RS 478 Lecture Notes - Lecture 10: Biosolids, Soil Horizon, Topsoil

• School: CSU
• Department: Rangeland Ecosystem Science
• Course: RS 478
• Professor: Mark Paschke

Document Summary

Shows little or no sign of soil formation: soils can tell the ecological history of a site, topsoil = o and a horizon, (the good stuff on top) A and o: importance, why is topsoil important, makes for a good seedbed, organic matter, soil biota, plant nutrients, Critical for plants that require specific mutualisms: plant nutrients topsoil can be a primary source in restoration. Other soil horizons may contain lesser amounts of primary nutrients: plant propagules topsoil can be a primary source in restoration. The topsoil on a restoration site needs to be at a depth that ensures successful plant growth and this will vary with each site. The characteristics of the reference site can give insight into needed soil depth for the natural vegetation. Other determining factors include: the quality and quantity of material, topographic position, and plant species requirements: topsoil manipulation, remove and store (short and long-term), remove and replace immediately or.