A fertilizer trial for Ajinomoto USA, Inc. was conducted during the summer-fall months of 2009. The purpose of the study was to analyze the effects of several fertilizers compared with urea and an untreated control. Data collected included weekly visual quality ratings, weekly clipping mass, and analysis of total nitrogen percentage in leaves. Total nitrogen percentage data were determined from combined weekly clippings four times during the study.
Iowa State University
Brockhoff, Shane R. and Christians, Nick E., "Turfgrass Fertilizer Trial" (2010). Iowa State Research Farm Progress Reports. 360.