Question 2 How much of the nutrient should I apply??

Plant Nutrient Utilization Plant utilization –Corn uses 0.7 lb/bu N 0.4 lb/bu P 2 O 5 –Beans use 3.8 lb/bu N 0.8 lb/bu P 2 O 5 Plant fertilization –Corn needs 1.2 lb/bu N 0.4 lb/bu P 2 O –Beans need 0.0 lb/bu N 0.8 lb/bu P 2 O

Steps in Manure Nutrient Management 1. Determine crop nutrient needs 2. Determine manure nutrients available 3. Calculate hectares needed for the manure 4. Calculate manure volume to apply

Summary - Manure Planning Not difficult to do Economically advantageous Manure can replace purchased fertilizer Using manure correctly is good for the environment

Potential Pathways Phosphorus Surface water runoff Pathogens Surface water runoff Organic Matter Surface water runoff PollutantPathway 1. Nitrate – NLeaching & Runoff 2. Ammonium – NSurface water runoff & Aerial deposition

Soil and Water Quality Monitoring Techniques Soil sampling Surface water sampling Surface runoff Open ditch or irrigation canals Small or large rivers Ponds, lakes, reservoirs Ocean, sea Wetlands Groundwater Shallow groundwater Deep groundwater