Show Observation

User: Ethan Rocklin

Created on: 2026-05-22

Observation Date 2026-05-21

Comment:
Applied UAN 28% fertilizer to GLBRC Sorghum N-Rate Study (North). Nitrogen application in the Sorghum N-Rate study followed the below gradient with applied amounts of liquid 28% fertilizer: SOF1: 0 lbs/A SOF2: 25 lbs/A = 8.4 gal/A SOF3: 50 lbs/A = 16.7 gal/A SOF4: 75 lbs/A = 25.1 gal/A SOF5: 100 lbs/A = 33.5 gal/A SOF6: 125 lbs/A = 41.8 gal/A SOF7: 150 lbs/A = 50.2 gal/A SOF8: 175 lbs/A = 58.6 gal/A All treatments were done with two passes for 15" row banding, except SOF2 (102, 203, 307, 403). Due to the low rate the applicator could not reach half of the desired amount to be split applied, therefore it was applied in one pass of 8.4 gal/A. (see attached map) Equipment used: John Deere 7420b tractor with FSC built Nitrogen applicator, orifices used for application were 57 for the five main center rows and 43 for the two outside rows. Rate listed below is an average of the treatment Nitrogen rates.

Areas:
Sorghum_Nitrogen_Rate_North_Experiment

Observation Type:
Fertilizer Application

Activities:

Worker: Ethan Rocklin

Equipment: John Deere 7420b Tractor (14.9 R 46 back tire size)

Equipment: Fertilizer Applicator - 28% and/or Liquids (LTER Built) Six Row • Material: Fertilizer UAN 28% @ 30.0 gallon per acre

Attachments: