Overview of the Project:
Our long-term biosolids project, started in 1994, has provided valuable information on the effects of continual biosolids application to dryland winter wheat. This project is an ongoing joint collaboration between Colorado State University and the Littleton/Englewood Wastewater Treatment Facility.
Our site is located approximately 14 miles north of Bennett, Colorado, in Adams County. Our crop of study is dryland winter wheat. Due to the wheat-fallow crop rotation used, we land apply biosolids every other year. In order to produce a crop every growing season, we have two sets of plots at the North Bennett site.
At the North Bennett site we apply biosolids at a rate of 0, 1, 2, 3, 4, and 5 dry tons of biosolids/acre, and we compare these to various nitrogen fertilizer (0, 20, 40, 60, 80, and 100 lbs N/acre). Analysis of variance and LSDs are used to determine differences within biosolids or nitrogen fertilizer treatments, and between biosolids and nitrogen treatments.