Section 3: Soil Management and Erosion Control
This is a sub-collection of the soils lessons that detail soil management and erosion control.
Manure Phosphorus and Surface Water Protection I: Basic Concepts of Soil and Water P
This lesson focuses on the process of eutrophication; the relationship between land application of manure and soil phosphorus (P) dynamics on P delivery to surface waters; and on the P dynamics in water bodies that result in increased P available to aquatic vegetation.
Manure Phosphorus and Surface Water Protection II: Field and Management Factors
This lesson describes how source factors, including soil characteristics and management practices, affect phosphorus (P) delivery to surface waters; and also discusses how crop producers can control these factors through their management practices.
Manure Phosphorus and Surface Water Protection III: Transport Factors
This lesson addresses transport factors that may contribute to phosphorus (P) delivery to surface waters. Erosion, runoff, subsurface flow, drainage, and distance to surface water are the main factors. In some places, wind erosion may also be important. The effects of management practices on P transport are discussed, and water-related P transport processes are described in detail.
Manure Phosphorus and Surface Water Protection IV: Assessment of the Risk of Agricultural P Delivery
Addresses the assessment of potential for P delivery to surface waters resulting from the interaction of the source and transport factors addressed in Lessons II and III. The basic concepts and applications of P indexes as risk assessment tools are explored.