This study was conducted on a split field at the CSU Agriculture Development and Education Center. The first objective (north field) was to determine if manure applied at nitrogen-based application rates versus phosphorus-based application rates resulted in statistically different soil nutrient values. The treatments were:

1. control, fertilizer only
2. N-based, annual application
3. N-based, every 2 years
4. P-based, annual application
5. P-based, every 2 years
6. P-based, every 4 years

The second objective (south field) examined the effects of application and incorporation timing on the soil nutrient content. The treatments applied were:

1. Fall application, immediate incorporation
2. Fall application, 2 weeks until incorporation
3. Fall application, Spring incorporation
4. Winter application, Spring incorporation
5. Spring application, immediate incorporation
6. Spring application, 2 weeks until incorporation

Runoff and leaching data is currently being analyzed.

Funding provided by the Colorado Agricultural Experiment Station.

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Last updated November 5, 2007 by Webmaster