
User: Peter Hudy
Created on: 2012-06-14
Observation Date 2012-06-14
Comment:
Fertilized LTER N-rate study (Irrigated and Non-irrigated fertility gradient study). Fertilizer applications were with 34-0-0 ammonium nitrate (granular) which supplied 34% nitrogen [purchased from Green Valley Agricultural Inc, Bangor, MI). A single pass of a Orbit-Air Gandy fertilizer applicator was used to broadcast and apply the correct amount of fertilizer. The amounts of nitrogen applied were as follows:
F1 (101, 203, 209, 404, 501, 603, 709, 804) 0 lbs N/A (0 lbs product/A);
F2 (102, 202, 304, 406, 502, 602, 704, 806) 15 lbs N/A (44.1 lbs product/A);
F3 (103, 205, 302, 407, 503, 605, 702, 807) 30 lbs N/A (88.2 lbs product/A);
F4 (104, 208, 305, 403, 504, 608, 705, 803) 45 lbs N/A (132.4 lbs product/A);
F5 (105, 204, 306, 401, 505, 604, 706, 801) 60 lbs N/A (176.5 lbs product/A);
F6 (106, 209, 308, 402, 506, 609, 708, 802) 75 lbs N/A (220.6 lbs product/A);
F7 (107, 201, 307, 408, 507, 601, 707, 808) 90 lbs N/A (264.7 lbs product/A);
F8 (108, 207, 303, 405, 508, 607, 703, 805) 110 lbs N/A (323.5 lbs product/A);
F9 (109, 206, 301, 409, 509, 606, 701, 809) 130 lbs N/A (382.4 lbs product/A). Guard plots were not fertilized. Time of application was between 10:00 and 12:15 p.m. Temperature at start was 72F, 47% relative humidity, skies were clear. Wind was calm between 1-3 mph at start from ESE. Equipment used: John Deere 7420b tractor pulling a Gandy Orbit Air applicator. The applicator was controlled by a Raven 660 automatic carrier control unit. Deflector were spaced 22.5 inches apart along the 15 foot boom length extending from the center of the drive-line off to the right side of the boom. For the Gandy/Raven set-up, the following were used: Density 60 lbs/cu ft; metering wheel 1 1/4” diameter (yellow); deflector spacing 22.5”; meter cal number 219; air pressure was 12 p.s.i. The Raven monitor automatically adjusted the application to maintain it at the set point regardless of ground speed; because of this, ground speed was adjusted to maintain a desired application rate of 2-2.5 lbs/minute/nozzle resulting in some treatments being fertilized at 1.2 up to 5.5 mph.
Areas:
Resource_Gradient-Irrigated Resource_Gradient_Non-Irrigated
Observation Type:
Fertilizer Application
Activities:
Attachments: